4.0 Quake shakes Washington State

A 4.0 quake shook the Olympic Peninsula Monday evening. The quake was felt widely through the area. So far there have been no reports of injuries or damage.

The quake struck at 10:18 in the evening (11/26/07) near Brinnon, which is about 30 miles west of Seattle.

A 3.2 earthquake occurred in the same area this last January. Both quakes are shown on the following map images.

The first (left) is a regional view of the area, and the second (right) is a closer view (click to see full size).



Earth quake prediction

Pl observe following dates for major earthquakes
1. 22 nd December 2007 more than 7.5 on ritcher scale
2. 23 rd December 2007 more than 8.0 on ritcher scale
pl also observe FOLLOWING DATES FOR MAY 2008 FOR MAJOR QUAKES EXCEEDING 8.0
4,5,10,13,17 AND 20Th MAY 2008
the theory is based on tidal /gravitation force which takes in to account the impact of momentum change due to change of direction of major planets like Jupiter and Saturn coupled with the moon joining, squaring or opposing the planet or the Sun
pl watch the dates . The place also can be predicted with fair amount of accuracy
regards
A.J.DAVE
amitjdave1@indiatimes.com

Strong Shake Felt in Northern California

An Earthquake with a preliminary magnitude of 5.6 has shaken an area northeast of San Jose. The quake occurred at 8:04 PM local time on 10/30/07.

The quake was centered in a remote section of the Calaveras Valley about three miles southeast of the Calaveras Reservoir. This location is about 7 miles east of Milpitas, 9 miles northeast of San Jose, 14 miles southeast of Freemont.

At this time there has been no reports of injuries or damage. This may change as information regarding the quake is still coming in.

CLICK HERE for the latest information and discussion regarding this quake.

4.5 Earthquake hits Los Angeles area

LOS ANGELES (Reuters) - A small earthquake hit the northern Los Angeles area just before 1 a.m. (4 a.m. EDT) on Thursday (August 9, 2007), waking residents across a broad swathe of the area, but there were no immediate reports of significant damage.

The 4.5 preliminary magnitude quake was centered 4.1 miles north-northwest of the suburb of Chatsworth, according to the U.S. Geological Survey. It was extremely shallow, at only 3 miles deep.

Residents reported a strong jolt, followed by a lot of shaking. Some said pictures fell off walls, water sloshed around in toilets, and television sets wobbled on cabinets. A police spokesman said the quake triggered hundreds of alarms.

It was followed by two aftershocks, both with a preliminary 1.6 magnitude.

Chatsworth is just six miles west of Northridge, the epicenter of the magnitude 6.7 quake that killed 57 people and injured more than 9,000 in 1994.

Earthquake

Hi
pl note my earlier earthquake prediction and actual quakes, including the Peru quake.
pl note that a major quake will strike to day ie on 22 nd August 2007 at 15.30 GMT.
However the place is still not known
next dates are
22 nd Dec 2007
29 Th Dec 2007
pl watch the dates
regards
DAVE

4.3 quake felt near Watsonville

UPDATED 7/2/07

An earthquake with a preliminary magnitude of 4.3 struck the Watsonville area monday afternoon. The quake struck at 12:58 PM and was felt throughout the region and up into the San Francisco bay area.

There have been no injuries and damage has been limited to a few items falling off store shelves.

Two smaller quakes occured in this area last week. CLICK HERE to read our report on those quakes.

If you felt this earthquake and would like to share your story (or read other accounts), please check our message board.

Don't forget to check out our 2007 quake map to see other Northern California quakes in 2007. Our list of previous years quakes can be found on the right side of our web site.

Small Quakes Rattle Watsonville

UPDATED: 7/2/07

A new 4.3 quake has been reported in this area. CLICK HERE for our special report.

Residents in Watsonville were shaken by a series of small quakes late this afternoon. The three quakes, measuring 3.0, 3.2 and 3.0, all occurred within 15 minutes of each other.

The earthquakes were felt within the Watsonville and surrounding communities. The shaking has been described as a gentle rumbling ending in a sharp jolt.

If you felt this earthquake and would like to share your story (or read other accounts), please check our message board.

Be sure to check out our 2007 quake map to see other Northern California quakes in 2007. Our list of previous years quakes can be found on the right side of our web site.
A strong earthquake with a preliminary magnitude of 6.7 has occured off Bougainville Island.

The following is a release by the United States Geological Survey, National Earthquake Information Center: An earthquake occurred about 220 km (135 miles) SSW of Arawa, Bougainville, PNG or about 825 km (520 miles) E of PORT MORESBY, Papua New Guinea at 8:52 PM MDT, Jun 27, 2007 (Jun 28 at 12:52 PM local time in Papua New Guinea). The magnitude and location may be revised when additional data and further analysis results are available. There have been no reports of damage.

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WIKI:
The Bougainville Province, also known as North Solomons Province, is an autonomous province in Papua New Guinea and is the largest of the Solomon Islands group. The largest island is Bougainville Island, and the capital is Arawa. The province also includes the adjacent island of Buka and assorted outlying islands including the Carterets. The population of the province is 175,160 (2000 census). Bougainville Island is ecologically and geographically, although not politically, part of the Solomon Islands. Buka, Bougainville, and most of the Solomons are part of the Solomon Islands rain forests ecoregion. MORE

Strong quake jolts southern part of Java

Deutsche Presse-Agentur

Jakarta - A 6.0-magnitude earthquake struck the southern part of Indonesia's Java island Wednesday morning, but there were no immediate reports of injuries or damage, an official said.

The tremblor shook at about 5:23 am (2223 GMT Tuesday) and was centred in the Indonesian Sea 340 kilometres southwest of Cilacap district in southern coast of Central Java, said Anas, an official at the Meteorology and Geophysics Agency in Jakarta. He said the quake occurred at about 33-kilometres beneath the seabed.

Anas, who like many Indonesians uses only one name, said the quake was felt along a wide stretch of the southern Central Java coast, including the cultural city of Yogyakarta, but there were no reports of injuries or damage.

Yogyakarta and nearby regions has been struck by a powerful 7.3-magnitude earthquake on late May 2006, killing more than 5,800 people, injuring thousands of others and destroying and heavily damaging tens of thousands of homes and buildings.

Indonesia, the world's largest archipelago nation, is prone to earthquakes because the country sits atop Asia's so-called "Ring of Fire" where continental plates collide and earthquakes and volcanic eruptions are frequent.

Earthquake shakes Northern California Coast

The Eureka Reporter - A magnitude 5.1 earthquake rattled parts of the North Coast Sunday at 7:32 p.m. The U.S. Geologic Survey indicated the temblor was located 41 miles northwest of Eureka at a depth of approximately 6.3 miles. There was no indication that the earthquake caused any major damage or injuries. According to the U.S. Geologic Survey’s 24-Hour Aftershock Forecast Map, as of 8 p.m. Sunday, there was a low probability of aftershocks occurring in the region.

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If you felt this quake and have a story to tell, come on over to our "Quake Stories" board to share and to read other stories about this quake.

Also, be sure to check out the 2007 Earthquake map to see this quake along with other signficant quakes of 2007.

Space Shuttle Brings Sonic Boom

Many people accross Southern California reported feeling an earthquake shortly before 12:45 pm (west coast time). As it turns out the culprit was not an earthquake, it in fact was the expected sonic boom caused by the return of the Space Shuttle Atlantis.

The shuttle was expected to land in Florida, but due to bad weather the landing was changed to Edwards Air Force Base in the Southern California desert.

The shuttle's path to the base took it over San Diego and Los Angeles before landing smoothly at 12:49 pm.

Small quake shakes Tennessee

It has been in the works for quite a while: "On the morning of June 19, Tennessee will experience a 7.7 magnitude earthquake inside the New Madrid Seismic Zone near Memphis." What they weren't counting on was a Real quake to strike Tennessee that day.

Tuesday June 19th is the start of one of the states largest emergency response drills. While the main focus of the simulation is the New Madrid Seismic Zone near Memphis, a real earthquake was being felt 170 miles east near the small town of Spencer (about 50 miles North of Chattanooga).

Although the quake was not widely felt, it is a constant reminder that earthquakes can occur at anytime and anyplace and they don't always strike along active fault lines. Tuesdays quake measured 3.3 and occurred at 1:16 PM local time.







If you think that earthquakes never happen in this area, you may be interested in this map which shows all earthquakes in the area (since 1970) with a magnitude of 2.5 or greater.










Here is the map showing the specific location of this quake








Related Links:
New Madrid Seismic Zone
Tennessee Earthquake Information
Tennessee to test earthquake plan

Earthquakes Continue in Northern Oregon

The area between Kent, Oregon and Maupin, Oregon has seen steady quake activity since December of 2006. The quakes have been in a concentrated area about 8 miles ESE of Maupin.

Most of the quakes are small and have not been felt. Quakes of this size usually go unnoticed by most. However, this sequence, now in its seventh month, has raised eyebrows because this kind of consistent quake activity has never been recorded in this location.

On Thursday afternoon, the strongest quake of the sequence was recorded. The 3.9 quake was the strongest in the region since a 4.2 earthquake in November of 1976.

CLICK HERE to view a special report showing all quakes in the area since 1976.

6.8 Earthquake off the Coast of Guatemala

The following is a release by the United States Geological Survey, National Earthquake Information Center: An earthquake occurred 115 km (70 miles) SSW of GUATEMALA CITY, Guatemala at 1:29 PM MDT, Jun 13, 2007 (1:29 PM local time in Guatemala). The magnitude and location may be revised when additional data and further analysis results are available. No reports of damage or casualties have been received at this time; however, this earthquake may have caused damage due to its location and size.

------------
From the Associated Press
1:43 PM PDT, June 13, 2007



GUATEMALA CITY -- A powerful earthquake shook Guatemala on today, U.S. seismologists said, but there were no immediate reports of damage or injuries in the capital.

The magnitude 6.8 earthquake struck at 1:29 p.m. local time (3:29 p.m. EDT) and was centered 70 miles southwest of Guatemala City off the Pacific coast, according to the U.S. Geological Survey.

Firefighters in Guatemala City said they had no immediate reports of injury or damage.

Radio Sonora reported that houses were damaged along the Pacific coast, with mudslides in several areas. But firefighters in several coastal communities, including Santa Rosa and Escluintla, told The Associated Press they had received no reports of damage.

The quake was felt in neighboring El Salvador, where people ran into the streets in the capital of San Salvador.

Carlos Lopez, a spokesman for the Red Cross in El Salvador, said there were no immediate reports of major damage in that country.

The region is prone to earthquakes. One of Guatemala's most devastating quakes was in 1976 when nearly 23,000 people died.

----------------------------------

This report will be updated as new information is received

Here are two maps showing the location. The first is a wide view, the second a closer view. (click on image full size image)

Moderate Quake Near Mammoth Lakes

Aftershocks continue after a 4.6 earthquake shook the Sierra Nevada Mountains in Central California early Tuesday morning. The quake struck just after 12:20am (Pacific Coast time). So far there have been more than 160 aftershocks. Four of the aftershocks have been 3.0 or higher, with the largest being 3.6. The quake was preceeded by a 3.6 foreshock.

Hundreds of people throughout central California and Western Nevada have reported feeling the quake. Some of the stronger aftershocks have been felt by people in the vicinity of the epicenter.

The map here shows the area affected by this series of earthquakes.

This region of the Sierra Nevada's is very familiar with earthquakes. The last strong quake to register above 5.0 was back on May 15, 1999. When the area experienced a 5.6 quake. Even stronger damaging quakes ocurred in 1980.

Explore our Northern California historical Quake maps located on the right side of our website to see quakes in this area over the years.

3.5 Aftershock West of Frazier Park



Tuesday's 3.5 earthquake was an aftershock to the 3.7 quake which shook the region early Monday morning. Both quakes, along with several smaller aftershocks, are occuring along a segment of the San Andreas fault near the Grapevine.

Anthony Guarino with the Southern California Seismic Network reports that this quake may have been felt in Valencia, Gorman, Castaic, and surrounding communities.

There were no reports of damage or injuries.

This map shows where these quakes occured in relation to the surrounding communties and it's proximity to the San Andreas fault. The orange quake on left is a 3.0 which occured on March 1st of this year.



A closer view of the quake area.

Earthquake in China kills two, injures 200

Asia-Pacific News

Jun 3, 2007, 2:43 GMT

Beijing - A strong earthquake measuring 6.4 on the Richter scale struck an area of south-western China's Yunnan province early Sunday, destroying houses, killing at least two people and injuring more than 200.

The epicentre of the quake at 5:34 a.m. (2134 GMT Saturday) was at 23.0 degrees north and 101.1 degrees east near Yunnan's Pu'er city, near the border with Myanmar, state media quoted the China Earthquake Administration as saying.

There were reports of damage and casualties in the old town of Pu'er, and by mid-morning local officials had confirmed two people dead and more than 200 injured, 15 of them seriously, the official Xinhua news agency said.

Rescue teams were sent to the affected area to assess the damage and help victims, the agency said.

The US Geological Survey said the quake struck at a depth of 10 kilometres.

4.2 Quake Hits Southern California Desert

A quake with a preliminary magnitude of 4.2 struck the lower Southern California Desert Friday Night. The quake was widely felt from the deserts to the coast, and even reports that it was felt as far away as Phoenix Arizona, some 250 miles away. Nearly 2,000 felt reports were filed within the first hour of the quake.

If the felt reports are accurate, it's my experience that this quake's magnitude will be upgraded sometime soon.

Click on the picture above to see exactly where this quake struck, along with other quakes in the area that have occurred in 2007.

Small Earthquake Shakes California-Mexico Border

Associated Press - June 1, 2007 12:04 AM ET

OCOTILLO, Calif. (AP) - A small earthquake has rattled a desert town near the US-Mexico border, but there are no immediate reports of damage or injuries.

A preliminary report from the US Geological Survey says the magnitude-3.9 temblor struck at 7:08 pm. It was centered eight miles southwest of Ocotillo, about ten miles north of the border.

A dispatcher with the Imperial County Sheriff's Department says there are no reports of injuries or damage.

Small Quakes Rattle Lakeview, Oregon

Two small quakes rattled the California Oregon border near Lakeview, Oregon this evening. The two tremors, registering 3.4 and 3.0 on the richter scale struck right around 7:00 local time on May 30, 2007.

The following two maps show where these quakes occurred. These quakes are preliminary, and their location and magnitudes may change as new data is reviewed.

CLICK HERE to see where this quake struck. (291kb image)

CLICK HERE for an even closer view. (304kb image)

I have prepared a special report showing a map and a list of all quakes in this area, going back to 1982. CLICK HERE to view the special report.

I will revise this report as needed.
USGS report

On April 25 at 11:06 a.m. PDT, a major earthquake struck northern California. This magnitude 7.2 earthquake was located about 30 miles (50 km) south-southwest of Eureka. Ninety-five people were injured and considerable damage occurred in southwestern Humboldt County. The preliminary estimate of damage from this earthquake, and two strong aftershocks described below, is 66 million dollars. The observed maximum intensity, VIII, was experienced at Ferndale, Honeydew, Petrolia, Rio Dell, and Scotia. Landslides and rockfalls occurred in the Honeydew-Petrolia area. The quake was felt throughout much of northern California and as far south as San Francisco and southeast to Carson City and Reno, Nevada. It was also felt in many areas of southern1002 Map of Petrolia Earthquake Oregon. A tsunami was generated with maximum wave heights (peak-to-trough) of 1.1 meters at Crescent City and 0.2 meters at Point Arena, California, and 0.1 meters on Hawaii.

At 12:42 a.m. PDT on April 26, a magnitude 6.5 earthquake hit the same area causing some additional damage in the Ferndale, Petrolia, and Fortuna areas. A fire caused by a broken gas main destroyed much of the business district of Scotia. The quake was felt throughout much of northern California.

Less than 4 hours after the second quake, at 4:19 a.m. PDT, the same area experienced a third strong quake. This magnitude 6.7 earthquake caused additional damage in the area of Ferndale, Fortuna, and Petrolia. It was also felt thoughout much of northern California and southern Oregon and to the south as far as Salinas, Santa Cruz, and San Francisco. These earthquakes were accompanied by numerous aftershocks. Many of the aftershocks were in the magnitude 4.0 to 4.8 range. Some of them were strongly felt, but they caused very little damage.

3.2 Earthquake Felt in Oklahoma

UPDATED (5/29/07)

A 3.2 magnitude earthquake struck near Henryetta, Oklahoma shortly after 4:00 PM local time on May 27, 2007. There were no injuries and no damage was reported.

Earthquakes of this size are not all that uncommon in this part of Oklahoma. Historical records indicate that since 1975 at least 21 earthquakes with a magnitude of 3.0 or higher struck within 125 miles of today's quake.

Here is a list of those quakes, starting with the most recent:



Oklahoma Earthquake Map (2007)

Here is a map showing the region and all quakes since 1975

Click on image for larger version



Olahoma Earthquake Map

Here is a closer map

Click on image for larger version


 



Oklahoma Earthquake Map

Here is an even closer view showing the specific location of this most recent Oklahoma quake

Click on image for larger version

Earthquake Preparedness

The Los Angeles Fire Department published a great earthquake preparedness guide which they have made available on the Internet.

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To those of us who live and work in the Greater Los Angeles area, earthquakes are a reality. In order to deal with this situation, earthquake preparedness must become a way of life. In the event of a major earthquake, freeways and surface streets may be impassable and public services could be interrupted or taxed beyond their limits. Therefore, everyone must know how to provide for their own needs for an extended period of time, whether at work, home or on the road.

Our goal in providing this information is to encourage you to prepare for a major earthquake and to maintain that readiness. Part of becoming ready is having the necessary supplies. Earthquakes, in our area, can happen at any time. They are not totally predictable. There are long periods between episodes. This is why it is important to maintain fresh emergency supplies through rotation of older stock into daily use. The quality of life and the potential for survival are greatly increased by being prepared.

William R. Bamattre
Chief Engineer and General Manager
Los Angeles City Fire Department

THE EARTHQUAKE PREPAREDNESS HANDBOOK
Report prepared by the Hawaiian Volcano Observatory:

A magnitude-4.7 earthquake was recorded by the U.S. Geological Survey’s Hawaiian Volcano Observatory on May 24, 2007 at 9:13 a.. H.s.t. It was located beneath the upper east rift zone of Kīlauea volcano, near Puhimau crater, at a depth of 2 km (1 mile). A magnitude 4.1 aftershock occurred at 9:33 a.m. and was located 1.5 km (1 mile) farther downrift beneath Koko‘olau crater. A magnitude-3.9 aftershock occurred at 10:51 a.m. and was located 4 km (2 miles) farther downrift than the magnitude-4.7 at a depth of 1 km (1 miles). These earthquakes are the largest so far in a flurry of earthquake in the upper east and southwest rift zones that started May 12, 2007. The earthquake flurry has not been accompanied by any unusual swelling of the summit or other signs of unusual summit activity. HVO is watching the situation closely.

Since 1998, a few earthquakes with magnitudes greater than 4.0 have occurred at shallow depths beneath the upper east rift zone. Today’s event was the largest in at least the last 50 years.

Big Island Earthquakes are Normal

from: Hawaii Big Island Volcano Update

We live on volcanos!

But nonetheless, they often make the news so we feel compelled to share any updates. Many times though, earthquakes never make the news outside of the local neighborhoods surrounding Pu`u O`o. It just depends on the volumes of news the big papers are already dealing with. Here’s the scoop on the latest newsworthy earthquake.

“A magnitude-4.7 earthquake occurred at 9:13 am HST at shallow depth beneath the summit caldera and was followed by several aftershocks, the largest of which was a 4.1 at 9:33 am. The earthquake and its aftershocks had no appreciable effect on the continuing Kilauea eruption.

The long story that won’t change daily: Over the past several months, Kilauea caldera has been expanding at a rate of 1.5 cm/month indicating minimal magma storage there; most of the magma supply continues to feed the Pu`u `O`o vent. Pu`u `O`o cone is slowly collapsing as shown by cracks spreading on its south flank and about 1 cm/month subsidence of its north flank.”

Two Quakes Shake Southern California

May 23, 2007

Parts of Southern California were shaken by two mild earthquakes Wednesday night. Both quakes measured 3.9, and were centered about 2 miles South-Southeast of Devore, California. The first came in at 11:11 PM while the second struck less than five minutes later at 11:15 PM.

Although there have been no reports of injuries or damage, the quakes have been felt all the way the Los Angeles coastline, nearly 80 miles away.

Quakes are not uncommon in this area of the Southland. There have now been five quakes with a magnitude of 3.0 or greater in this general area since the start of the year.

I have created a special page showing the last 20 years of earthquake activity in the immediate Devore area. CLICK HERE to see a list of all quakes (2.5+) between 1987 and 2007.

Remembering the 1999 Bolinas Earthquake

Written in August 1999 by JCP Seismologists

BOLINAS, CA -- Foundations rocked and rolled as far south as Santa Cruz County -- and shuddered sharply in Bolinas at the epicenter of one of the first significant earthquakes to strike the Bay Area since the Loma Prieta disaster nearly a decade ago. The temblor was felt thoughout much of the North Bay region.

Fortunately, the quake's size was fairly small, at magnitude 5.0. With the exception of a few emptied store shelves and a toppled chimney in the community of Bolinas, 15 miles northwest of San Francisco, there was little damage to speak of.

The shock struck north of the Golden Gate along the San Andreas fault zone near its intersection with the San Gregorio fault, which extends offshore southward from the Bolinas area. Although the San Andreas fault in this area is visited frequently by minor seismic activity, Tuesday's quake was one of the largest to occur along on this stretch of the fault since it ruptured here in the great San Francisco earthquake in 1906.

The U.S. Geological Survey forecast a 1-in-10 chance of strong and possibly damaging aftershocks in the Bolinas area during the week following Tuesday's quake.

Although this earthquake is insignificant in comparison to the disastrous magnitude 7.4 shock in Turkey just the day before, it may prove interesting for local scientists studying the likelihood of future earthquakes in the Bay Area.

The USGS and collaborating scientific agencies are currently updating their estimates of earthquake probability for the region's fault segments, one of which is the San Francisco Peninsula segment. This is a section of the San Andreas fault that extends from Los Gatos northwestward to the Bolinas area, and is immediately north of the Santa Cruz Mountains segment that ruptured in 1989 causing the Bay Area's most recent earthquake disaster.

In its magnitude of 5.0 and its location near the end of a San Andreas fault segment, Tuesday's jolt at Bolinas is not unlike two moderate quakes that closely preceded the Loma Prieta shock. Those events, of magnitude 5.3 and 5.4, occurred near Lake Elsman just south of Los Gatos, about 16 months and 2 months before the earthquake on October 17, 1989.

The Lake Elsman events struck where the northern end of the Santa Cruz Mountains segment and the southern end of the Peninsula segment meet. Their timing and location has led some scientists to regard the Lake Elsman quakes as "preshocks" to the subsequent magnitude 7.1 Loma Prieta rupture -- useful harbingers, if so, had they been recognized as such.

Is the Bolinas quake a preshock of a larger quake to come? On this question the jury hasn't yet had time to convene.

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USGS Report

8/17/99 Magnitude 5 earthquake near Bolinas, CA

The magnitude 5 earthquake that occurred on Tuesday, August 17 at 6:06PM local time was located beneath Bolinas Lagoon in Marin County at a depth of about 4.2 miles. It was felt broadly throughout the San Francisco Bay Area and yielded instrumental records of shaking that reflect various ground conditions in the Bay Area.

The earthquake occurred along a stretch of the San Andreas fault that had more than 20 feet of slip in 1906 as indicated by offset fence lines. In contrast, Tuesday's event probably resulted in slip of a few cm on a small patch of fault at depth.

Scientists consider Tuesday's quake to be a small to moderate size event. It would take approximately 4000 such earthquakes to equal the energy released by the 1989 Loma Prieta earthquake or 30,000 such earthquakes to equal the energy released in the magnitude 7.4 earthquake in Turkey which occurred on the same day.

The Bolinas earthquake is interesting to scientists for two reasons:
  • It occurred in a region that has had only one previous earthquake in the last 30 years of detailed seismic recording.

  • Information obtained from the earthquake waves indicate an up-down direction of slip not the sideways (or lateral) slip expected for the San Andreas fault.

The first observation was somewhat of a surprise. Much of the 300 mile length of the San Andreas fault that ruptured in 1906 (from San Juan Bautista to Cape Mendocino) is currently aseismic (relatively free of earthquakes) and has been since 1906. Scientists consider the San Andreas fault in Northern California to be in a "locked" part of its earthquake cycle.

The second observation suggests that, in detail, this earthquake probably was not on the San Andreas fault, but rather occurred on a small fault adjacent to the main fault at depth.

Two Earthquakes Rattle North Coast of California

by Heather Muller , 5/9/2007
The Eureka Reporter

“I thought I was on a boat in the ocean,” said Renee Jacobsen, manager of the Petrolia Store and former chief of the remote town’s volunteer fire department.

The magnitude 5.2 earthquake that struck 39 miles west of Petrolia shortly before 1 a.m. Wednesday “pushed you up like on top of a wave,” she said.

“And then there was the aftershock,” she said, a magnitude 4.5 temblor 17 minutes later and two miles closer to shore.

“That one was more like a sharp jolt.”

According to the U.S. Geological Survey, people reported feeling the initial earthquake as far north as Trinidad and as far south as Victorville — more than 900 miles away.

Brenda Godsey, public information officer for the Humboldt County Sheriff’s Office, said her office received only one earthquake-related inquiry and no reports of injury or damage.

The Office of Emergency Services was not activated, said OES Program Coordinator Dan Larkin.

In situations like this, Larkin said, “there’s nothing we do, because there’s nothing we can do.”

Had the incident been serious, he said, any of a range of responses would have been triggered, possibly including an emergency declaration and the activation of the Emergency Alert System, as well as various local, state and federal emergency response protocols.

Humboldt State University geology professor Lori Dengler said the earthquakes were “of interest and a low level of excitement,” adding that the two events occurred along the Mendocino Fault, which is the region’s single most active fault.

“Since 1980, we’ve had about 150 earthquakes of magnitude 4 or larger along the Mendocino Fault,” she said.

Dengler described the fault as “kind of our Mason-Dixon Line. It really divides the West Coast of the United States into two completely different tectonic areas.”

To the south is the San Andreas Fault with its side-to-side “transform” movement. To the north are the Gorda and the Juan de Fuca plates that converge along the coast and dive down to create the vertical movement characteristic of the Cascadia Subduction Zone.

The Mendocino Fault itself, where Wednesday’s earthquakes occurred, moves horizontally, Dengler said.

“So if you had been standing south of the Mendocino Fault, and if there were no water in the ocean and you could have actually seen what was going on, you would have seen the land north of the fault move maybe half a foot closer to the coast,” she said.

But it could have been worse.

“In the 1906 earthquake, had you been on the San Andreas Fault and looked across to the other side, you would have seen it move more than 20 feet in some places,” she said.

Dengler has long said the North Coast is overdue for a damaging earthquake.

“The point I really like to make is that this is the time to take action to reduce your hazards. It can be something as simple as that huge potted plant on a bookshelf above your bed. Maybe there’s a better place for it. Develop an emergency plan for your family. Make sure your hot water heater is secured to a structural element of your house.

“They’re small things, but they can make a big difference.”


On shaky ground: Significant North Coast earthquakes of the past 30 years

+ June 14, 2005 6:50 p.m.
Magnitude 7.2, centered 97 miles west of Trinidad
Felt lightly but resulted in tsunami warning for the entire West Coast
No reports of injury or damage

+ Feb. 18, 1995 8:03 p.m.
Estimated magnitude 6.5, centered 80 miles west-southwest of Eureka
No reports of injury or significant damage

+ Dec 26, 1994 6:10 a.m.
The Eureka Earthquake
Estimated magnitude 5.4, centered 12 miles west-southwest of Eureka
Minor injuries reported and damages estimated at more than $2.3 million

+ Sept. 1, 1994 8:15 a.m.
The Mendocino Fault Earthquake
Estimated magnitude 6.9, centered approximately 90 miles west of Cape Mendocino
No reports of injury or significant damage

+ April 25, 1992 11:06 a.m.
The Ferndale Earthquake
Magnitude 7.1, centered near Petrolia
Followed by aftershocks of magnitude 6.6 and 6.7 near Cape Mendocino
Damage estimated at $60 million, resulted in federal disaster declaration

+ Sept. 17, 1991 12:29 p.m.
The Honeydew Earthquake
Estimated magnitude 6.1, centered 13 miles south-southeast of Cape Mendocino
More than 60 percent of Honeydew residents reported structural damage

+ Nov. 8, 1980 2:27 a.m.
The Trinidad Earthquake
Magnitude 7.1, centered 30 miles west of Trinidad
Freeway overpass south of Eureka collapsed
Regional damages estimated at $1.75 million

Source: Humboldt State University Geology Department’s Humboldt Earthquake Education Center

Remembering the 1984 Morgan Hill Earthquake

On April 24, 1984 at 1:15 p.m. PST, a 6.2 magnitude earthquake occurred on the Calaveras fault to the east of San Jose, California. This earthquake was felt over an area of approximately 120,000 km2 in California and western Nevada. The area of moderate damage ($8 million) extended southward from the epicenter rather than centering on the epicenter. This pattern indicates that the Morgan Hill earthquake may have been a double event with the second event being located about 17 km southeast of the main shock.

In Santa Clara County, where most of the damage occurred, more than 550 structures incurred minor damage. Major structural damage was mainly confined to a very small area on two streets of the Jackson Oaks subdivision located east of Morgan Hill (population 19,000). Five houses were condemned; two of these had fallen off their concrete foundations and suffered partial collapse. Several masonry buildings on Main Street in Morgan Hill were damaged and later condemned. Well-engineered industrial buildings and residential structures sustained only minor damage, but many mobile homes fell off their supports causing considerable damage to the furnishings inside. There were many reports of fires resulting from the quake. Minor damage also occurred at San Martin and Coyote. Twenty-seven people were injured.

Small Quake Hits off the Coast of Northern California

Associated Press - Petrolia, CA (April 6, 2007)

A small quake struck off the coast of Humboldt County on Thursday afternoon (4/5/07), but there were no immediate reports of injuries or damages.

The magnitude-4.1 earthquake struck at 3:54 p.m. and was centered about 40 miles southwest of Eureka and 206 miles northwest of Sacramento, according to the U.S. Geological Survey

There were no immediate reports of damage or injuries, according to a spokeswoman for the Humboldt County Sheriff's Department.

Solomon Islands: Six dead from tsunami

From the CNN

"At least six people died in the Solomon Islands Monday after two earthquakes and a tsunami hit the western part of the island-chain nation, the country's chief spokesman said.....

The United States Geological Survey said the first earthquake took place at 6:40 a.m. (2040 GMT on Sunday) and was centered 25 miles south-southeast of Gizo, New Georgia Islands, and 1,330 miles north-northeast of Brisbane, Australia.A second quake of 6.7 magnitude hit a few minutes later, according to the USGS. It was centered 75 miles west-southwest of Chirovanga, Choiseul, Solomon Islands, and 1,410 miles north of Brisbane, Australia.

The quakes led to a tsunami warning for a huge part of the Pacific. Australia and Indonesia were among the areas named in a warning from the Pacific Tsunami Warning Center, as were Papua New Guinea and several other islands in the region.A watch was issued for some other parts of the Pacific, including New Zealand, the Philippines, American Samoa, Guam and Fiji.

Initially, Hawaii was put under an advisory, but not a watch or warning. By evening, the advisory was lifted. The Solomon Islands are popular with international tourists. Most homes in the mountainous islands are constructed of timber and bamboo, with villagers relying on fishing and logging for employment."

earthquakes in April and May 2007

hi
pl watch folloeing dates for major earthquakes of more han 7.5 magnitude
8th, 24/25th april,28 th april 2007
2/3 rd and 10th May 2007
16th june 2007
13/14 th and 22nd August 2007
22 and 29th Dec 2007
pl watch these dates
regards
A.J.DAVE

Deadly Earthquake in Indonesia

A powerful earthquake has struck the Indonesian island of Sumatra, killing at least 70 people and flattening hundreds of buildings. The US Geological Survey said the quake had a magnitude of 6.3, and was centred near the town of Padang.

There are fears the death toll may be higher as many people are believed to have been trapped beneath rubble. The quake struck at 1049 local time (0349 GMT), causing panic among residents in western Sumatra.

A strong aftershock - magnitude 6.0 according to the US Geological Survey - struck two hours later causing further damage and panic.

An Indonesian government spokesman, Sudi Silalahi said 70 people had been killed.

Read BBC News for the full story.

EARTH QUAKE PREDICTION -THEORY AND DATES

SIR
pl find herewith my theory of earthquake prediction and the dates for probable earthquakes in the year 2007.
A.J.DAVE
amitjdave@yahoo.com
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