At 4:02am, on Wednesday morning, a 3.1 magnitude earthquake hit 6 miles southeast of Ocotillo, California. The earthquake occurred just north of the Mexican border, in the desert, and is possibly related either to the Yuha Wells Fault or the extreme northern edge of the Laguna Salada Fault. The earthquake appears to be an aftershock of the 7.2 Baja earthquake sequence.
A 1.9 magnitude aftershock was detected just two minutes later.
The 3.1 magnitude earthquake was not reported as felt by anyone to the USGS.
The epicenter of the 3.1 quake is located in the desert where no major towns are immediately nearby. Due to the minor magnitude and rural terrain, no damage or injuries are expected.
The closest communities are Ocotillo, Ocotillo Wells, Jacumba, Seeley, Calixico, Mexicali, Santa Isabel, El Centro, Brawley, Plaster City, and the closest major US city is San Diego.
[Magnitudes and locations are subject to change as the USGS reviews the automated data.]
Showing posts with label baja california. Show all posts
Showing posts with label baja california. Show all posts
At 11:10am, on Thursday morning, a 4.1 magnitude earthquake hit 6 miles east southeast of Ocotillo, California. The earthquake occurred just north of the Mexican border, in the desert, and is possibly related either to the Yuha Wells Fault or the extreme northern edge of the Laguna Salada Fault. The earthquake appears to be an aftershock of the 7.2 Baja earthquake sequence.
Earlier in the morning, a 3.2 earthquake occurred near Anza and a 3.1 earthquake occurred near Salton City, California. These three earthquakes occurred within 10 hours of each other and, two months after the Baja quake, this is showing signs that seismic activity in the region is not going quiet just yet.
The 4.1 magnitude earthquake was felt as far north as Palm Springs, as far northwest as Irvine, as far west as San Diego, as far east as Mexicali, and south into Mexico.
The epicenter of the 4.1 quake is located in the desert where no major towns are immediately nearby. Due to the moderate magnitude and rural terrain, no damage or injuries are expected.
[Magnitudes and locations are subject to change as the USGS reviews the automated data.]
Earlier in the morning, a 3.2 earthquake occurred near Anza and a 3.1 earthquake occurred near Salton City, California. These three earthquakes occurred within 10 hours of each other and, two months after the Baja quake, this is showing signs that seismic activity in the region is not going quiet just yet.
The 4.1 magnitude earthquake was felt as far north as Palm Springs, as far northwest as Irvine, as far west as San Diego, as far east as Mexicali, and south into Mexico.
The epicenter of the 4.1 quake is located in the desert where no major towns are immediately nearby. Due to the moderate magnitude and rural terrain, no damage or injuries are expected.
[Magnitudes and locations are subject to change as the USGS reviews the automated data.]
At 7:50am, on Saturday morning, a 3.8 magnitude earthquake hit 7 miles east southeast of Ocotillo, California. This appears to be continued stress from the 7.2 magnitude Baja quake of April 4th. It may be related to the extreme north end of the Laguna Salada Fault, or more than likely the quake relates to the Yuha Wells Fault.
This local region has gone relatively quiet, however, this is the first 3.0+ magnitude quake in the area immediately north of the border of Mexico since the 4.2 magnitude earthquake that struck 12 miles southeast of Ocotillo at 5:21am on May 24th.
15 minutes after the 3.8, no damage or felt reports were posted to the USGS. The epicenter is located in the desert. No damage or injuries are expected.
[Magnitudes and locations are subject to change as the USGS reviews the automated data.]
This local region has gone relatively quiet, however, this is the first 3.0+ magnitude quake in the area immediately north of the border of Mexico since the 4.2 magnitude earthquake that struck 12 miles southeast of Ocotillo at 5:21am on May 24th.
15 minutes after the 3.8, no damage or felt reports were posted to the USGS. The epicenter is located in the desert. No damage or injuries are expected.
[Magnitudes and locations are subject to change as the USGS reviews the automated data.]
At 8:52 pm, a 3.6 magnitude earthquake hit 11 miles west southwest of downtown San Diego.
At 8:57pm, a 4.3 magnitude earthquake hit 38 miles southwest of Imperial Beach.
Both earthquakes hit 5 minutes apart and both were off the coast of downtown San Diego. This is a change in activity as both quakes occurred far from the Baja aftershock sequence. There were no immediate reports of damage or injuries and none would be expected due to the moderate to low magnitude of both quakes.
The magnitudes and locations are subject to change as the USGS reviews that data.
The last earthquake in this region was a 3.5 magnitude quake 36 miles southwest of Rosarito, Mexico, on March 24, 2010.
Before that, there was also a 4.4 and two 3.6 magnitude earthquakes between February 1st and February 3rd earlier this year in the same general location off the coast.
At 8:57pm, a 4.3 magnitude earthquake hit 38 miles southwest of Imperial Beach.
Both earthquakes hit 5 minutes apart and both were off the coast of downtown San Diego. This is a change in activity as both quakes occurred far from the Baja aftershock sequence. There were no immediate reports of damage or injuries and none would be expected due to the moderate to low magnitude of both quakes.
The magnitudes and locations are subject to change as the USGS reviews that data.
The last earthquake in this region was a 3.5 magnitude quake 36 miles southwest of Rosarito, Mexico, on March 24, 2010.
Before that, there was also a 4.4 and two 3.6 magnitude earthquakes between February 1st and February 3rd earlier this year in the same general location off the coast.
A moderately strong 5.8 earhtquake struck the California/Mexico border near Calexico at 10:48am (Local time) on December 30, 2009. The quake was felt widely throughout Southern California, Northern Baja and Southern Arizona.
The quake Was felt as far away as Los Angeles and Phoenix.
Reports of damage or injuries have not come in yet. However, a quake of this size could cause local damage.
The quake occurred 30 miles south east of the heavily populated Calexico/Mexicali area. Quakes in this area are not uncommon. Quakes of 5.0+ have have struck this in recent years.
As of 30 minutes after the quake, there have been a number of sizable aftershocks including a 4.9 at 10:53, and a 4.0 at 11:07.
The quake Was felt as far away as Los Angeles and Phoenix.
Reports of damage or injuries have not come in yet. However, a quake of this size could cause local damage.
The quake occurred 30 miles south east of the heavily populated Calexico/Mexicali area. Quakes in this area are not uncommon. Quakes of 5.0+ have have struck this in recent years.
As of 30 minutes after the quake, there have been a number of sizable aftershocks including a 4.9 at 10:53, and a 4.0 at 11:07.
The sequence of earthquakes coming out of Northern Baja is quite impressive and is not showing any signs of slowing down. It resembles an aftershock sequence you might see after a 6+ earthquake. But there was no 6+ earthquake. In fact, the quake which started this was only a 5.4.
The quake was originally posted as a 5.4 and later downgraded to a 5.1. There is still some debate over the true magnitude of this quake. It will take some time to determine the actual magnitude. It should be somewhere between 5.1 and 5.5.
As of the time of this report the 5.4 quake has been followed by at least 35 aftershocks with a magnitude of 3.0 or greater. Five have been greater than 4.0 and two have been 5.0 or greater. In total there have been over 200 aftershocks.
How does this compare with previous quakes in the area? Data from previous years shows that in May of 2006 a 5.4 earthquake produced 16 aftershocks of 3.0 or greater. In February of 2002 a 5.7 quake in the same area produced nearly fifty 3.0+ aftershocks.
The question that I'm sure everyone is asking is whether something bigger and more destructive is on the way. Nobody can say for sure. The 5.7 quake in 2002 was preceded by increased seismic activity which started in December of 2001.
It is always best to be prepared. Plan as if a stronger quake is on the way. Make sure you are prepared by having a supply of bottled water and non-perishable food. Always sleep with a pair of shoes and a flash light near your bed. Make sure there are no loose items or furniture that could fall and hurt someone.
It's a good idea to always be prepared. The mainshock is usually the largest and most destructive, and waiting until after the mainshock to get prepared is a bad idea.
Here is a link for more tips on how to prepare for an earthquake and what to do after one strikes.ALWAYS BE PREPARED
Here is our latest image showing the region affected by these quakes (click on it to enlarge):
The quake was originally posted as a 5.4 and later downgraded to a 5.1. There is still some debate over the true magnitude of this quake. It will take some time to determine the actual magnitude. It should be somewhere between 5.1 and 5.5.
As of the time of this report the 5.4 quake has been followed by at least 35 aftershocks with a magnitude of 3.0 or greater. Five have been greater than 4.0 and two have been 5.0 or greater. In total there have been over 200 aftershocks.
How does this compare with previous quakes in the area? Data from previous years shows that in May of 2006 a 5.4 earthquake produced 16 aftershocks of 3.0 or greater. In February of 2002 a 5.7 quake in the same area produced nearly fifty 3.0+ aftershocks.
The question that I'm sure everyone is asking is whether something bigger and more destructive is on the way. Nobody can say for sure. The 5.7 quake in 2002 was preceded by increased seismic activity which started in December of 2001.
It is always best to be prepared. Plan as if a stronger quake is on the way. Make sure you are prepared by having a supply of bottled water and non-perishable food. Always sleep with a pair of shoes and a flash light near your bed. Make sure there are no loose items or furniture that could fall and hurt someone.
It's a good idea to always be prepared. The mainshock is usually the largest and most destructive, and waiting until after the mainshock to get prepared is a bad idea.
Here is a link for more tips on how to prepare for an earthquake and what to do after one strikes.ALWAYS BE PREPARED
Here is our latest image showing the region affected by these quakes (click on it to enlarge):
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.
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.
A strong earthquake with a preliminary magnitude of 6.7 has hit the Gulf of California, about 435 miles south of San Diego.
The quake struck at 12:32 AM (1/4/06) Pacific Coast time and was preceded by a series of at least three quakes that registered over 4.0 on the Richter scale.
It is still too soon for reports of damage or injuries, but the quake did occur within 75 miles of some populated areas.
01:40AM (1/4/05)
The following is a release by the United States Geological Survey, National Earthquake Information Center: A strong earthquake occurred 90 km (55 miles) NNE of Santa Rosalia, Baja Calif. Sur, Mexico and 1620 km (1010 miles) NW of MEXICO CITY, D.F., Mexico at 1:32 AM MST, Jan 4, 2006 (1:32 AM MST in Mexico). The magnitude and location may be revised when additional data and further analysis results are available. There have been no reports of damage.
The quake struck at 12:32 AM (1/4/06) Pacific Coast time and was preceded by a series of at least three quakes that registered over 4.0 on the Richter scale.
It is still too soon for reports of damage or injuries, but the quake did occur within 75 miles of some populated areas.
01:40AM (1/4/05)
The following is a release by the United States Geological Survey, National Earthquake Information Center: A strong earthquake occurred 90 km (55 miles) NNE of Santa Rosalia, Baja Calif. Sur, Mexico and 1620 km (1010 miles) NW of MEXICO CITY, D.F., Mexico at 1:32 AM MST, Jan 4, 2006 (1:32 AM MST in Mexico). The magnitude and location may be revised when additional data and further analysis results are available. There have been no reports of damage.
Those that study patterns of small earthquakes to help predict the next significant earthquake may want to take a look at Northern Baja California. The area in question is located about 45-50 south of the California border in central Baja California.
I have noted an area where five quakes have occurred over the last few weeks. I have compiled a 25-year list of earthquakes that have occurred within a 15 mile (26.5 km) radius of where these quakes have occurred. (NOTE: All quakes referenced in this report are of 3.0 or greater)
This area has a rich seismic history, but has been very quiet in recent years. Prior to these recent quakes, a 3.0 was recorded on December 13th of 2004.
This area has seen four earthquakes of 5.0 or higher in the last 25 years. The most recent was a 5.0 on 12/3/91. The other three were all 5.1 and they occurred on 8/31/88, 1/25/88 and 5/8/85. Three of the four had at least one notable foreshock.
The 5.0 of 12/3/91 had two quakes within about six weeks
of the mainshock, but calling these foreshocks might be a stretch based on this data.
The 5.1 of 8/31/88 had a 3.3 foreshock four days prior and a two other small 3's within a few weeks.
The 5.1 of 1/25/88 saw seventeen foreshocks. Activity increased in August of 1987 and four significant foreshocks occurred within the month prior to the mainshock. Before August, the last quake was back at the end of January.
On May 8, 1985 there was a 3.3 foreshock followed by a 5.1 mainshock about two hours later.
Although having 4 quakes in this area in a short period of time is not unprecedented, it is something to keep an eye on. Larger quakes here tend to have foreshocks.
HERE is the complete list of quakes that was used for this report.
I have noted an area where five quakes have occurred over the last few weeks. I have compiled a 25-year list of earthquakes that have occurred within a 15 mile (26.5 km) radius of where these quakes have occurred. (NOTE: All quakes referenced in this report are of 3.0 or greater)
This area has a rich seismic history, but has been very quiet in recent years. Prior to these recent quakes, a 3.0 was recorded on December 13th of 2004.
This area has seen four earthquakes of 5.0 or higher in the last 25 years. The most recent was a 5.0 on 12/3/91. The other three were all 5.1 and they occurred on 8/31/88, 1/25/88 and 5/8/85. Three of the four had at least one notable foreshock.
The 5.0 of 12/3/91 had two quakes within about six weeks
of the mainshock, but calling these foreshocks might be a stretch based on this data.The 5.1 of 8/31/88 had a 3.3 foreshock four days prior and a two other small 3's within a few weeks.
The 5.1 of 1/25/88 saw seventeen foreshocks. Activity increased in August of 1987 and four significant foreshocks occurred within the month prior to the mainshock. Before August, the last quake was back at the end of January.
On May 8, 1985 there was a 3.3 foreshock followed by a 5.1 mainshock about two hours later.
Although having 4 quakes in this area in a short period of time is not unprecedented, it is something to keep an eye on. Larger quakes here tend to have foreshocks.
HERE is the complete list of quakes that was used for this report.
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