Powerful earthquake near Salina Cruz, Mexico (Oaxaca)

Earthquake Report comment :
Epicenter of the earthquake is only 40 km from the town of Salina Cruz in the province of Oaxaca.
De pending on the data source the hypocenter of this earthquake is located in between 10 km and 58 km (a big difference).
Salina Cruz has a population of 73,468 (latest census).
San Mateo de Mar, even a little closer to the epicenter, has a population of 5,441.
Both populated centers lie in the immediate vicinity of the subduction zone where the Cocos plate is diving under the Caribbean plate, thus creating a dangerous earthquake zone.
This area has regular earthquakes and people are used to shocks from time to time. Earthquake-Report.com predicts no damage or injuries from this earthquake, although every earthquake can be felt differently.
This earthquake is hardly reported by the Mexican press. All the spots are still on the aftermath of tropical storm “Karl” who is claiming at least 18 victims.

Image of Salina Cruz Bay, the biggest and most...

Salina Cruz - Image via Wikipedia

Wikipedia info on Salina Cruz :
Salina Cruz is a major seaport on the Pacific coast of the Mexican state of Oaxaca. It is the state’s third-largest city and is municipal seat of the municipality of the same name. It is part of the Tehuantepec District in the west of the Istmo Region. The city had a 2005 census population of 71,314 persons, while its municipality, with an area of 113.55 km² (43.84 sq mi) had a population of 76,219, the state’s fourth-largest municipality in population. The port expanded in the late 19th century due to its location at the southern terminus of the Tehuantepec National Railway, which carried freight across the Isthmus of Tehuantepec. It is situated near the mouth of the Río Tehuantepec, on the open coast of the Isthmus of Tehuantepec, and has no natural harbour. There was only a small Native American village before Salina Cruz was chosen as the Pacific terminus of the railway, whereupon a modern town was laid out and built on adjacent higher ground.

Most important Earthquake Data (preliminary):
Magnitude :  MW 5.1 (EMSC Mb 5.2)
Tuesday, September 21, 2010 at 09:42:13 AM at epicenter
Depth (Hypocenter) : 58 km (EMSC gives a shallow depth of 14 km!)
Geo-location(s) :
39 km (24 miles) ESE (122°) from Salina Cruz, Oaxaca, Mexico (23 km by EMSC)
52 km (32 miles) SSE (164°) from Juchit�n, Oaxaca, Mexico

Links to important maps
USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS historic earthquakes map

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

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Earthquakes list September 15, 2010

M 4.2    2010-09-15   19:57     Depth 14 km    CENTRAL IRAN
Weak shallow earthquake near Abadi ye Pa Godaru

M 5.0      2010/09/15 18:42    Depth 89.7 km MINDANAO, PHILIPPINES
This rather deep earthquake is not dangerous. Epicenter at the entrance of the Davao Gulf  at a distance of approx. 100 km from General Santos

M 5.0      2010/09/15 16:06    Depth 100.0 km     SOUTHERN ALASKA
Deep harmless earthquake in a wilderness area in Lake Clark Park and Wilderness.

M 4.5      2010/09/15 14:31    Depth 10.5 km      NEAR THE WEST COAST OF COLOMBIA
15 km from Arusi peninsula and close to the Ensenada de Utria National Park.  Not dangerous.

M 4.7      2010/09/15 13:48    Depth 563.9 km     FIJI REGION
Another deep  seaquake 5 seconds after the former listed quake and with an epicenter almost on the same spot.

M 4.7      2010/09/15 13:43    Depth 584.8 km      FIJI REGION
Deep seaquake with a distant Ono-i-Lau volcanic and Coral island as the closest populated part of Fiji.

M 4.6      2010/09/15 13:03    Depth 27.5 km      UNIMAK ISLAND REGION, ALASKA
Epicenter on the subduction slopes of the Aleutian trench, in a area where a lot of earthquakes occurred the last few weeks.

M 4.9      2010/09/15 12:29    Depth 45.4 km      OFFSHORE NAYARIT, MEXICO
Aftershock from yesterday’s powerful M 5.9 earthquake. Epicenter almost on the same spot as yesterday and about 15 km to the south of the unpopulated Isla Maria Cleafas.

M 4.9      2010/09/15 12:10    Depth 9.9 km      SOUTHEAST INDIAN RIDGE

Moderate seaquake but also a beautiful example of a transform fault. The stress lines from the plates can be seen very well on the satellite picture

M 4.2      2010/09/15 08:21    Depth 10.0 km GULF OF CALIFORNIA
Third shock 8 seconds after the M 4.4 shock, in the middle of the peninsula

M 4.4      2010/09/15 08:13    Depth 10.0 km
GULF OF CALIFORNIA
Second shock only 2 minutes later, but under the peninsula

M 4.4      2010/09/15 06:46    Depth 10.0 km      GULF OF CALIFORNIA
Light earthquake in the coastal waters of the Baja California peninsula. The whole area is very active the last couple of days.

M 4.7      2010/09/15 06:09    Depth 0.4 km     BAJA CALIFORNIA, MEXICO
Please also read the detailed page of this earthquake – Click here

M 5.1      2010/09/15 06:05    Depth 96.1 km     CHIAPAS, MEXICO

Moderate but fairly deep and harmless earthquake near San Juan Custepeque , Chiapas Mexico

seismograph - recordingUseful information to read this daily earthquake list
This earthquake list covers minor and major earthquakes in the world.
If a more detailed page is present, the earthquake line will be linked to the detailed page.
For your comfort, we will provide in most cases Google Satellite Map links to give you an idea where the earthquake struck, which terrain it happened and if villages or cities are located in the immediate vicinity. The reference for the time zone is UTC (Coordinated Universal Time, also called GMT)
The page is regularly updated to add new earthquakes.
green color = NOT dangerous for damage or injuries
orange color = MODERATE risk for damage or injuries
red color = CONSIDERABLE risk for damage or injuries

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

Heavy Aftershock in Baja California and the USA – Mexico border region

Mexicali at night

Mexicali at night - Image via Wikipedia

Earthquake Report comment :
The powerful aftershock occurred in the middle of the night.
The epicenter of this aftershock (earthquake) is in the same area than the M 7.2 main shock from April 4, 2010. Since that date a number of sometimes very powerful aftershocks have been hammering the border area.
Earthquake report does not think that there will be a lot of damage or injuries as people in this area have very strong building rules and have witnessed much stronger earthquakes the last few months.
Maximum shaking will be moderate to strong in the unpopulated epicenter area. Weak to light in the greater region.
Inhabitants of Tijuana and San Diego will have merely slept through it, with only light sleepers as witnesses from this aftershock.
Mercalli Intensities felt in various towns (in line with our predictions) :
Guadalupe Victoria : V (Moderate)
Greater Mexicali area : III (Weak to light)
San Diego and Tijuana : II to III (Weak)
The current epicenter is less than 20 km away from the April 4 earthquake epicenter and will probably be coming from the same fault line.
Click here for a picture of the sand dunes of the Laguna Salada landscape, extraordinary beautiful!. The Laguna Salada is part of the Yuha desert, where the earthquake epicenter is located.

Most important Earthquake Data:
Magnitude :  Ml 5.4
Tuesday, September 14, 2010 at 03:52:17 AM at epicenter
Depth (Hypocenter) : 11.5  km
Geo-location(s) (after recalculation) :
60 km (35 miles) SW of San Luis Rio Colorado, Sonora, Mexico
80 km (50 miles) SSE of Mexicali, Baja California, Mexico
95 km (60 miles) SSE of El Centro, California

Links to important maps
USGS Did You Feel It Map

Google satellite map of the area showing the kind of terrain the earthquake took place
USGS Shaking map

USGS Pager map

Seismograph of the event on nearby stations

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

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