Mexico – M 6.1 – Strong seaquake at a safe distance of Puerto Vallarta and Manzanillo

Fault zones of the Mexico August 24, 2010 earthquake - courtesy EMSC

Earthquake Report comment :
A strong shallow seaquake struck right on the fault line where the Pacific plate and the smaller Cocos plate collide.  The epicenter was though on a safe distance of almost 300 km out of the Mexican coast.
The earthquake was felt by some as a weak shaking, with of course no damage or injuries.
In this area, it is not the main fault line where today’s earthquake occurred (collision of Pacific and Cocos plate) which causes the highest risk, but the fault line closer to the coast where the Cocos plate and/or the smaller Rivera plate subducts under the North American plate (the steep sea ridge can clearly be seen on the Google satellite map and on the above fault line map). The biggest movement comes from the Cocos plate who travels at a rate of 40 mm/year under the North American plate.

On January 22, 2003 a large massive earthquake struck the coastal waters only 50 km from Manzanillo. This earthquake was also called the Colima earthquake (area name).
At least 29 people killed, 300 injured, about 10,000 homeless, 2,005 houses destroyed and 6,615 damaged. Most of the deaths and damage occurred in the Villa de Alvarez-Colima area. Extensive damage (VIII) at Colima and Tecoman.
Landslides closed a segment of the Colima-Guadalajara Highway and the port at Manzanillo.  A local tsunami of about 1 m  was recorded at Manzanillo.

Seismogram of the August 24, 2010 earthquake in the Pacific Ocean near the Mexican coast

The most deadly earthquake in the region occurred about 170 km to the south-east on September 19, 1985. This magnitude 8.0 earthquake (also called the Michoacan earthquake) killed at least 9,500 people, injured about 30,000, and left 100,000 people homeless.

Most important Earthquake Data:
Monday, August 23, 2010 at 07:12:00 PM at epicenter
Depth (Hypocenter) : 10 km
Geo-location(s) :
290 km (180 miles) SW of Puerto Vallarta, Jalisco, Mexico
315 km (195 miles) W of Manzanillo, Colima, 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 Shaking map
USGS historic earthquakes map
GDACS Green Earthquake Alert (Global Disaster Alert and Coordination System)

* GDACS (Global Disaster Alert and Coordination System) provides near real-time alerts about natural disasters around the world.  GDACS is a Joint Initiative of the United Nations and the European Commission

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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