Magnitude 6.3 – Revilla Gigedo Island region, Mexico

Strong and shallow magnitude 6.3 earthquake struck Revilla Gigedo Island region at 12:32:00 UTC 227 km (141 miles) NE of Socorro Island, 333 km (206 miles) SSE of Cabo San Lucas, Baja Calif. Sur, 419 km (260 miles) W of Puerto Vallarta, Jalisco, Mexic0 (19.891°N, 109.216°W) according to USGS, at depth of 5 km (3.1 miles). EMSC registered 5.6 magnitude at depth of 30km.

Satellite map of the greater epicenter area

The Revillagigedo Islands  or Revillagigedo Archipelago are a group of four volcanic islands in the Pacific Ocean, known for their unique ecosystem. They have been part of Manzanillo municipality of the Mexican state of Colima since 1861, but are nevertheless under Mexican federal jurisdiction, and lie 386 km southwest of Cabo San Lucas, the southern tip of Baja California peninsula, and between 720 and 970 km west of Manzanillo.

The Revillagigedo Islands are one of three Mexican island groups in the Pacific Ocean that are not on the continental shelf; the others are Guadalupe Island and Rocas Alijos.

There were no tsunami alert issued.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS



 ORIGIN TIME -  1232Z 01 NOV 2011

 COORDINATES -  20.0 NORTH  109.2 WEST

 DEPTH       -   10 KM

 LOCATION    -  REVILLA GIGEDO ISLANDS REGION

 MAGNITUDE   -  6.5



EVALUATION



 NO DESTRUCTIVE WIDESPREAD TSUNAMI THREAT EXISTS BASED ON

 HISTORICAL EARTHQUAKE AND TSUNAMI DATA.



 HOWEVER - EARTHQUAKES OF THIS SIZE SOMETIMES GENERATE LOCAL

 TSUNAMIS THAT CAN BE DESTRUCTIVE ALONG COASTS LOCATED WITHIN

 A HUNDRED KILOMETERS OF THE EARTHQUAKE EPICENTER. AUTHORITIES

 IN THE REGION OF THE EPICENTER SHOULD BE AWARE OF THIS

 POSSIBILITY AND TAKE APPROPRIATE ACTION.