(Major) Earthquakes list August 27, 2012 - Massive earthquake far out of the El Salvador coast

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Moderate earthquake in the Gulf of California
Preliminary readings are showing that an earthquake occurred in the middle of the Gulf of California, some 70 km out of the Mexican coast

Massive earthquake along the coast of El Salvador ??
Preliminary Magnitude and depth : M7.4 @ 52.9 km
Approx. 125 km out of the coast
NOAA reports : BASED ON THE EARTHQUAKE MAGNITUDE... LOCATION AND HISTORIC TSUNAMI RECORDS A DAMAGING TSUNAMI IS NOT EXPECTED ALONG THE CALIFORNIA/ OREGON/ WASHINGTON/ BRITISH COLUMBIA AND ALASKA COASTS.
Max. wave height along the Central America coast : 0.1 meter or NO danger
NO people are living within a radius of 100 km
Important Update : Confusion in seismic land : The 3 main international agencies are reporting very conflicting numbers. Geofon reports a Magnitude of M6.6 and EMSC only a M5.2
Our attention was attracted to the fact that we had very few readers from Central America which is opposite on what we see otherwise. Hard to believe that a massive quake at 50 km at 125 km out of the coasr would not be felt by people on land.
The central american agencies are simply not reporting an earthquake at the time of occurrence. This data looks more and more being a hoax
Update : All the agencies are now showing 7+ magnitudes for the El Salvador earthquake, EMSC and Geofon even at shallower depths
Update 05:40 UTC : We are still confused about this massive earthquake as the local agencies still do not list it including El Salvador's SNET and as we had no abnormal number of Central American readers in the website
(Almost) Final update 06:47 : The mystery has finally been solved. SNET (El Salvador) has also listed the earthquake as an M6.7 earthquake at a depth of 50 km but more than 200 km out of the coast. Additionally, the hypocenter of the earthquake was located in the oceanic plate and not in the North American plate. This event was in other words an intra-plate event and not a subduction earthquake like most of the earthquakes are in the area.
Update 07:17 : A couple of 5+ aftershocks occurred in the greater epicenter area. USGS has located the epicenter of all events in the subduction zone below the continental plate while snet was putting it more into the ocean.
- To make the confusion complate, also USGS has now updated the hypocenter from a +50 km to a depth of 20.3 km.
- Ineter Nicaragua is reporting the mainshock as a Mc5.9!
Update 09:19 UTC : A new strong aftershock struck closer to the El Salvador coast.
Update 12:14 UTC : Tsunami calculations greatly depend upon the underlying earthquake parameters. In a first tsunami report GDACS based their calculations on a depth of 52.3 km (data according USGS preliminary report). A max. waveheight of 0.1 m was the result. After that USGS changed the depth of the hypocenter to 20.3 km a totally different calculation resulted in a max. wave pattern of 0.5 meter, a huge difference. As it was evening in the epicenter area, we guess that almost nobody would have seen the waves. This event is a reminder that seismology is not an exact science and has still a quiet important error margin.

Image courtesy GDACS

Image courtesy GDACS

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Refresh this list
SRC Location UTC Date/time M D INFO
USGS Gulf Of California Aug 27 23:16 5.0 10 MAP
EMSC Gulf Of California Aug 27 23:16 5.4 10 MAP
GEOFON Gulf Of California Aug 27 23:16 5.4 10 MAP
EMSC Off East Coast Of Honshu, Japan Aug 27 23:05 4.6 31 MAP
USGS Off The East Coast Of Honshu, Japan Aug 27 23:05 4.6 31 MAP
EMSC Offshore El Salvador Aug 27 22:07 4.8 30 MAP
USGS Offshore El Salvador Aug 27 22:07 4.8 35 MAP
USGS Off The Coast Of Central America Aug 27 21:13 4.8 35 MAP
EMSC Off Coast Of Central America Aug 27 21:13 4.7 46 MAP
GEOFON Off Coast Of Central America Aug 27 21:13 4.7 46 MAP
USGS Kepulauan Talaud, Indonesia Aug 27 17:54 5.3 19 MAP
EMSC Kepulauan Talaud, Indonesia Aug 27 17:54 5.1 40 MAP
GEOFON Talaud Islands, Indonesia Aug 27 17:54 5.2 46 MAP
GEOFON Kermadec Islands Region Aug 27 16:00 5.0 10 MAP
USGS Kermadec Islands Region Aug 27 16:00 5.0 39 MAP
EMSC Kermadec Islands Region Aug 27 16:00 5.0 40 MAP
USGS Off The Coast Of Central America Aug 27 14:36 4.6 35 MAP
EMSC Off Coast Of Central America Aug 27 14:36 4.7 20 MAP
USGS Offshore El Salvador Aug 27 12:55 4.6 20 MAP
EMSC Andaman Islands, India Region Aug 27 12:05 5.0 48 MAP
USGS Andaman Islands, India Region Aug 27 12:05 5.0 45 MAP
GEOFON Andaman Islands, India Region Aug 27 12:05 5.0 47 MAP
USGS Off The Coast Of El Salvador Aug 27 10:59 4.7 20 MAP
EMSC Off The Coast Of El Salvador Aug 27 10:59 4.7 20 MAP
GEOFON Off Coast Of Central America Aug 27 09:05 4.9 35 MAP
EMSC Near Coast Of Nicaragua Aug 27 09:05 5.1 20 MAP
USGS Near The Coast Of Nicaragua Aug 27 09:05 5.1 20 MAP
EMSC Northern Sumatra, Indonesia Aug 27 09:01 5.2 157 MAP
GEOFON Northern Sumatra, Indonesia Aug 27 09:01 5.1 144 MAP
USGS Northern Sumatra, Indonesia Aug 27 09:01 5.3 151 MAP
USGS Offshore El Salvador Aug 27 08:16 4.6 35 MAP
EMSC Off The Coast Of El Salvador Aug 27 08:14 4.7 20 MAP
EMSC Offshore El Salvador Aug 27 08:05 4.7 20 MAP
GEOFON Off Coast Of Central America Aug 27 08:05 4.6 10 MAP
USGS Off The Coast Of El Salvador Aug 27 08:05 4.7 35 MAP
USGS Off The Coast Of El Salvador Aug 27 07:47 4.7 35 MAP
EMSC Off The Coast Of El Salvador Aug 27 07:47 4.6 20 MAP
GEOFON Kuril Islands Aug 27 06:37 4.6 60 MAP
EMSC Kuril Islands Aug 27 06:37 4.6 66 MAP
EMSC Offshore El Salvador Aug 27 05:38 5.3 20 MAP
USGS Offshore El Salvador Aug 27 05:38 5.4 20 MAP
GEOFON Off Coast Of Central America Aug 27 05:38 5.1 45 MAP
GEOFON Gulf Of California Aug 27 05:23 5.5 10 MAP
USGS Gulf Of California Aug 27 05:23 5.2 10 MAP
EMSC Gulf Of California Aug 27 05:23 5.2 10 MAP
USGS Off The Coast Of El Salvador Aug 27 05:01 4.6 19 MAP
EMSC Off The Coast Of El Salvador Aug 27 05:01 4.6 20 MAP
GEOFON Off Coast Of Central America Aug 27 04:53 5.0 25 MAP
USGS Offshore El Salvador Aug 27 04:53 4.8 20 MAP
EMSC Offshore El Salvador Aug 27 04:53 4.8 20 MAP
EMSC Southern California Aug 27 04:41 4.9 10 MAP
  • Chula Vista - Lying in bed & felt shaking that went on for at least 6 seconds
  • USGS Southern California Aug 27 04:41 4.9 9 MAP
  • Dowtown San Diego - felt the swey on the 9th floor
  • GEOFON Calif.-baja Calif. Border Region Aug 27 04:41 5.1 10 MAP
    EMSC Offshore El Salvador Aug 27 04:37 5.2 40 MAP
    GEOFON Off Coast Of Central America Aug 27 04:37 7.3 15 MAP
    EMSC Offshore El Salvador Aug 27 04:37 7.4 25 MAP
    USGS Offshore El Salvador Aug 27 04:37 7.3 20 MAP
    USGS Off The Coast Of El Salvador Aug 27 04:37 7.4 50 MAP
    EMSC Luzon, Philippines Aug 27 04:28 4.7 51 MAP
  • Vintar Ilocos Norte Philippines - Moderate shaking reported
  • GEOFON Philippine Islands Region Aug 27 04:28 4.9 10 MAP
    EMSC Molucca Sea Aug 27 03:47 5.1 100 MAP
    GEOFON Northern Molucca Sea Aug 27 03:47 5.2 76 MAP
    USGS Molucca Sea Aug 27 03:47 5.0 82 MAP
    USGS Antofagasta, Chile Aug 27 00:39 5.1 57 MAP
    EMSC Antofagasta, Chile Aug 27 00:39 5.1 50 MAP
    GEOFON Northern Chile Aug 27 00:39 5.1 64 MAP

    Data sources courtesy : USGS - EMSC - GFZ - GEONET

    Earthquakes occurred yesterday (UTC time), but today local time

    Halmahera, Indonesia Aug 26 23:06 PM M 5.0 44.6

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