Massive earthquake M 7.6 struck off the Philippines coast

Massive earthquake M 7.6 struck off the Philippines coast

A massive earthquake with recorded magnitude of 7.6 struck Philippine Islands region on August 31, 2012 at 12:47 UTC. USGS first reported M7.9 then downgraded to M7.6. Recorded depth was 34.9 km (21.7 miles) according to USGS. EMSC first reported M8.1, now is also reporting M7.6 but there is difference in depth. They measured depth of 20 km. Epicenter was located 94 km (58 miles) E of Sulangan, Philippines at coordinates 10.838°N, 126.704°E.

In next 90 minutes there were 6 strong M5+ aftershocks recorded by EMSC.

The head of the Philippine seismology agency, Renato Solidum, said his bureau had initially recorded a magnitude of 7.7.

GDACS reports this earthquake can have a low humanitarian impact based on the magnitude and the affected population and their vulnerability. About 13000 people live within 100km.

The tsunami warning has already been lifted for Japan and Taiwan and several other Pacific state and islands, though it remains in effect for Indonesia and the Philippines.

Mr. Solidum said that residents living along the coastline of eastern Samar Island, which was some 66 miles from the quake's epicenter, had been advised to evacuate to high ground in case of the tsunami.

Affected locations - Source GDACS

DateNameCountryTsunami wave height (m)
30 Sep 2012 13:55:00BurgosPhilippines  1.1m
30 Sep 2012 13:55:00SapaoPhilippines  1.1m
30 Sep 2012 13:55:00AlegriaPhilippines  1.1m
30 Sep 2012 13:59:00Cagosoan PtPhilippines  1.1m
30 Sep 2012 14:05:00HomonhonPhilippines  1.1m
30 Sep 2012 13:55:00LibertadPhilippines  1.1m
30 Sep 2012 13:55:00PilarPhilippines  1.1m
30 Sep 2012 13:55:00CaridadPhilippines  1.1m
30 Sep 2012 13:55:00San IsidroPhilippines  1.1m
30 Sep 2012 13:55:00BeilonPhilippines  1.1m
30 Sep 2012 13:55:00BarasPhilippines  1.0m
30 Sep 2012 13:55:00GuiuanPhilippines  1.0m
30 Sep 2012 13:57:00San BenitoPhilippines  1.0m
30 Sep 2012 13:55:00General LunaPhilippines  1.0m

Tsunami wave - JRC


USGS report

Magnitude7.6
Date-Time
  • Friday, August 31, 2012 at 12:47:34 UTC
  • Friday, August 31, 2012 at 08:47:34 PM at epicenter
Location10.838°N, 126.704°E
Depth34.9 km (21.7 miles)
RegionPHILIPPINE ISLANDS REGION
Distances94 km (58 miles) E of Sulangan, Philippines
106 km (65 miles) ESE of Guiuan, Philippines
161 km (100 miles) ESE of Borongan, Philippines
174 km (108 miles) NE of Surigao, Philippines
Location Uncertaintyhorizontal +/- 13.3 km (8.3 miles); depth +/- 2.8 km (1.7 miles)
ParametersNST=688, Nph=688, Dmin=435.3 km, Rmss=0.98 sec, Gp= 11°,
M-type=(unknown type), Version=A
Source
  • Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
Event IDusc000cc5m

 



Aftershocks:

By 14:42 UTC - EMSC reported 6 aftershocks in the same region:

1. 13:14 UTC – Magnitude 5.5 at depth of 10 km
2. 13:27 UTC – Magnitude 5.5 at depth of 30 km
3. 13:31 UTC - Magnitude 5.4 at depth of 10 km
4. 13:36 UTC – Magnitude 5.1 at depth of 117 km
5. 13:40 UTC - Magnitude 5.3 at depth of 60 km
6. 14:15 UTC - Magntude 5.0 at depth of 15 km

By the same time USGS reported 4 aftershocks:

1. 13:14 UTC - Magnitude 5.5 at depth of 24.3 km
2. 13:27 UTC - Magnitude 5.4 at depth of 35.0 km
3. 13:36 UTC - Magnitude 4.8 at depth of 20.6 km
4. 13:40 UTC - Magnitude 5.4 at depth of  48 km

 

Last 5 days overview:

In last 5 days there were 4 very strong earthquakes. Check our Seismic activity monitor to follow world earthquakes on live map along with reports from different agencies:

(1) August 26 - M6.6 Molucca Sea
(2) August 27 - M7.4 offshore El Salvador
(3) August 30 - M 6.7 Jan Mayen Island
(4) August 31 - M 7.6 Philippines


Update:


Unfortunately this earthquake turned out to be deadly. A house collapsed via a landslide in Southern Cagayan de Oro city on the South Island of Mindanao killing a 54-year-old woman and injuring her 5-year old grandson.


The quake knocked out power in several other towns and cities across the central and southern Philippines, though it was restored in some areas later Friday.

Aftershocks and following world earthquakes by 20:06 UTC reported by USGS:
 5.3  2012/08/31 18:38:55  13.257  50.45610.2 GULF OF ADEN
 5.0  2012/08/31 18:37:47  2.651  -95.23510.0 GALAPAGOS ISLANDS REGION
 5.2  2012/08/31 18:21:35  -4.981  151.86777.4 NEW BRITAIN REGION, PAPUA NEW GUINEA
 4.9  2012/08/31 18:01:57  13.142  50.48410.0 GULF OF ADEN
2.72012/08/31 17:58:09  38.999 -122.1368.1 NORTHERN CALIFORNIA
 5.0  2012/08/31 17:00:35 -55.770  -27.55435.4 SOUTH SANDWICH ISLANDS REGION
 5.1  2012/08/31 16:55:09  11.022  126.71414.0 PHILIPPINE ISLANDS REGION
 4.8  2012/08/31 15:47:38  13.225  50.45610.0 GULF OF ADEN
 4.8  2012/08/31 15:44:56  13.327  50.40410.0 GULF OF ADEN
 4.9  2012/08/31 15:24:07  10.364  126.88542.9 PHILIPPINE ISLANDS REGION
 5.0  2012/08/31 14:59:58  10.379  126.84935.0 PHILIPPINE ISLANDS REGION
2.52012/08/31 14:32:18  32.978 -115.4337.0 SOUTHERN CALIFORNIA
2.62012/08/31 14:20:37  60.030 -152.640117.4 SOUTHERN ALASKA
2.52012/08/31 14:17:26  37.797 -120.00131.5 CENTRAL CALIFORNIA
 4.9  2012/08/31 14:16:02  10.440  126.60231.7 PHILIPPINE ISLANDS REGION
2.92012/08/31 14:04:28  32.985 -115.4684.3 SOUTHERN CALIFORNIA
3.52012/08/31 13:56:02  32.983 -115.4506.9 SOUTHERN CALIFORNIA
 5.4  2012/08/31 13:40:30  10.454  126.72520.6 PHILIPPINE ISLANDS REGION
 4.8  2012/08/31 13:36:34  10.368  126.85548.0 PHILIPPINE ISLANDS REGION
 5.1  2012/08/31 13:31:39  10.413  126.83846.9 PHILIPPINE ISLANDS REGION
2.72012/08/31 13:30:34  33.020 -115.5367.3 SOUTHERN CALIFORNIA
2.92012/08/31 13:29:52  33.031 -115.53514.0 SOUTHERN CALIFORNIA
 5.4  2012/08/31 13:27:33  10.522  126.79735.0 PHILIPPINE ISLANDS REGION
2.92012/08/31 13:24:06  33.158 -116.0266.4 SOUTHERN CALIFORNIA
 5.5  2012/08/31 13:14:58  10.549  126.84424.3 PHILIPPINE ISLANDS REGION
 7.6  2012/08/31 12:47:35  10.838  126.70434.9 PHILIPPINE ISLANDS REGION

Tags: philippines

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