M7.6 earthquake on Friday, 31 August 2012 at 12:47 (93 km E of Sulangan, Philippines)

Earthquake kills one person, injured another, damages many houses
Due to its distance from the coast, the quake, which had a great destructive potential, caused much less damage than had it occurred nearer to or beneath land, fortunately:
In total, only one person was confirmed killed and two injured as a house in the southern city of Cagayan de Oro, Mindanao, got caught by a landslide along with several other homes.
77 homes were reported to have suffered damage in General MacArthur, Eastern Samar, and 6 houses in Barangay Casoroy, San Julian. A wall from an old building collapsed in Butuan City.
Although the tsunami warning had been called off, close investigations revealed that a very small tsunami had indeed occurred. A small 3 cm (1.2 in) wave was recorded at Legazpi in Albay province and shortly after also further south near Davao City. Slight sea level anomalies were observed in several other locations.

Tectonic characteristics of this quake:
The quake was rather unusual in its mechanism as it was the result of reverse faulting, caused by extensional stress, in the interior of the Philippine Sea plate and not as most quakes in the region, as result of compression between the Philippine Sea plate colliding with and subducting under the Sunda plate (on which the Philippines sit). The hypocenter of the quake was 50 kilometers to the east of the plate boundary within the shallow oceanic lithosphere of the Philippine Sea Plate.
No major tsunami - warning cancelled
Update Fri 31 Aug 15:18
No destructive tsunami was generated fortunately, and the tsunami warning was cancelled for most of the Pacific. The most recent calculations show it was a magnitude 7.6 quake.
Update Fri 31 Aug 13:12
A massive earthquake (preliminary calculations 7.9 magnitude) occurred in the Philippines 120 km east of Samar Island at 12:47 GMT today (31 Aug). The nearest city to the epicenter is Sulangan at 93 km (58mi) to the west.
The quake occurred at 35 km under the Pacific and has the potential to generate a tsunami.
A tsunami warning was issued for the Pacific, but it is still not clear whether a tsunami was actually generated or not.
Please check the Tsunami warning center for the latest information.

Major magnitude 7.6 earthquake - Philippines Sea, 239 km northeast of Butuan, Philippines, on Fri, 31 Aug 2012 20:47

Major magnitude 7.6 earthquake - Philippines Sea, 239 km northeast of Butuan, Philippines, on Fri, 31 Aug 2012 20:47

Major magnitude 7.6 earthquake at 28 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Aug 31, 2012 12:47:33 UTC
Local time at epicenter: Fri, 31 Aug 2012 20:47
Magnitude: 7.6
Depth: 28.0 km
Epicenter latitude / longitude: 10.811°N / 126.638°E (Philippine Sea, Philippines)
Antipode: 10.811°S / 53.362°W
Nearest volcano: Cabalian (173 km / 107 mi)
Nearby towns and cities:
90 km (56 mi) E of Sulangan (pop: 3,030) --> See nearby quakes!
169 km (105 mi) NE of Surigao City (pop: 87,800) --> See nearby quakes!
185 km (115 mi) ESE of Tacloban City (pop: 242,100) --> See nearby quakes!
185 km (115 mi) ESE of Panalanoy (pop: 189,100) --> See nearby quakes!
219 km (136 mi) ESE of Catbalogan (pop: 68,100) --> See nearby quakes!
223 km (138 mi) E of Ormoc City (pop: 191,200) --> See nearby quakes!
239 km (149 mi) NNE of Butuan (pop: 309,700) --> See nearby quakes!
242 km (150 mi) NNE of Libertad (pop: 250,400) --> See nearby quakes!
305 km (190 mi) E of Cebu City (pop: 798,600) --> See nearby quakes!
745 km (463 mi) ESE of Manila (pop: 1,600,000) --> See nearby quakes!
197 km (122 mi) E of Leyte Island (pop: 2,388,500) --> See nearby quakes!
361 km (224 mi) NNE of Mindanao Island (pop: 25,537,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.6 x 1016 joules (4402 gigawatt hours, equivalent to 3.8 x 106 tons of TNT or 236.7 atomic bombs!) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
7.628 kmOff Samar Island, PhilippinesUSGS
7.620 km PHILIPPINE ISLANDS REGIONEMSC
7.545 kmPhilippine Islands RegionGFZ
7.50 kmnullGeoAu
7.863 kmPhilippine Islands RegionBMKG
7.645 km112km S 78° E of Guiuan (Eastern Samar)PHILVOLCS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.
shake map
(shakemap: USGS)

User reports for this quake (8)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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/ Moderate shaking (MMI V) : It was so scary. I was on vacation and it just happened. It was sad that 1 person died (mom) and her child was hospitalized. I luckily hid and was safe. It was crazy. The amount of damage.   
Kalimati (4700.2 km WNW of epicenter) [Map] / Light shaking (MMI IV)
Butuan City / Moderate shaking (MMI V)
Manila (Philippines, 744 km NW of epicenter) : Not violent - long period of swaying to and fro - thought absent mindedly that I was at sea before i realised I was on the top floor of my hotel! (reported through EMSC)  
Loon (Philippines, 337 km W of epicenter) : Felt a swaying and heard a faint rumble. Came here first to check where the epicenter was to consider the chance of a tsunami, all safe here. (reported through EMSC)  
Mandaue City (Philippines, 306 km W of epicenter) : Bed was shaking right and left (reported through EMSC)  
Lapu-Lapu City (Philippines, 301 km W of epicenter) : earthquake can make drunk,so dangerous to all,, (reported through EMSC)  
Patin-ay (Philippines, 268 km S of epicenter) : just take care of our selves (reported through EMSC)  
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Aftershocks

More info

Recorded aftershocks, latest first (1771 quakes)

  • 27 Aug 2014 01:10 UTC
    | M 4.7 |
    64 km (39.8 mi) depth
    |
    186 km (116 mi) distance
    | EMSC | Details
  • 09 Aug 2014 10:54 UTC
    | M 4.6 |
    35 km (21.7 mi) depth
    |
    283 km (176 mi) distance
    | USGS | Details
  • 03 Aug 2014 22:36 UTC
    | M 4.4 |
    60 km (37.3 mi) depth
    |
    82 km (51 mi) distance
    | EMSC | Details
  • 24 Jul 2014 23:57 UTC
    | M 5.1 |
    47 km (29.2 mi) depth
    |
    149 km (92 mi) distance
    | GFZ | Details
  • 20 Jul 2014 10:54 UTC
    | M 3.7 |
    115 km (71.5 mi) depth
    |
    358 km (222 mi) distance
    | PHILVOLCS | Details
  • 19 Jul 2014 22:21 UTC
    | M 4.9 |
    10 km (6.2 mi) depth
    |
    290 km (180 mi) distance
    | GFZ | Details
  • 18 Jul 2014 19:15 UTC
    | M 4.2 |
    20 km (12.4 mi) depth
    |
    303 km (188 mi) distance
    | PHILVOLCS | Details
  • 18 Jul 2014 19:10 UTC
    | M 3.3 |
    7 km (4.3 mi) depth
    |
    355 km (221 mi) distance
    | PHILVOLCS | Details
  • 18 Jul 2014 19:00 UTC
    | M 3.8 |
    19 km (11.8 mi) depth
    |
    303 km (188 mi) distance
    | PHILVOLCS | Details
  • 18 Jul 2014 18:58 UTC
    | M 3.5 |
    19 km (11.8 mi) depth
    |
    282 km (176 mi) distance
    | PHILVOLCS | Details
  • 16 Jul 2014 11:45 UTC
    | M 2.5 |
    18 km (11.2 mi) depth
    |
    301 km (187 mi) distance
    | PHILVOLCS | Details
  • 13 Jul 2014 02:56 UTC
    | M 3.4 |
    2 km (1.2 mi) depth
    |
    379 km (236 mi) distance
    | PHILVOLCS | Details
  • 11 Jul 2014 05:22 UTC
    | M 3.4 |
    5 km (3.1 mi) depth
    |
    308 km (192 mi) distance
    | PHILVOLCS | Details
  • 11 Jul 2014 05:22 UTC
    | M 4.2 |
    11 km (6.8 mi) depth
    |
    303 km (188 mi) distance
    | PHILVOLCS | Details
  • 10 Jul 2014 17:20 UTC
    | M 2.1 |
    15 km (9.3 mi) depth
    |
    315 km (196 mi) distance
    | PHILVOLCS | Details
  • 10 Jul 2014 12:47 UTC
    | M 3.2 |
    25 km (15.5 mi) depth
    |
    265 km (165 mi) distance
    | PHILVOLCS | Details
  • Show all

Earlier earthquakes in the same area

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