2010 Mindanao earthquakes

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2010 Mindanao earthquakes
2010 Mindanao earthquakes is located in Philippines
2010 Mindanao earthquakes
Date July 23–24, 2010
Origin time
  • 22:08:11 UTC (1st)
  • 22:51:11 UTC (2nd)
  • 23:15:08 UTC (3rd)
  • 7.3 Mw (1st)
  • 7.6 Mw (2nd)
  • 7.4 Mw (3rd)
  • 604.5 kilometres (375.6 mi)(1st)
  • 576.3 kilometres (358.1 mi) (2nd)
  • 616.7 kilometres (383.2 mi)(3rd)
Areas affected Philippines

The 2010 Mindanao earthquakes were a series of powerful earthquakes that occurred in the Southern Philippines in the Moro Gulf. There were no reports of damage or casualties as the shocks occurred far too deep (over 500 kilometres (310 mi)) to pose any serious threat.[1][2]

Tectonic summary[edit]

The southern part of the Philippines lies above the complex collisional zone between the Philippine Sea Plate and the Sunda Plate. The convergence between these two plates of between 6–11 cm per year is accommodated by a series of smaller plates. One of these, the Molucca Sea Plate, is currently being subducted beneath both the Philippine Sea Plate and the Sangihe Microplate, causing it to have an inverted U-shape seismic zone. The earthquakes were caused by the continuing distortion of the Molucca Sea Plate.[3][4] The initial M7.3 event is the foreshock of the M7.6 while the M7.4 is an aftershock of the M7.6.

Areas affected[edit]

These earthquakes occurred in Moro Gulf, off the island of Mindanao. The Mw 7.6 earthquake were felt in Philippines, Taiwan, and Malaysia.[5] The Mw 7.4 earthquake were felt in Philippines, Brunei, Malaysia, and Indonesia.[6]

Earthquakes magnitudes[edit]

The earthquakes with magnitudes above M6.4 are:

Date Local Time
(UTC +8)
Latitude Longitude Depth
July 23, 2010[7] 06:08 7.3 6.699°N 123.475°E 612.2 km
July 23, 2010[2] 06:51 7.6 6.470°N 123.532°E 583.8 km
July 23, 2010[4] 07:15 7.4 6.749°N 123.268°E 616.7 km
July 24, 2010[8] 05:35 6.5 6.226°N 123.522°E 555.3 km

On July 25, 2010 another earthquake hit Mindanao measuring 5.6 on the Richter scale. The epicenter, with the depth of 611 km, was initially determined to be 6.793 degrees north latitude and 123.603 degrees east longitude.[9]