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2010 Mindanao earthquakes
The 2010 Mindanao earthquakes occurred in the Southern Philippines in the Moro Gulf. The sequence of events took place over several days in late July, and consisted of three primary shocks that were all over M7, but there were no reports of damage or casualties as they occurred far too deep (over ) to pose any serious threat.〔(2010 August–September). ("PHIVOLCS Observer" ), pg. 4. Philippine Institute of Volcanology and Seismology. Retrieved on 2012-04-23.〕
==Tectonic summary==
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. The initial M7.3 event is the foreshock of the M7.6 while the M7.4 is an aftershock of the M7.6.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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