How many active trenches are there in the Philippines?

What are the active trenches in Mindanao?

The active faults that affect Cotabato are M’lang fault, Makilala-Malungon fault, North Columbio fault, South Columbio fault, and the western extension of the Mindanao fault (Cotabato-Sindangan fault). “Cotabato Trench is also a major source of earthquakes which can affect the region.

What are the most active faults in the Philippines?

There are five active fault lines in the country namely the Western Philippine Fault, the Eastern Philippine Fault, the South of Mindanao Fault, Central Philippine Fault and the Marikina/Valley Fault System.

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