What is the possible cause of the destructive earthquake that strikes Mindanao? Claim
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A magnitude 6.6 earthquake struck the southern Philippines on Tuesday, leaving at least seven killed and widespread damage.

The epicenter of the earthquake was 14 kilometers to the east of Bual, Philippines, and 60 miles from Davao City, the capital of Mindanao. At this time, the USGS has issued no warning of a tsunami threat for the nearby islands.

At this time, over 1,200 homes and ten schools have been destroyed by the recent earthquake with many more sustaining significant damage from the shaking.

This was the second powerful earthquake to strike Mindanao in just a couple of weeks. The region experienced a 6.3 magnitude earthquake on October 16, 2019, killing five.

The video below shows the shaking across Mindanao as people flee to cover and scarily watch their entire office building shake. The ongoing movements along a nearby major fault line are the result of the two earthquakes.

The Philippines are located to the southwest of the Philippine Sea, which is bordered by multiple major tectonic plate convergences. The Philippine Sea plate is subducting underneath the Philippines, causing the formation of the Philippine Trench and ongoing volcanics and earthquakes in the island nation.

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What’s Really Inside A Proton?

As the Philippine Sea plate moves underneath the Sundae plate, it creates the volcanic island arc chain of the Philippines. During this process, we often see major faulting and earthquakes associated with movement along those faults.

The Philippine fault extends 1,200 km and has been known to produce large earthquakes. In 1990, an M 7.6 earthquake struck Luzon from movement along the same Philippine fault line. Situated along the ring of fire, the Philippine region experiences high earthquake activity due to the subduction of the Pacific plate underneath bordering continental plates. This causes significant and continual earthquake activity as movement continues along faults.

Approximately six years ago in October of 2013, the nearby island of Bohol was struck by a 7.3 magnitude earthquake, killing 100 people.

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This all I know. Hope it helps~ Good luck!!~