The part I find most disconcerting about this event, is that it occurred at the southern-most region of the Philippine Trench, which is, as far as I know, the deepest region in the crust on the planet.

I would expect some volcanic activity in the Philippines at the very least in the near future.

Here’s a link to the plate boundaries and volcano’s in the region:
http://volcano.und.edu/vwdocs/volc_images/southeast_asia/philippines/tectonics.html

Billion
http://www.billionwatts.com