It's very deep - seems to have something to do with subduction, take a look at http://earthquake.usgs.gov/earthquakes/eventpage/usb000h4jh#summary http://earth

It's very deep - seems to have something to do with subduction, take a look at http://earthquake.usgs.gov/earthquakes/eventpage/usb000h4jh#summary http://earthquake.usgs.gov/earthquakes/eventpage/usb000h4jh#... and http://en.wikipedia.org/wiki/Wadati%E2%80%93Benioff_zone http://en.wikipedia.org/wiki/Wadati%E2%80%93Benioff_zone Looks like they can be felt very far but are less dangerous.