earthquake Flinn-Engdahl region NEAR EAST COAST OF HONSHU, JAPAN smi:service.iris.edu/fdsnws/event/1/query?magnitudeid=16642444 smi:service.iris.edu/fdsnws/event/1/query?originid=9933375 2011-03-11T05:46:23.2000 ISC 38.2963 142.498 19700.0 smi:service.iris.edu/fdsnws/event/1/query?originid=9933383 MW 9.1 GCMT