Japan upgrades magnitude of quake to 9.0
aftershock
Japan upgrades magnitude of quake to 9.0
Outline of the 2011 off the Pacific coast of Tohoku Earthquake (Mw 9.0) : Seismicity: foreshocks, mainshock, aftershocks, and induced activity
三陸新報｜２０１１年４月９日発行 (pdfファイル)
Student News Action Network - 2011 Tohoku Earthquake
Student News Action Network - Massive Earthquake Struck Japan
余震不安、ストレス[余震带来的不安、压力・・・如何保护上班族的健康？](中文)
「地震酔い」が抜けない[直无法摆脱像晕船一样的症状。这是怎么回事？]（中文）
7.3-magnitude quake rocks Japan; no damage reports