At 14:46 (JST) on Friday 11 March 2011 (according to Japan Meteorological Agency's report), a big earthquake of magnitude 9.0 occured.
Maximum of seismic intensity was observed in Kurihara, Miyagi and it was level 7.

In Kashiwa, Chiba, where our school is, a tremor with an intensity of 6-lower on the Japanese seven-stage seismic scale was observed and aftershocks are going on occuring even it passed a day.

Therefore, members of "Your guide of earthquake safety" is reporting states of around of us.