Two Earthquakes, No Problems

[a_cubed]

A Magnitude 4.7 quake off the coast of Honshu at 10:40am. This is the first time I’ve been in an earthquake (that I could feel) in my office. That wasn’t much of a shake here in Tokyo, though. A larger one (larger at my location) hit at 12:20pm, now showing on the earthquake monitors as around magnitude 5.7(USGS)-5.9(EMSC/GFZ). Anyway, no problems for me, though as this is off the coast up towards Senda, I suspect people up there are feeling more nervous again. The Japanese Met Agency haven’t issued a tsunami warning, which is good.

Things had quietened down in November and December from the afterschocks of last year’s big one in March. I wonder when a region like Japan is regarded as stopping having aftershocks and is back into normal mode where a new earthquake is regarded as its own event.