Some of you may have noticed that quake this morning - it was an M4.1, so no big deal by our standards. What worries me is location - the Uto peninsula, this time to the south, near Matsubase (previous recent quake clusters have been to the north).
Again, if that segment of the fault ruptures, it will have great effects on Kumamoto City. Perhaps the smaller quakes, though, are gradually relieving stress - or they may be foreshocks. - William