A quake big enough to shake houses, about 100 miles from the broken Fukushima Daiichi nuclear reactors. Details from Japan Meteorological Agency:
Earthquake Information (Information on seismic intensity at each site)
Issued at 21:10 JST 17 Apr 2013
Occurred at (JST) Latitude
(degree)Longitude
(degree)Depth Magnitude Region Name 21:03 JST 17 Apr 2013 38.5N 141.6E 60 km 5.8 Miyagi-ken Oki
-jsq
PS: Owed to Masaichi Shiozaki.