The Japan Meteorological Agency said at about 4:53 p.m. on the 20th that an earthquake estimated at magnitude 7.4 struck off the east coast of Honshu.
The quake struck off Iwate Prefecture, Honshu, at a depth of 10 kilometers. In Hashikamizo, Aomori Prefecture, Honshu, shaking of intensity upper 5 was observed. Intensity upper 5 is shaking strong enough that most people find it difficult to move and unsecured furniture can topple.
Shaking was also detected in parts of Tokyo and in Miyako and Morioka in Iwate Prefecture, and Hachinohe and Shichinohe in Aomori Prefecture.
A tsunami of up to 3 meters is expected along the southern coasts of Iwate Prefecture and Hokkaido due to the earthquake, and warnings have been issued.
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