Home › 1987 › Japan

M6.7 earthquake, Japan, 1987-04-22

MagnitudeM6.7mw

This page is updated only once a day and is not an alert service. For current earthquake and tsunami information, check the Japan Meteorological Agency, the USGS and your local authorities.

Depth30 km

Time (UTC)1987-04-22 20:13

Rank in 198733 / 166among M6+

Rank since 19002885 / 14,458

Energy vs an M6×11approx.

62 km E of Iwaki, Japan · 37.16, 141.57

M6.5+ within 300 km (largest first)

2011 M9.1M9.1

1923 M8.0M8.0

2011 M7.9M7.9

1923 M7.8M7.8

1938 M7.8M7.8

1938 M7.7M7.7

1978 M7.7M7.7

2011 M7.7M7.7

1905 M7.7M7.7

1964 M7.6M7.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.1 1987-04-16	1987-04-16 19:23	55 km	52 km E of Iwaki, Japan
M6.7 1987-04-07	1987-04-07 00:40	29 km	71 km E of Namie, Japan
M6.8 1987-02-06	1987-02-06 13:16	48 km	72 km E of Iwaki, Japan
M6.4 1987-02-06	1987-02-06 12:23	36 km	80 km E of Iwaki, Japan
M6.0 1986-11-30	1986-11-30 20:15	37 km	31 km SE of ?funato, Japan
M6.6 1986-06-24	1986-06-24 02:53	63 km	46 km SSE of Katsuura, Japan
M6.2 1986-02-12	1986-02-12 02:59	30 km	49 km ESE of Hitachi, Japan
M6.5 1985-08-12	1985-08-12 03:49	52 km	75 km ENE of Namie, Japan
M6.2 1982-07-23	1982-07-23 17:54	31 km	88 km ENE of Hasaki, Japan
M7.1 1982-07-23	1982-07-23 14:23	37 km	93 km ENE of Hasaki, Japan

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.