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M6.8 earthquake, Japan, 1987-02-06

MagnitudeM6.8mw

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Depth48 km

Time (UTC)1987-02-06 13:16

Rank in 198720 / 166among M6+

Rank since 19002337 / 14,458

Energy vs an M6×16approx.

72 km E of Iwaki, Japan · 36.99, 141.69

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
M6.4 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
M6.1 1981-09-25	1981-09-25 15:01	25 km	140 km ESE of ?funato, Japan
M6.4 1981-01-22	1981-01-22 19:34	20 km	122 km E of Ishinomaki, Japan
M6.1 1981-01-19	1981-01-19 01:14	33 km	113 km ESE of ?funato, 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.