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M6.9 earthquake, Japan, 1981-01-18

MagnitudeM6.9ms

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Depth33 km

Time (UTC)1981-01-18 18:17

Rank in 198111 / 83among M6+

Rank since 19001862 / 14,458

Energy vs an M6×22approx.

101 km ESE of ?funato, Japan · 38.64, 142.75

M6.5+ within 300 km (largest first)

2011 M9.1M9.1

1933 M8.4M8.4

1968 M8.2M8.2

1960 M8.0M8.0

1931 M7.9M7.9

2011 M7.9M7.9

1938 M7.8M7.8

1994 M7.8M7.8

1938 M7.7M7.7

1978 M7.7M7.7

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.2 1981-01-18	1981-01-18 18:11	33 km	110 km ESE of ?funato, Japan
M6.4 1979-02-20	1979-02-20 06:32	10 km	164 km ENE of Miyako, Japan
M6.3 1978-06-14	1978-06-14 11:34	40 km	93 km E of Ishinomaki, Japan
M7.7 1978-06-12	1978-06-12 08:14	44 km	68 km ESE of Ishinomaki, Japan
M6.1 1978-02-20	1978-02-20 04:36	60 km	37 km SSE of ?funato, Japan
M6.0 1977-12-23	1977-12-23 21:14	41 km	104 km ESE of ?tsuchi, Japan
M6.0 1976-11-08	1976-11-08 08:19	38 km	89 km ESE of Ishinomaki, Japan
M6.1 1975-06-14	1975-06-14 23:36	19 km	241 km ENE of Hasaki, Japan
M6.0 1974-10-12	1974-10-12 06:14	24 km	168 km NE of Miyako, Japan
M6.2 1974-10-10	1974-10-10 06:56	45 km	144 km ENE of Hachinohe, 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.