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M6.7 earthquake, Japan, 1983-06-21

MagnitudeM6.7mw

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Depth10 km

Time (UTC)1983-06-21 06:25

Rank in 198332 / 136among M6+

Rank since 19002864 / 14,458

Energy vs an M6×11approx.

122 km WNW of Shimokizukuri, Japan · 41.35, 139.10

M6.5+ within 300 km (largest first)

1931 M7.9M7.9

1993 M7.7M7.7

2025 M7.6M7.6

1901 M7.5M7.5

1983 M7.4M7.4

1939 M7.2M7.2

1945 M7.2M7.2

1914 M7.0M7.0

1964 M7.0M7.0

1995 M7.0M7.0

2008 M6.9M6.9

2026 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.3 1983-06-09	1983-06-09 13:04	28 km	85 km W of Noshiro, Japan
M6.0 1983-06-09	1983-06-09 12:49	31 km	85 km W of Noshiro, Japan
M7.4 1983-05-26	1983-05-26 02:59	24 km	83 km WNW of Noshiro, Japan
M6.7 1982-03-21	1982-03-21 02:32	44 km	19 km S of Shizunai-furukawach?, Japan
M6.0 1981-10-15	1981-10-15 01:47	47 km	71 km NNE of Miyako, Japan
M6.0 1981-05-08	1981-05-08 23:34	200 km	118 km WSW of Iwanai, Japan
M6.3 1981-01-23	1981-01-23 04:58	116 km	29 km NW of Shizunai-furukawach?, Japan
M6.0 1974-11-08	1974-11-08 21:23	132 km	21 km SE of Tomakomai, Japan
M6.2 1972-03-19	1972-03-19 15:57	71 km	53 km ENE of Misawa, Japan
M6.0 1971-06-10	1971-06-10 19:59	231 km	129 km WNW of Fukaura, 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.