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M6.9 earthquake, Japan, 1984-04-24

MagnitudeM6.9mw

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Depth403 km

Time (UTC)1984-04-24 04:11

Rank in 198415 / 133among M6+

Rank since 19001873 / 14,458

Energy vs an M6×22approx.

Izu Islands, Japan region · 30.91, 138.43

M6.5+ within 300 km (largest first)

1984 M7.4M7.4

2000 M7.4M7.4

2004 M7.4M7.4

1956 M7.3M7.3

1910 M7.2M7.2

2004 M7.2M7.2

1951 M7.1M7.1

1998 M7.1M7.1

2009 M7.1M7.1

1915 M7.0M7.0

1928 M7.0M7.0

1978 M6.9M6.9

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.4 1984-03-06	1984-03-06 02:17	457 km	Izu Islands, Japan region
M6.8 1982-09-06	1982-09-06 01:47	176 km	Izu Islands, Japan region
M6.2 1980-12-19	1980-12-19 23:32	82 km	Izu Islands, Japan region
M6.9 1978-03-07	1978-03-07 02:48	439 km	244 km SE of Shing?, Japan
M6.0 1978-03-07	1978-03-07 02:48	442 km	248 km SE of Shing?, Japan
M6.1 1974-11-29	1974-11-29 22:05	419 km	Izu Islands, Japan region
M6.0 1974-02-22	1974-02-22 00:36	385 km	107 km SE of Shing?, Japan
M6.7 1970-12-07	1970-12-07 21:35	185 km	Izu Islands, Japan region
M6.3 1968-02-28	1968-02-28 12:08	344 km	189 km S of ?yama, Japan
M6.4 1965-11-12	1965-11-12 17:52	21 km	Izu Islands, Japan region

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.