Home › 1984 › Japan

M7.4 earthquake, Japan, 1984-03-06

MagnitudeM7.4mw

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.

Depth457 km

Time (UTC)1984-03-06 02:17

Rank in 19843 / 133among M6+

Rank since 1900583 / 14,458

Energy vs an M6×126approx.

Izu Islands, Japan region · 29.38, 138.94

M6.5+ within 300 km (largest first)

2015 M7.8M7.8

2000 M7.4M7.4

1984 M7.4M7.4

1956 M7.3M7.3

1970 M7.1M7.1

1951 M7.1M7.1

1982 M7.1M7.1

1998 M7.1M7.1

1928 M7.0M7.0

1984 M6.9M6.9

2010 M6.8M6.8

1982 M6.8M6.8

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.8 1982-09-06	1982-09-06 01:47	176 km	Izu Islands, Japan region
M7.1 1982-07-04	1982-07-04 01:20	536 km	west of the Bonin Islands, Japan
M6.2 1980-12-19	1980-12-19 23:32	82 km	Izu Islands, Japan region
M6.1 1979-12-11	1979-12-11 17:26	110 km	Bonin Islands, Japan region
M6.1 1974-11-29	1974-11-29 22:05	419 km	Izu Islands, Japan region
M6.0 1973-01-31	1973-01-31 20:55	498 km	Bonin Islands, Japan region
M6.7 1970-12-07	1970-12-07 21:35	185 km	Izu Islands, Japan region
M7.1 1970-05-27	1970-05-27 12:05	390 km	Bonin Islands, Japan region
M6.4 1965-11-12	1965-11-12 17:52	21 km	Izu Islands, Japan region
M6.2 1964-01-15	1964-01-15 21:36	50 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.