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M6.8 earthquake, Japan, 1923-08-12

MagnitudeM6.8mw

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Depth15 km

Time (UTC)1923-08-12 10:06

Rank in 192325 / 93among M6+

Rank since 19002198 / 14,458

Energy vs an M6×16approx.

148 km SE of Katsuren-haebaru, Japan · 25.49, 129.03

M6.5+ within 300 km (largest first)

1938 M7.6M7.6

1917 M7.3M7.3

1901 M7.2M7.2

1995 M7.1M7.1

2010 M7.0M7.0

1911 M7.0M7.0

1923 M7.0M7.0

1923 M6.8M6.8

1926 M6.8M6.8

1968 M6.7M6.7

1963 M6.7M6.7

1959 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M7.0 1923-04-23	1923-04-23 03:17	20 km	70 km WNW of Naha, Japan
M6.2 1919-07-17	1919-07-17 09:48	15 km	122 km WNW of Naha, Japan
M6.2 1918-02-13	1918-02-13 20:25	15 km	184 km SE of Itoman, Japan
M7.3 1917-07-04	1917-07-04 00:38	35 km	120 km ENE of Hirara, Japan
M7.0 1911-02-23	1911-02-23 11:14	35 km	12 km SE of Ginowan, Japan
M6.2 1909-08-29	1909-08-29 10:29	35 km	19 km SE of Ginowan, Japan
M7.2 1901-06-24	1901-06-24 07:02	35 km	Ryukyu Islands, 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.