Earthquake LogM7.0 earthquake, Alaska, 1940-04-16
MagnitudeM7.0mw
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Depth30 km
Time (UTC)1940-04-16 06:07
Rank in 19408 / 105among M6+
Rank since 19001335 / 14,458
Energy vs an M6×36approx.
80 km SSE of Attu Station, Alaska · 52.22, 173.78
M6.5+ within 300 km (largest first)
M7.9
M7.6
M7.4
M7.2
M7.1
M7.0
M7.0
M7.0
M7.0
M7.0
M6.9
M6.8
Earlier M6+ within 300 km
| Event | Time (UTC) | Depth | Place |
|---|---|---|---|
| M6.6 1940-02-07 | 1940-02-07 17:15 | 15 km | 201 km SE of Attu Station, Alaska |
| M7.2 1939-09-08 | 1939-09-08 12:04 | 15 km | 238 km SSE of Attu Station, Alaska |
| M6.1 1939-08-21 | 1939-08-21 15:19 | 35 km | 286 km ESE of Attu Station, Alaska |
| M6.2 1936-11-15 | 1936-11-15 22:20 | 15 km | 192 km WNW of Attu Station, Alaska |
| M6.8 1935-02-22 | 1935-02-22 17:06 | 30 km | 95 km SE of Attu Station, Alaska |
| M6.0 1931-05-30 | 1931-05-30 11:34 | – | 72 km S of Attu Station, Alaska |
| M7.9 1929-12-17 | 1929-12-17 10:58 | 20 km | 93 km NW of Attu Station, Alaska |
| M6.3 1925-01-30 | 1925-01-30 17:28 | 28 km | 76 km WNW of Attu Station, Alaska |
| M6.4 1923-07-31 | 1923-07-31 15:07 | 15 km | 124 km SSW of Attu Station, Alaska |
| M6.5 1923-07-22 | 1923-07-22 14:18 | 25 km | 66 km S of Attu Station, Alaska |
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.