Earthquake LogM6.9 earthquake, Idaho, 1983-10-28
MagnitudeM6.9mw
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Depth10 km
Time (UTC)1983-10-28 14:06
Rank in 198319 / 136among M6+
Rank since 19001871 / 14,458
Energy vs an M6×22approx.
The 1983 Borah Peak Earthquake, Idaho · 44.06, -113.86
M6.5+ within 300 km (largest first)
M7.2
M6.9
M6.6
M6.6
M6.5
M6.5
Earlier M6+ within 300 km
| Event | Time (UTC) | Depth | Place |
|---|---|---|---|
| M6.1 1975-03-28 | 1975-03-28 02:31 | 5 km | 17 km NE of Snowville, Utah |
| M6.3 1959-08-18 | 1959-08-18 15:26 | 10 km | 22 km SW of Mammoth, Wyoming |
| M6.0 1959-08-18 | 1959-08-18 08:41 | 10 km | 16 km N of West Yellowstone, Montana |
| M6.5 1959-08-18 | 1959-08-18 07:56 | 10 km | 14 km N of Madison Junction, Wyoming |
| M7.2 1959-08-18 | 1959-08-18 06:37 | 12 km | The 1959 Hebgen Lake, Montana Earthquake |
| M6.1 1947-11-23 | 1947-11-23 09:46 | 15 km | 30 km SSW of Big Sky, Montana |
| M6.0 1945-02-14 | 1945-02-14 03:01 | 10 km | 44 km NNW of Stanley, Idaho |
| M6.1 1944-07-12 | 1944-07-12 19:30 | 10 km | 37 km N of Stanley, Idaho |
| M6.6 1934-03-12 | 1934-03-12 15:05 | 8 km | The 1934 Hansel Valley, Utah Earthquake |
| M6.4 1925-06-28 | 1925-06-28 02:05 | – | Clarkston Valley, Montana (Aftershock) |
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.