Reviewed by USGSAlaska2y ago
M3.0 earthquake 91 km SSE of Sand Point, Alaska
Monday, January 29, 2024, 00:04:25 UTC · 54.597°N, 159.890°W
A magnitude 3.0 earthquake struck 91 km SSE of Sand Point, Alaska on Monday, January 29, 2024, 00:04:25 UTC, at a depth of 35.0 km (shallow).
- Magnitude
- 3.0
- Minor · ml
- Depth
- 35 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
477 kg of TNT
That is about 1/31,575 of the Hiroshima bomb. A magnitude 5.0 releases about 1,000 times more energy.
Tectonic setting
88 km
from the nearest mapped plate boundary, between the North American and Pacific plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
35 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 50 km
USGS lists 13 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M3.2 on February 9, 2024. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 2.579 km SSE of Sand Point, Alaska2y ago · 14 km N of this epicenter
- 2.6105 km SSE of Sand Point, Alaska2y ago · 16 km SE of this epicenter
- 2.7103 km SSE of Sand Point, Alaska2y ago · 13 km SE of this epicenter
- 3.0132 km SSE of Sand Point, Alaska2y ago · 42 km S of this epicenter
- 2.786 km SSE of Sand Point, Alaska2y ago · 6 km N of this epicenter
- 2.566 km S of Sand Point, Alaska2y ago · 50 km W of this epicenter
- 3.0116 km SSE of Sand Point, Alaska2y ago · 26 km SE of this epicenter
- 2.6106 km SSE of Sand Point, Alaska2y ago · 17 km S of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 391 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.6The 1946 Unimak Island, Alaska EarthquakeApril 1, 1946 · 228 km SW of this epicenter
- 8.21938 Semidi Islands, Alaska EarthquakeNovember 10, 1938 · 127 km NE of this epicenter
- 8.22021 Chignik, Alaska EarthquakeJuly 29, 2021 · 154 km NE of this epicenter
- 7.82020 Perryville, Alaska EarthquakeJuly 22, 2020 · 98 km NE of this epicenter
- 7.62020 Sand Point, Alaska EarthquakeOctober 19, 2020 · 17 km E of this epicenter
- 7.454 km SE of Sand Point, AlaskaMay 31, 1917 · 44 km N of this epicenter
- 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 61 km W of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 82 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 10 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 169 recorded deaths. The most severe:
- 1946M8.6
Unimak Island
1 Apr 1946 · 228 km away · intensity VI
168 deaths$26 million damagetsunami
- 2023M7.2
Alaska Peninsula
16 Jul 2023 · 58 km away · intensity VI
1 deathtsunami
- 2020M7.8
Alaska
22 Jul 2020 · 98 km away · intensity VII
Limited damage (under $1M)tsunami
- 1938M8.2
Alaska
10 Nov 1938 · 138 km away · intensity VI
tsunami
- 2021M8.2
Alaska Peninsula
29 Jul 2021 · 154 km away · intensity VIII
tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 84 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.