Reviewed by USGSAlaska11d ago
M2.5 earthquake 59 km S of King Cove, Alaska
Wednesday, September 16, 2026, 01:58:57 UTC · 54.531°N, 162.430°W
A magnitude 2.5 earthquake struck 59 km S of King Cove, Alaska on Wednesday, September 16, 2026, 01:58:57 UTC, at a depth of 52.9 km (shallow).
- Magnitude
- 2.5
- Minor · ml
- Depth
- 53 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 earthquake
In context
How big was it, and why here?
Energy released
85 kg of TNT
That is about 1/177,558 of the Hiroshima bomb. A magnitude 5.0 releases about 5,623 times more energy.
Tectonic setting
123 km
from the nearest mapped plate boundary, between the North American and Pacific plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
53 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 has not published any M2.5+ earthquake within 50 km since this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 418 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 · 118 km S of this epicenter
- 8.21938 Semidi Islands, Alaska EarthquakeNovember 10, 1938 · 281 km E of this epicenter
- 7.82020 Perryville, Alaska EarthquakeJuly 22, 2020 · 253 km E of this epicenter
- 7.62020 Sand Point, Alaska EarthquakeOctober 19, 2020 · 181 km E of this epicenter
- 7.454 km SE of Sand Point, AlaskaMay 31, 1917 · 171 km E of this epicenter
- 7.32025 Sand Point, Alaska EarthquakeJuly 16, 2025 · 127 km E of this epicenter
- 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 109 km E of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 82 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 12 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 · 118 km away · intensity VI
168 deaths$26 million damagetsunami
- 2023M7.2
Alaska Peninsula
16 Jul 2023 · 108 km away · intensity VI
1 deathtsunami
- 2020M7.8
Alaska
22 Jul 2020 · 253 km away · intensity VII
Limited damage (under $1M)tsunami
- 1938M8.2
Alaska
10 Nov 1938 · 280 km away · intensity VI
tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 106 km away
tsunami
- 2020M7.6
Alaska
19 Oct 2020 · 181 km away · intensity IX
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.