Reviewed by USGSAlaska2y ago
M2.5 earthquake 222 km SSE of King Cove, Alaska
Thursday, May 30, 2024, 13:19:38 UTC · 53.103°N, 161.611°W
A magnitude 2.5 earthquake struck 222 km SSE of King Cove, Alaska on Thursday, May 30, 2024, 13:19:38 UTC, at a depth of 10.0 km (shallow).
- Magnitude
- 2.5
- Minor · ml
- Depth
- 10 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
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
43 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
10 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 3 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M3.0 on June 1, 2024. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 369 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 · 92 km NW of this epicenter
- 7.82020 Perryville, Alaska EarthquakeJuly 22, 2020 · 294 km NE of this epicenter
- 7.62020 Sand Point, Alaska EarthquakeOctober 19, 2020 · 211 km NE of this epicenter
- 7.454 km SE of Sand Point, AlaskaMay 31, 1917 · 239 km NE of this epicenter
- 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 154 km N of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 168 km N of this epicenter
- 7.139 km S of Akutan, AlaskaMarch 22, 1957 · 286 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 8 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 · 92 km away · intensity VI
168 deaths$26 million damagetsunami
- 2023M7.2
Alaska Peninsula
16 Jul 2023 · 161 km away · intensity VI
1 deathtsunami
- 2020M7.8
Alaska
22 Jul 2020 · 294 km away · intensity VII
Limited damage (under $1M)tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 215 km away
tsunami
- 2020M7.6
Alaska
19 Oct 2020 · 211 km away · intensity IX
tsunami
- 1948M7.5
Alaska Peninsula
14 May 1948 · 160 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.