Reviewed by USGSAlaska2y ago
M2.7 earthquake 34 km NNW of Cold Bay, Alaska
Monday, April 15, 2024, 05:22:23 UTC · 55.453°N, 162.987°W
A magnitude 2.7 earthquake struck 34 km NNW of Cold Bay, Alaska on Monday, April 15, 2024, 05:22:23 UTC, at a depth of 164.3 km (intermediate).
- Magnitude
- 2.7
- Minor · ml
- Depth
- 164 km
- Intermediate
- 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
169 kg of TNT
That is about 1/88,990 of the Hiroshima bomb. A magnitude 5.0 releases about 2,818 times more energy.
Tectonic setting
231 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: intermediate
164 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 371 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 · 218 km S of this epicenter
- 7.82020 Perryville, Alaska EarthquakeJuly 22, 2020 · 281 km E of this epicenter
- 7.62020 Sand Point, Alaska EarthquakeOctober 19, 2020 · 234 km E of this epicenter
- 7.454 km SE of Sand Point, AlaskaMay 31, 1917 · 203 km E of this epicenter
- 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 185 km SE of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 151 km SE of this epicenter
- 7.139 km S of Akutan, AlaskaMarch 22, 1957 · 258 km SW of this epicenter
- 7.071 km SE of King Cove, AlaskaMay 30, 1991 · 132 km SE 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 · 218 km away · intensity VI
168 deaths$26 million damagetsunami
- 2023M7.2
Alaska Peninsula
16 Jul 2023 · 180 km away · intensity VI
1 deathtsunami
- 2020M7.8
Alaska
22 Jul 2020 · 281 km away · intensity VII
Limited damage (under $1M)tsunami
- 1938M8.2
Alaska
10 Nov 1938 · 291 km away · intensity VI
tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 136 km away
tsunami
- 2020M7.6
Alaska
19 Oct 2020 · 234 km away · intensity IX
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.