Reviewed by USGSAlaska4y ago
M2.7 earthquake 86 km WNW of Karluk, Alaska
Tuesday, May 10, 2022, 21:15:43 UTC · 57.892°N, 155.775°W
A magnitude 2.7 earthquake struck 86 km WNW of Karluk, Alaska on Tuesday, May 10, 2022, 21:15:43 UTC, at a depth of 8.0 km (shallow).
- Magnitude
- 2.7
- Minor · ml
- Depth
- 8 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
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
291 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
8 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 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M2.6 on June 2, 2022. 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 397 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9Kodiak Island region, AlaskaOctober 9, 1900 · 289 km E of this epicenter
- 7.147 km ESE of Pedro Bay, AlaskaJanuary 24, 2016 · 238 km NE of this epicenter
- 7.14 km ENE of Karluk, AlaskaNovember 7, 1912 · 89 km E of this epicenter
- 7.0113 km ESE of Chignik, AlaskaMay 4, 1923 · 236 km S of this epicenter
- 7.026 km SSE of Karluk, AlaskaDecember 6, 1999 · 105 km SE of this epicenter
- 7.0164 km SE of Chignik, AlaskaSeptember 4, 1989 · 289 km S of this epicenter
- 6.9112 km E of Chignik, AlaskaOctober 11, 2021 · 184 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1900M8.3
Kodiak Island
9 Oct 1900 · 164 km away · intensity VIII
Limited damage (under $1M)
- 1788M8.0
Unga Island
21 Jul 1788 · 193 km away · intensity VII
Limited damage (under $1M)tsunami
- 2016M7.1
Kenai
24 Jan 2016 · 238 km away · intensity VII
Limited damage (under $1M)
- 1970M6.0
Andreanof Islands
11 Mar 1970 · 120 km away · intensity V
Limited damage (under $1M)tsunami
- 1792
Kodiak Island
1792 · 247 km away · intensity VII
Limited damage (under $1M)tsunami
- 1906M7.6
Aleutian Islands
23 Dec 1906 · 161 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.