Reviewed by USGSAlaska4y ago
M2.7 earthquake 25 km SW of Karluk, Alaska
Friday, May 6, 2022, 10:29:01 UTC · 57.419°N, 154.767°W
A magnitude 2.7 earthquake struck 25 km SW of Karluk, Alaska on Friday, May 6, 2022, 10:29:01 UTC, at a depth of 31.5 km (shallow).
- Magnitude
- 2.7
- Minor · ml
- Depth
- 32 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
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
213 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
32 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 in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 409 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.22021 Chignik, Alaska EarthquakeJuly 29, 2021 · 298 km SW of this epicenter
- 7.9Kodiak Island region, AlaskaOctober 9, 1900 · 226 km E of this epicenter
- 7.147 km ESE of Pedro Bay, AlaskaJanuary 24, 2016 · 258 km N of this epicenter
- 7.14 km ENE of Karluk, AlaskaNovember 7, 1912 · 30 km NE of this epicenter
- 7.0113 km ESE of Chignik, AlaskaMay 4, 1923 · 214 km SW of this epicenter
- 7.026 km SSE of Karluk, AlaskaDecember 6, 1999 · 27 km E of this epicenter
- 7.0164 km SE of Chignik, AlaskaSeptember 4, 1989 · 255 km SW 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. The most severe:
- 1900M8.3
Kodiak Island
9 Oct 1900 · 86 km away · intensity VIII
Limited damage (under $1M)
- 1788M8.0
Unga Island
21 Jul 1788 · 116 km away · intensity VII
Limited damage (under $1M)tsunami
- 2016M7.1
Kenai
24 Jan 2016 · 258 km away · intensity VII
Limited damage (under $1M)
- 1970M6.0
Andreanof Islands
11 Mar 1970 · 53 km away · intensity V
Limited damage (under $1M)tsunami
- 1792
Kodiak Island
1792 · 173 km away · intensity VII
Limited damage (under $1M)tsunami
- 2021M8.2
Alaska Peninsula
29 Jul 2021 · 300 km away · intensity VIII
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.