Reviewed by USGS4y ago
M2.9 earthquake in Alaska Peninsula
Thursday, July 14, 2022, 16:53:31 UTC · 58.236°N, 156.027°W
A magnitude 2.9 earthquake struck in Alaska Peninsula on Thursday, July 14, 2022, 16:53:31 UTC, at a depth of 144.4 km (intermediate).
- Magnitude
- 2.9
- Minor · ml
- Depth
- 144 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 earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
338 kg of TNT
That is about 1/44,601 of the Hiroshima bomb. A magnitude 5.0 releases about 1,413 times more energy.
Tectonic setting
328 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
144 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 lists 3 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M3.1 on August 11, 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 358 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.147 km ESE of Pedro Bay, AlaskaJanuary 24, 2016 · 218 km NE of this epicenter
- 7.14 km ENE of Karluk, AlaskaNovember 7, 1912 · 120 km SE of this epicenter
- 7.0113 km ESE of Chignik, AlaskaMay 4, 1923 · 270 km S of this epicenter
- 7.026 km SSE of Karluk, AlaskaDecember 6, 1999 · 141 km SE of this epicenter
- 6.9112 km E of Chignik, AlaskaOctober 11, 2021 · 218 km S of this epicenter
- 6.9143 km ESE of Chignik, AlaskaFebruary 13, 1951 · 271 km S of this epicenter
- 6.9171 km SW of Akhiok, AlaskaFebruary 6, 1964 · 280 km S 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. The most severe:
- 1900M8.3
Kodiak Island
9 Oct 1900 · 198 km away · intensity VIII
Limited damage (under $1M)
- 1788M8.0
Unga Island
21 Jul 1788 · 227 km away · intensity VII
Limited damage (under $1M)tsunami
- 2016M7.1
Kenai
24 Jan 2016 · 218 km away · intensity VII
Limited damage (under $1M)
- 1970M6.0
Andreanof Islands
11 Mar 1970 · 150 km away · intensity V
Limited damage (under $1M)tsunami
- 1792
Kodiak Island
1792 · 276 km away · intensity VII
Limited damage (under $1M)tsunami
- 1906M7.6
Aleutian Islands
23 Dec 1906 · 200 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.