QuakeScout
Magnitude2.5

Reviewed by USGSAlaska16d ago

M2.5 earthquake 119 km SSE of Akutan, Alaska

Friday, September 11, 2026, 04:13:09 UTC · 53.154°N, 165.020°W

A magnitude 2.5 earthquake struck 119 km SSE of Akutan, Alaska on Friday, September 11, 2026, 04:13:09 UTC, at a depth of 25.2 km (shallow).

Magnitude
2.5
Minor · ml
Depth
25 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

25 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 4 M2.5+ earthquakes within 50 km since this event; the largest was M3.2 on September 14, 2026. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

M31h6h1d3d7d14dMainshock M2.5
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 2.598 km SE of Akutan, Alaska10d ago · 39 km NE of this epicenter
  2. 2.698 km SE of Akutan, Alaska11d ago · 31 km N of this epicenter
  3. 2.798 km SE of Akutan, Alaska12d ago · 45 km NE of this epicenter
  4. 3.2122 km SE of Akutan, Alaska13d ago · 27 km NE of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 576 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 8.6The 1946 Unimak Island, Alaska EarthquakeApril 1, 1946 · 150 km E of this epicenter
  2. 7.881 km E of Nikolski, AlaskaJuly 2, 1965 · 177 km W of this epicenter
  3. 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 299 km NE of this epicenter
  4. 7.139 km S of Akutan, AlaskaMarch 22, 1957 · 85 km NW of this epicenter
  5. 7.135 km SW of Nikolski, AlaskaMarch 11, 1957 · 284 km W of this epicenter
  6. 7.071 km SE of King Cove, AlaskaMay 30, 1991 · 273 km NE of this epicenter
  7. 7.0203 km SSE of Unalaska, AlaskaAugust 22, 1940 · 115 km S 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 168 recorded deaths. The most severe:

  1. 1946M8.6

    Unimak Island

    1 Apr 1946 · 150 km away · intensity VI

    168 deaths$26 million damagetsunami

  2. 1965M6.5

    Aleutian Islands: Fox Islands

    2 Jul 1965 · 169 km away

    Limited damage (under $1M)tsunami

  3. 1902M7.8

    Aleutian Islands: Fox Islands

    1 Jan 1902 · 187 km away

  4. 1957M7.5

    Aleutian Islands: Fox Islands

    22 Mar 1957 · 206 km away · intensity V

  5. 1962M6.5

    Aleutian Islands: Fox Islands

    21 Dec 1962 · 248 km away

    tsunami

  6. 1820

    East Aleutian Islands

    1 Mar 1820 · 154 km away

    tsunami

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

Nearby trackers

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