Reviewed by USGSAlaska29d ago
M2.5 earthquake 101 km SE of Akutan, Alaska
Saturday, August 29, 2026, 12:01:01 UTC · 53.513°N, 164.644°W
A magnitude 2.5 earthquake struck 101 km SE of Akutan, Alaska on Saturday, August 29, 2026, 12:01:01 UTC, at a depth of 22.7 km (shallow).
- Magnitude
- 2.5
- Minor · ml
- Depth
- 23 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
71 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
23 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 15 M2.5+ earthquakes within 50 km since this event; the largest was M3.9 on August 30, 2026. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 2.598 km SE of Akutan, Alaska10d ago · 10 km SW of this epicenter
- 2.698 km SE of Akutan, Alaska11d ago · 19 km SW of this epicenter
- 2.958 km SE of Akutan, Alaska11d ago · 44 km NW of this epicenter
- 2.798 km SE of Akutan, Alaska11d ago · 4 km W of this epicenter
- 3.2122 km SE of Akutan, Alaska13d ago · 28 km S of this epicenter
- 2.5119 km SSE of Akutan, Alaska16d ago · 47 km SW of this epicenter
- 2.5102 km SE of Akutan, Alaska18d ago · 3 km NE of this epicenter
- 2.884 km SE of Akutan, Alaska20d ago · 19 km W of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 547 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 · 120 km E of this epicenter
- 7.881 km E of Nikolski, AlaskaJuly 2, 1965 · 208 km W of this epicenter
- 7.32025 Sand Point, Alaska EarthquakeJuly 16, 2025 · 297 km NE of this epicenter
- 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 272 km NE of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 257 km NE of this epicenter
- 7.139 km S of Akutan, AlaskaMarch 22, 1957 · 80 km W of this epicenter
- 7.071 km SE of King Cove, AlaskaMay 30, 1991 · 230 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 13 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 · 120 km away · intensity VI
168 deaths$26 million damagetsunami
- 2023M7.2
Alaska Peninsula
16 Jul 2023 · 275 km away · intensity VI
1 deathtsunami
- 1965M6.5
Aleutian Islands: Fox Islands
2 Jul 1965 · 201 km away
Limited damage (under $1M)tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 289 km away
tsunami
- 1902M7.8
Aleutian Islands: Fox Islands
1 Jan 1902 · 228 km away
- 1948M7.5
Alaska Peninsula
14 May 1948 · 262 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.