Reviewed by USGSAlaska29d ago
M2.9 earthquake 107 km ESE of Akutan, Alaska
Friday, August 28, 2026, 21:44:07 UTC · 53.723°N, 164.290°W
A magnitude 2.9 earthquake struck 107 km ESE of Akutan, Alaska on Friday, August 28, 2026, 21:44:07 UTC, at a depth of 35.0 km (shallow).
- Magnitude
- 2.9
- Minor · ml
- Depth
- 35 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
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
84 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
35 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 20 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.
- 3.8151 km S of False Pass, Alaska3d ago · 46 km SE of this epicenter
- 2.596 km SSW of False Pass, Alaska9d ago · 49 km NE of this epicenter
- 2.598 km SE of Akutan, Alaska10d ago · 43 km SW of this epicenter
- 2.5106 km SSW of False Pass, Alaska11d ago · 32 km N of this epicenter
- 2.798 km SE of Akutan, Alaska11d ago · 36 km SW of this epicenter
- 2.7115 km S of False Pass, Alaska17d ago · 42 km E of this epicenter
- 2.5102 km SE of Akutan, Alaska18d ago · 30 km SW of this epicenter
- 2.5103 km E of Akutan, Alaska19d ago · 35 km N of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 512 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 · 100 km E of this epicenter
- 7.881 km E of Nikolski, AlaskaJuly 2, 1965 · 237 km W of this epicenter
- 7.32025 Sand Point, Alaska EarthquakeJuly 16, 2025 · 266 km E of this epicenter
- 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 242 km E of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 225 km NE of this epicenter
- 7.139 km S of Akutan, AlaskaMarch 22, 1957 · 98 km W of this epicenter
- 7.071 km SE of King Cove, AlaskaMay 30, 1991 · 198 km NE 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, which together caused about 169 recorded deaths. The most severe:
- 1946M8.6
Unimak Island
1 Apr 1946 · 100 km away · intensity VI
168 deaths$26 million damagetsunami
- 2023M7.2
Alaska Peninsula
16 Jul 2023 · 244 km away · intensity VI
1 deathtsunami
- 1965M6.5
Aleutian Islands: Fox Islands
2 Jul 1965 · 230 km away
Limited damage (under $1M)tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 256 km away
tsunami
- 1902M7.8
Aleutian Islands: Fox Islands
1 Jan 1902 · 260 km away
- 1948M7.5
Alaska Peninsula
14 May 1948 · 231 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.