Earthquake · reviewed by a seismologist
M 2.0ml
86 km E of Akutan, Alaska
Yes. A magnitude 2.0 earthquake was recorded 86 km E of Akutan, Alaska, at 3:58 pm AKDT on 20 March 2025 (23:58 UTC), 13 km deep.
- When
- Magnitude
- M 2.0 (ml)
- Depth
- 13 km below the surface
- Felt
- no reports yet
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 598 days ago
Earthquake alerts for Akutan, AK
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
- Magna, Utah 2020 M 5.7 350,000× the energy of this one
- Around the size people start to feel M 3.0 32× the energy of this one
- This earthquake M 2.0 about 30 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.9 on 2023-09-12 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 59 km ESE of Akutan, Alaska · 49 km SW of this epicentre
- 6.5 79 km SW of False Pass, Alaska · 20 km ENE of this epicentre
- 6.4 60 km NE of Akutan, Alaska · 48 km NW of this epicentre
- 6.2 102 km SSW of False Pass, Alaska · 41 km SE of this epicentre
- 6.0 106 km ESE of Akutan, Alaska · 39 km SSE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 54.2449, -164.4627. Map © OpenStreetMap contributors.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 1.6 78 km WSW of False Pass, Alaska
- 1.6 76 km WSW of False Pass, Alaska
- 1.8 75 km WSW of False Pass, Alaska
- 2.0 71 km ESE of Akutan, Alaska
- 1.6 54 km E of Akutan, Alaska
- 1.9 84 km E of Akutan, Alaska
- 2.2 105 km ESE of Akutan, Alaska
- 1.9 83 km ENE of Akutan, Alaska
- 1.9 90 km ESE of Akutan, Alaska
- 2.0 104 km SSW of False Pass, Alaska
- 1.9 99 km ESE of Akutan, Alaska
- 2.2 92 km E of Akutan, Alaska
- 1.9 85 km ESE of Akutan, Alaska
- 2.0 88 km SSW of False Pass, Alaska
- 2.1 71 km E of Akutan, Alaska
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.