USGS · October 21, 2026
Magnitude 4.5 earthquake 158 km S of False Pass, Alaska
A magnitude 4.5 earthquake was recorded near 158 km S of False Pass, Alaska on Oct 21, 2026, 04:03 AM (local time at the epicentre — AKDT, UTC-8), at a depth of about 20.5 km, according to USGS.
USGSShallow (0–70 km)Reviewed by a seismologist
Updated 2026-10-21 17:42 UTC
The full record
- Magnitude
- M 4.5 · moment magnitude (regional)
- Location
- 158 km S of False Pass, Alaska
- Local time at the epicentre
- Oct 21, 2026, 04:03 AM — AKDT, UTC-8
- Time (UTC)
- 2026-10-21 12:03 UTC
- Depth
- 20.5 km · Shallow (0–70 km)
- Coordinates
- 53.426, -163.461
- Felt reports
- No “Did You Feel It?” reports submitted
- Tsunami
- No tsunami evaluation was flagged for this earthquake.
- Significance
- 312 / 1000 · notable event
- Solution quality
- 94 seismic stations used · 167° azimuthal gap (well-constrained epicentre)
- Review status
- Reviewed by a seismologist
- Catalog
- USGS
Epicentre and nearby recent earthquakes
The highlighted circle is this earthquake. Smaller circles are other events recorded nearby in the last 30 days.
What the shaking was like
Shallow earthquakes release their energy close to the surface, so they are felt more strongly nearby than a deeper earthquake of the same magnitude.
No intensity estimate was published for this event, which is usual for small earthquakes far from populated areas.
Felt it yourself? USGS collects first-hand reports through “Did You Feel It?”, and those reports are what produce the community intensity above.
Who lives nearby
No populated places over 1,000 inhabitants are listed within 100 km of the epicentre.
Earthquake history in this area
12 earthquakes of magnitude 4.5+ have been recorded within 200 km of this epicentre since 1960, in Alaska.
Other earthquakes near this epicentre
10 other events within 100 km in the last 30 days.
M 3.2 159 km S of False Pass, Alaska
M 4.0 195 km SE of Akutan, Alaska
M 3.1 187 km SE of Akutan, Alaska
M 3.1 107 km ESE of Akutan, Alaska
M 4.8 127 km S of False Pass, AlaskaShaking III
M 3.0 112 km SSW of False Pass, Alaska
M 3.5 118 km S of False Pass, Alaska
M 4.1 145 km S of False Pass, AlaskaShaking II
M 3.3 125 km SE of Akutan, Alaska
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Frequently asked questions
How strong was the 158 km S of False Pass, Alaska earthquake?
Magnitude 4.5 (moment magnitude (regional)), at a depth of 20.5 km. Shallow earthquakes release their energy close to the surface, so they are felt more strongly nearby than a deeper earthquake of the same magnitude.
Exactly when did it happen?
Oct 21, 2026, 04:03 AM (local time at the epicentre — AKDT, UTC-8). In universal time: 2026-10-21 12:03 UTC.
Was it felt?
No “Did You Feel It?” reports were submitted for this event. Small earthquakes usually pass unnoticed except very close to the epicentre.
Was there a tsunami warning?
No tsunami evaluation was flagged for this earthquake.
Which towns are closest to the epicentre?
No populated places over 1,000 inhabitants lie within 100 km of the epicentre.
Are earthquakes normal in this area?
Yes. The largest earthquake recorded within 200 km since 1960 was magnitude 7.0 (71 km SE of King Cove, Alaska, 1991), and 10 further events were recorded within 100 km in the last 30 days.
How do I get alerts for the next earthquake here?
Install the free SeismoWatch Android app, draw a box over this area, set a minimum magnitude, and turn alerts on.
About this page
Event data: U.S. Geological Survey (USGS), the European-Mediterranean Seismological Centre (EMSC), in Venezuela FUNVISIS and in Brazil the RSBR through the Centro de Sismologia da USP. Populated places and time zones: GeoNames (CC BY 4.0). Preliminary solutions are revised as more observations arrive.