2.8

M2.8 Earthquake 77 km SSW of Adak, Alaska — December 20, 2025

2025-12-20 22:20:38 UTC (2025-12-20) · approx. 10:20 AM UTC-12 local

MagnitudeM2.8(ml)
Time22:20 UTC≈ 10:20 AM UTC-12
Depth35.0 kmshallow crustal
Coordinates51.243°, -177.120°
Felt byNo felt reports
Status✓ Reviewed by USGS
Map showing earthquake epicenter at 51.24°, -177.12°

Earthquake Details

Magnitude
2.8 ml
Depth
35.0 km
shallow crustal
Location
51.2427°N
-177.1205°E

Technical Information

Event ID
us6000s9qm
Event Type
earthquake
Status
✓ Reviewed
Significance
121
Stations Used
20
Azimuthal Gap
225.0°
Min Station Distance
0.524°
RMS Residual
0.31 sec
Last Updated
2026-03-19 13:56:08 UTC

Nearby Earthquakes (Last 7 Days)

3.1
64 km S of Adak, Alaska
19 hours ago · 16.1 km deep
3.1
178 km E of Atka, Alaska
19 hours ago · 4.9 km deep
3.9
170 km E of Atka, Alaska
1 day ago · 9.6 km deep
4.2
170 km E of Atka, Alaska
1 day ago · 10.3 km deep
4.5
164 km E of Atka, Alaska
1 day ago · 10.0 km deep
5.6
173 km E of Atka, Alaska
1 day ago · 14.9 km deep
3.0
79 km WSW of Adak, Alaska
1 day ago · 79.2 km deep
3.5
160 km SW of Adak, Alaska
2 days ago · 10.0 km deep
2.9
Rat Islands, Aleutian Islands, Alaska
2 days ago · 38.6 km deep
2.9
118 km SW of Adak, Alaska
2 days ago · 28.7 km deep

Actions

View on USGSDid You Feel It?

Location

Alaska
View all Alaska earthquakes

Understanding This Data

Magnitude 2.8 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Be Prepared

→ What to do during an earthquake→ Create an emergency plan→ Emergency kit essentials→ See all M4.5+ earthquakes today

Authoritative source: USGS event page (event ID: us6000s9qm). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, December 20, 2025). M2.8 Earthquake 77 km SSW of Adak, Alaska — December 20, 2025. Retrieved May 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000s9qm/