2.8

M2.8 Earthquake 144 km SW of Nikolski, Alaska — July 21, 2025

2025-07-21 22:02:23 UTC (2025-07-21) · approx. 11:02 AM UTC-11 local

MagnitudeM2.8(ml)
Time22:02 UTC≈ 11:02 AM UTC-11
Depth35.0 kmshallow crustal
Coordinates52.188°, -170.595°
Felt byNo felt reports
Status✓ Reviewed by USGS
Map showing earthquake epicenter at 52.19°, -170.60°

Earthquake Details

Magnitude
2.8 ml
Depth
35.0 km
shallow crustal
Location
52.1876°N
-170.5951°E

Technical Information

Event ID
us7000qsic
Event Type
earthquake
Status
✓ Reviewed
Significance
121
Stations Used
21
Azimuthal Gap
212.0°
Min Station Distance
0.731°
RMS Residual
0.71 sec
Last Updated
2025-10-03 18:43:28 UTC

Nearby Earthquakes (Last 7 Days)

5.0
94 km SSE of Adak, Alaska
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3.2
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16 hours ago · 30.0 km deep
5.1
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4.6
95 km SE of Atka, Alaska
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2.8
186 km S of Atka, Alaska
2 days ago · 7.3 km deep
3.0
143 km SW of Nikolski, Alaska
3 days ago · 27.4 km deep
3.5
99 km SW of Atka, Alaska
3 days ago · 20.6 km deep
2.8
140 km SE of Akutan, Alaska
3 days ago · 18.9 km deep
2.5
75 km SE of Adak, Alaska
3 days ago · 14.9 km deep
3.7
65 km WSW of Atka, Alaska
3 days ago · 8.2 km deep

Actions

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Location

Alaska
View all Alaska earthquakes

Understanding This Data

Magnitude 2.8 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us7000qsic). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, July 21, 2025). M2.8 Earthquake 144 km SW of Nikolski, Alaska — July 21, 2025. Retrieved October 3, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qsic/