Observed earthquake
2021 Chignik, Alaska Earthquake
Recent observationReported by 1 agency. Every solution below is that agency's own measurement, stored unaltered.
Magnitude
8.2mww
Depth
35 km
shallow
Origin time
2021-07-29 06:15:49 UTC
5 y ago
Epicentre
55.36°N, 157.89°W
A reporting agency set the tsunami evaluation flag for this earthquake. That flag means the event met criteria for tsunami assessment — it is not itself a tsunami warning. Official tsunami warnings come only from your national tsunami warning centre.
Agency solutions
The same earthquake as measured independently by each agency. Values are never averaged or rewritten.
| Agency | Magnitude | Depth | Origin time | Epicentre | Review status | Source record |
|---|---|---|---|---|---|---|
| USGSUnited States Geological Survey | M8.2 mww | 35 km | 2021-07-29 06:15:49 UTC | 55.36°N, 157.89°W | Reviewed by an analyst | ak0219neiszm ↗ |
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-09-21 15:52:20 UTC
Felt reports
512 people submitted a felt report to United States Geological Survey · community intensity estimate 9.1 · instrumental intensity estimate 7.355.
Felt reports are crowd-sourced and reflect where people had internet access and chose to respond. They are not a complete map of who felt the earthquake.