Earthquake · 31 Oct 2026
M4.5 earthquake — 121 km SE of Atka, Alaska
- Event
- Earthquake
- Magnitude
- M4.5 (Light)
- Severity
- Moderate
- Time
- (2 days ago)
- Location
- 121 km SE of Atka, Alaska
- Country
- United States
- Coordinates
- 51.521°, -172.815°
- Source
- USGS Earthquake Hazards Program
What this means
This was a light earthquake of magnitude 4.5. Usually causes noticeable shaking and rattling of indoor objects, but significant damage is unlikely.
Magnitude measures the energy released at the source. How strongly the ground shook at any particular place depends on distance from the epicenter, the depth of the quake, local geology and building construction, so the same magnitude can be harmless in one place and damaging in another. First magnitudes are preliminary and are often revised by a few tenths as more stations report.
Other events within 300 km (±14 days)
- M3.7 earthquake — 183 km SW of Nikolski, Alaska — 133 km away, 1 Nov 2026, 02:29 UTC
- M4.5 earthquake — 111 km ESE of Atka, Alaska — 20 km away, 31 Oct 2026, 18:51 UTC
- M3.4 earthquake — 101 km SSW of Nikolski, Alaska — 248 km away, 31 Oct 2026, 15:10 UTC
- M3.4 earthquake — 100 km SSW of Nikolski, Alaska — 247 km away, 31 Oct 2026, 15:10 UTC
- M3.3 earthquake — 44 km SSW of Nikolski, Alaska — 275 km away, 31 Oct 2026, 05:12 UTC
- M4.2 earthquake — 158 km SSE of Atka, Alaska — 91 km away, 27 Oct 2026, 21:07 UTC
- M3.4 earthquake — 110 km SSW of Nikolski, Alaska — 252 km away, 27 Oct 2026, 18:41 UTC
- M3.5 earthquake — 11 km NNE of Atka, Alaska — 126 km away, 24 Oct 2026, 05:57 UTC
- M2.7 earthquake — 7 km ESE of Atka, Alaska — 114 km away, 24 Oct 2026, 05:57 UTC
- M2.8 earthquake — 29 km WNW of Atka, Alaska — 150 km away, 24 Oct 2026, 03:05 UTC
Smaller earthquakes close in time and space to a larger one are often aftershocks or foreshocks, though GlobalRisk does not classify them.
More from United States
GlobalRisk has recorded 602 events in or near United States in the data we hold. See the full United States risk monitor.
Source and attribution
Source: USGS Earthquake Hazards Program. View the original report ↗
GlobalRisk republishes only basic facts (type, time, location, magnitude or alert level) and links to the original report. Details may be revised by the source after this page was generated on 3 Nov 2026, 05:05 UTC.
Related guides
- Earthquake Magnitude Explained: What M4, M6 and M7 Really Mean
- Earthquake Safety: What to Do Before, During and After
For situational awareness only, not an official warning. Follow local authorities. Open the live map