Earthquake · 17 Oct 2026
M4.1 earthquake — Rat Islands, Aleutian Islands, Alaska
- Event
- Earthquake
- Magnitude
- M4.1 (Light)
- Severity
- Moderate
- Time
- (17 days ago)
- Location
- Rat Islands, Aleutian Islands, Alaska
- Country
- United States
- Coordinates
- 51.714°, 178.589°
- Source
- USGS Earthquake Hazards Program
What this means
This was a light earthquake of magnitude 4.1. 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)
- M2.6 earthquake — 290 km W of Adak, Alaska — 42 km away, 31 Oct 2026, 01:07 UTC
- M4.6 earthquake — 153 km WNW of Adak, Alaska — 186 km away, 25 Oct 2026, 17:49 UTC
- M2.8 earthquake — 54 km SW of Adak, Alaska — 291 km away, 20 Oct 2026, 03:44 UTC
- M4.2 earthquake — Rat Islands, Aleutian Islands, Alaska — 27 km away, 19 Oct 2026, 16:27 UTC
- M4.5 earthquake — Rat Islands, Aleutian Islands, Alaska — 48 km away, 19 Oct 2026, 16:27 UTC
- M3.0 earthquake — 53 km SW of Adak, Alaska — 291 km away, 19 Oct 2026, 00:59 UTC
- M2.5 earthquake — 128 km W of Adak, Alaska — 200 km away, 18 Oct 2026, 09:34 UTC
- M4.0 earthquake — Rat Islands, Aleutian Islands, Alaska — 10 km away, 17 Oct 2026, 09:52 UTC
- M2.5 earthquake — Rat Islands, Aleutian Islands, Alaska — 40 km away, 16 Oct 2026, 02:08 UTC
- M3.8 earthquake — Rat Islands, Aleutian Islands, Alaska — 113 km away, 14 Oct 2026, 11:20 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, 06:54 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