Moderate Earthquake ● Closed
M5.5 Earthquake — 92 km NNW of Aleneva, Alaska
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Magnitude 5.5 earthquake 92 km NNW of Aleneva, Alaska at a depth of 87.6 km, recorded by the U.S. Geological Survey.
Measurements
| Magnitude | M5.5 |
|---|---|
| Depth | 87.6 km |
| Coordinates | 58.8020, -153.6090 |
| Region | 92 km NNW of Aleneva, Alaska |
| Felt Reports | 341 |
| Tsunami Flag | 0 |
| Usgs Alert | green |
Measured by
Earthquake data courtesy of the U.S. Geological Survey
This is a scientific measurement of an event that has already happened. It is not a warning, and it does not tell you what to do.
Not rated by source. US Geological Survey does not publish a severity for this; the level shown is our own classification.
View original reportAlso reported by: EMSC GDACS
This event as JSON · API and licence
Source updated 12 days ago (Oct 7, 2026 16:58 UTC) · we last heard from US Geological Survey 58 seconds ago
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What has changed
- Magnitude revised from M5.4 to M5.5 — Oct 6, 18:37 UTC by US Geological Survey
Figures published in the first minutes of an event are preliminary. A change here is the agency refining its own estimate, not a correction to this page.
What USGS has published since this earthquake
Aftershock forecast
USGS gives less than a 1% chance of at least one aftershock of magnitude 5 or larger in the week to 26 Oct 2026, less than a 1% chance of magnitude 6 or larger, and less than a 1% chance of magnitude 7 or larger.
USGS puts less than a 1% chance on an earthquake larger than this magnitude 5.5 following in the week to 26 Oct 2026.
| Chance of at least one aftershock in | M5+ | M6+ | M7+ |
|---|---|---|---|
| the day to 20 Oct 2026 | <1% | <1% | <1% |
| the week to 26 Oct 2026 | <1% | <1% | <1% |
| the month to 18 Nov 2026 | <1% | <1% | <1% |
| the year to 19 Oct 2027 | 2% | <1% | <1% |
USGS forecast issued 19 Oct 2026 18:34 UTC, generated automatically. A forecast gives chances, not times: it cannot say when or where an aftershock will strike.
Shaking and its likely impact
USGS estimates fewer than 1,000 people were exposed to strong shaking or worse (intensity VI and above).
USGS's PAGER system gives a green alert for deaths, meaning a low likelihood of casualties; and a green alert for economic losses, meaning a low likelihood of damage. These are estimates from a model of the shaking and the population it reached, not a count.
USGS PAGER, automatic.
Reports of the shaking
USGS received 342 "Did You Feel It?" reports; the strongest shaking reported was intensity V (moderate).
From the U.S. Geological Survey. The USGS event page has the maps and everything USGS has published for this earthquake.
General safety information
No authority has issued instructions for this event. The guidance below is general background reading, not a response to it.
Drop, Cover, and Hold On — what to do before, during and after an earthquake, plus emergency kit and family plan checklists.
Open Earthquake Safety Guide →Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.