Moderate Earthquake ● Monitoring
M5.6 Earthquake — 43 km NNW of Lake Minchumina, Alaska
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Magnitude 5.6 earthquake 43 km NNW of Lake Minchumina, Alaska at a depth of 4.5 km, recorded by the U.S. Geological Survey.
Measurements
| Magnitude | M5.6 |
|---|---|
| Depth | 4.5 km |
| Coordinates | 64.2200, -152.7460 |
| Region | 43 km NNW of Lake Minchumina, Alaska |
| Felt Reports | 105 |
| Tsunami Flag | 0 |
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
This event as JSON · API and licence
Source updated 3 days ago (Oct 16, 2026 06:50 UTC) · we last heard from US Geological Survey 20 seconds ago
On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.
What has changed
- Magnitude revised from M5.5 to M5.6 — Oct 15, 11:12 UTC by US Geological Survey
- Magnitude revised from M5.4 to M5.5 — Oct 15, 11:11 UTC by US Geological Survey
- Magnitude revised from M5.3 to M5.4 — Oct 15, 11:10 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 5.6 following in the week to 26 Oct 2026.
Since the mainshock USGS has recorded 1 aftershock of magnitude 3 or larger.
| 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 | <1% | <1% | <1% |
USGS forecast issued 19 Oct 2026 11:07 UTC, generated automatically. A forecast gives chances, not times: it cannot say when or where an aftershock will strike.
Reports of the shaking
USGS received 106 "Did You Feel It?" reports; the strongest shaking reported was intensity V (moderate).
How far the shaking reached
- Strong shaking (intensity VI) or more reached about 15 km from the epicentre at its farthest.
- Moderate shaking (intensity V) or more reached about 25 km from the epicentre at its farthest.
- Light shaking (intensity IV) or more reached about 70 km from the epicentre at its farthest.
USGS ShakeMap, automatic: an estimate built from seismic stations, felt reports and a model where there are neither. Distances are in a straight line from USGS's epicentre; the lines on the map above are USGS's contours, simplified. Shaking varies with the ground, so a place inside a line may have felt less or more.
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.