# M5.5 Earthquake: 92 km NNW of Aleneva, Alaska Updated 09:05 UTC, 29 Oct 2026. Canonical: https://monitorworld.app/earthquake/2026-10-06-m5-5-aleneva-alaska A **magnitude 5.5** earthquake struck 92 km NNW of Aleneva, Alaska at 18:34 UTC on 6 Oct 2026, at a depth of 88 km, reported by USGS. USGS PAGER issued a green alert: little or no damage and a low chance of deaths. USGS did not set a tsunami flag for this quake. So far 1 aftershock of M2.5+ has been recorded within 50 km, the largest a M2.6. ## Key numbers - Magnitude (USGS): **M5.5** (ml) - Depth: **88 km** (intermediate) - USGS PAGER impact alert: **GREEN** (estimated impact) - Aftershocks M2.5+ so far: **1** (within 50 km) ## Nearest places - [92 KM] Aleneva, Alaska, United States (92 km from the epicentre, quake was NNW of here, population 37) - [340 KM] Anchorage, Alaska, United States (340 km from the epicentre, quake was SW of here, population 291,247) - [360 KM] Eagle River, Alaska, United States (360 km from the epicentre, quake was SW of here, population 24,793) - [375 KM] Knik-Fairview, Alaska, United States (375 km from the epicentre, quake was SW of here, population 14,923) - [1,061 KM] Whitehorse, Yukon, Canada (1,061 km from the epicentre, quake was WSW of here, population 28,201) ## Strongest aftershocks so far - [LOW] [M2.6 ยท 87 km N of Aleneva, Alaska](https://earthquake.usgs.gov/earthquakes/eventpage/aka2026ulaxcs) (2026-10-15 12:18 UTC, 61 km deep, USGS) ## Key context ### Tectonic setting **Aleutian-Alaska megathrust.** The Pacific Plate subducts north beneath the North American Plate along the Aleutian Trench. This megathrust produced the M9.2 Great Alaska Earthquake of 1964, the largest recorded in North America, and the M8.2 Chignik quake of 2021. The USGS moment tensor shows strike-slip faulting: the two sides of the fault slid sideways past each other. At 88 km it was an intermediate-depth quake. These are felt over a wide area, but the shaking at the surface is usually weaker than from a shallow quake of the same size, and they rarely cause tsunamis. ### Shaking and impact USGS PAGER estimates the impact from the shaking and the number of people exposed. For this quake it issued a green alert: little or no damage and a low chance of deaths (fatality alert: green, economic loss alert: green). PAGER is an early estimate and can change as reports come in. The USGS ShakeMap estimates the strongest shaking at intensity IV on the Modified Mercalli scale (light). 342 people sent a "Did You Feel It?" report to USGS, with the strongest reported intensity V (moderate). Estimated shaking in nearby towns, from USGS PAGER. | Town | Population | Estimated intensity | | --- | --- | --- | | Kokhanok | 109 | IV (light) | | Aleneva | 0 | III (weak) | | Pope-Vannoy Landing | 0 | III (weak) | ### Aftershocks This page counts quakes of M2.5 or more within 50 km after the main shock, from the USGS catalog (last checked 09:05 UTC, 29 Oct 2026): 1 aftershock so far. Aftershocks are normal after a quake of this size. They usually become less frequent over days and weeks, but a strong aftershock can still happen, and in a few sequences a later quake is larger. No one can predict their exact time or size; follow the official agency for your area. ### Earthquake history within 250 km Since 1976, USGS lists 122 quakes of M5 or more within 250 km of this epicentre, about 2.4 a year. Since 1900 the same circle had 140 quakes of M5.5 or larger. Largest earlier quakes within 250 km, USGS catalog since 1900 (M6+). | Magnitude | Place (USGS) | Date | Depth | | --- | --- | --- | --- | | M7.9 | Kodiak Island region, Alaska | 1900-10-09 | 20 km | | M7.1 | 47 km ESE of Pedro Bay, Alaska | 2016-01-24 | 126 km | | M7.1 | 4 km ENE of Karluk, Alaska | 1912-11-07 | 35 km | | M7.0 | 153 km SE of Halibut Cove, Alaska | 1906-12-23 | 15 km | | M7.0 | 26 km SSE of Karluk, Alaska | 1999-12-06 | 44 km | | M7.0 | Event 36 Novarupta-Mount Katmai area, Alaska Peninsula | 1912-06-08 | 0 km | | M6.9 | 47 km S of Old Harbor, Alaska | 2001-01-10 | 36 km | | M6.8 | Event 37 Novarupta-Mount Katmai area, Alaska Peninsula | 1912-06-08 | 0 km | ### Official information - [Alaska Earthquake Center](https://earthquake.alaska.edu/) - [National Tsunami Warning Center](https://www.tsunami.gov/) - [EMSC (European-Mediterranean Seismological Centre)](https://www.emsc-csem.org/) - [USGS event page for this quake](https://earthquake.usgs.gov/earthquakes/eventpage/aka2026tuxgky) (ShakeMap, PAGER, felt reports) - [tsunami.gov](https://www.tsunami.gov/) for US tsunami bulletins ### Data status USGS review status: reviewed. Magnitude type: ml. USGS last updated this event on 28 Oct 2026 at 18:44 UTC. Magnitude, depth and location can still be revised; this page keeps the same address if they change. ## FAQ ### How strong was the earthquake near Aleneva, Alaska? USGS measured it at magnitude 5.5 (ml), 88 km deep. The strongest estimated shaking was intensity IV (light). Quakes of M5 to 5.9 are classed as moderate. ### Was there a tsunami? USGS did not set a tsunami flag for this quake. If you are on a coast and feel strong or long shaking, move to high ground anyway, and follow local officials. ### Was the earthquake felt? Yes. 342 people reported it to USGS "Did You Feel It?", with reports up to intensity V. ### Will there be more aftershocks? Aftershocks are likely to continue for days to weeks, becoming less frequent over time. So far 1 aftershock of M2.5+ has been listed. Most sequences do not produce a larger quake, but some do. No one can predict the time or size of the next one; follow Alaska Earthquake Center. ### What should I do after a strong earthquake? Expect aftershocks: Drop, Cover and Hold On when shaking starts again. Check for injuries and damage, stay out of damaged buildings, and use text messages instead of calls so emergency lines stay free. On a coast, move to high ground after strong shaking. Follow your local officials. ## Get the app MonitorWorld is free on iPhone and Android, rated 4.7 from 52 ratings on the US App Store. - App Store: https://apps.apple.com/app/id6760610225 - Google Play: https://play.google.com/store/apps/details?id=app.monitorworld ## Sources - [USGS event page](https://earthquake.usgs.gov/earthquakes/eventpage/aka2026tuxgky): magnitude, location, ShakeMap, PAGER and Did You Feel It? data for this event. Public domain. Credit: U.S. Geological Survey. - [USGS ComCat (FDSN event web service)](https://earthquake.usgs.gov/fdsnws/event/1/): the USGS earthquake catalog, used for the 30-year counts, history and aftershocks. Public domain. Credit: U.S. Geological Survey. - [USGS Geoserve](https://earthquake.usgs.gov/ws/geoserve/): nearest places to the epicentre. - [GeoNames](https://www.geonames.org/): large-city coordinates, CC BY 4.0. ## Related - [Alaska earthquakes](https://monitorworld.app/live/earthquakes/alaska): Live map and the 30-year normal in Alaska. - [M5.6 Lake Minchumina, Alaska](https://monitorworld.app/earthquake/2026-10-15-m5-6-lake-minchumina-alaska): 15 Oct 2026, 604 km from this quake. - [M5.7 Vilyuchinsk, Russia](https://monitorworld.app/earthquake/2026-10-02-m5-7-vilyuchinsk-russia): 2 Oct 2026, 2,991 km from this quake. - [Earthquakes today](https://monitorworld.app/live/earthquakes-today): Every M2.5+ quake of the past 24 hours. - [Earthquakes by region](https://monitorworld.app/live/earthquakes): All regions and every M5.5+ quake page. - [Tsunami warning today](https://monitorworld.app/live/tsunami-warning): Latest US tsunami bulletins. - [Earthquake near me](https://monitorworld.app/live/earthquake-near-me): Sort recent quakes by distance from you.