Which active faults threaten Anchorage?

The fault systems associated with Anchorage are named in the hub header and drawn on the map alongside recorded seismicity. Proximity alone does not rank hazard: rupture length, slip rate and the time elapsed since the last event all matter, so the page shows the traces and the observed activity rather than a single ranking.

Who is the emergency service for Anchorage?

The civil protection agency responsible for Anchorage, with its emergency number, is shown on this page. Call it for any life-threatening situation; for official damage reports and aftershock bulletins, follow the national seismological agency listed among our data sources.

Photo:Kalash Studiovia Unsplash

Back to Regions List UNITED STATES

Anchorage

The 1964 Good Friday earthquake, Mw 9.2, remains the largest ever recorded in North America; the Alaska-Aleutian megathrust that produced it runs beneath the region, and the intraslab 2018 event shook the city from 47 km down.

Danger Level (72h)

72-hour composite hazard forecast

Recent Quakes (14d)

Recorded in the selected 14d period

Max Magnitude (14d)

Largest earthquake in the selected 14d period

Tectonic Profile

Seismotectonic hazard assessment, structural exposure & historical context

Associated Faults2

Click to locate on map

Regional PopulationLandScan

Living within 250 km of the city centre

Building VulnerabilityModerate

Mixed construction stock with regional engineering standards

Tectonic Setting

Subduction Zone

Critical Hazard

Major plate boundary with high strain accumulation

Seismically Stable Period

No significant earthquakes recorded in the selected 14d period.

PAGER GREEN

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Oct 22, 08:35:04 PM

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Seismic Activity

Every recorded earthquake in this area — filter by time range and sort by time or severity.

No earthquake activity data available for this period.

Regional Volcanism & Monitored Vents

Active vents and Holocene volcanic structures within the monitored boundary (Anchorage) · 5

Last eruptionVolcano & TypeDetailsSummit

2009

Redoubt

Stratovolcano•United States

GVP

3.1 km

2006

Augustine

Lava dome•United States

GVP

1.2 km

1992

Spurr

Stratovolcano•United States

GVP

3.4 km

1876

Iliamna

Stratovolcano•United States

GVP

3.1 km

1200

Hayes

Stratovolcano•United States

GVP

3.0 km

Catalogue: Smithsonian Institution, Global Volcanism Program.Volcanoes of the World

Emergency services

Alaska DHS&EM

911 Official site

Frequently Asked Questions (FAQ)

Verified scientific, operational, and emergency protocols

The event table on this page lists every earthquake recorded inside the felt radius of Anchorage, newest first, with its distance from the city centre and its magnitude. The top row is therefore the most recent event, and the list updates as soon as a reporting agency publishes a solution.