Alaska earthquakes

M7.1 earthquake 1 km SE of Point MacKenzie, Alaska

A magnitude 7.1 earthquake struck 1 km SE of Point MacKenzie, Alaska on Fri, Nov 30, 2018, 8:29 AM AKST (17:29 UTC), 47 km (29 mi) below the surface.

Point MacKenzie forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 7.1 (mw), major
Local time: Fri, Nov 30, 2018, 8:29 AM AKST
UTC: 2018-11-30 17:29:29 UTC
Depth: 46.7 km (29.0 mi), shallow
Epicenter: 61.346° N, 149.955° W
Region: Alaska
Felt reports: 2,342
Strongest shaking: VIII, severe shaking
PAGER alert: Orange
Tsunami flag: Yes: a large quake in an oceanic region
Status: Reviewed by a seismologist

Deaths and damage

From NOAA NCEI’s Significant Earthquake Database (record 10376), matched to this event by time and place.

Injuries: 117
Damage: $150 million
Houses destroyed: 2
Houses damaged: 1,650

Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.

NOAA’s full record of this earthquake

Tsunami

The USGS flags a quake this large in an oceanic region. The flag does not mean a tsunami happened; the tsunami warning centers decide that, and their messages are below when they issued any.

Current tsunami warnings: tsunami.gov. Warnings in force in the US also appear on our alerts pages.

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VIII, severe shaking
Peak ground acceleration: 37.6% of gravity
Peak ground velocity: 4.0 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

2,342 people reported to the USGS what they felt; the strongest reported shaking was VIII, severe shaking.

Estimated impact

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

Alert level: Orange: significant damage and deaths likely, a national response

Deaths: estimated chance of each range
Range	Chance
Under 1	69%
1 to 10	29%
10 to 100	2%
100 to 1,000	Under 1%
1,000 to 10,000	Under 1%
10,000 to 100,000	Under 1%
100,000 to 10,000,000	Under 1%

Economic losses: estimated chance of each range
Range, million USD	Chance
Under 1	2%
1 to 10	10%
10 to 100	28%
100 to 1,000	35%
1,000 to 10,000	20%
10,000 to 100,000	5%
100,000 to 10,000,000	Under 1%

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Normal
Moment magnitude: 7.0 Mww
Nodal plane 1: Strike 6°, dip 28°, rake -93°
Nodal plane 2: Strike 189°, dip 62°, rake -88°
Landslide alert: Orange
Liquefaction alert: Orange

How well it is located

Reviewed by a seismologist.

Stations used: 389

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 4.1 and up: 32 in the 60 days after this one and 0 in the 30 days before it.

After

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018fcnsk91 (also filed as ak20419010, at00pj0ol4, us1000hyfh, pt18334000, iscgem616643636). Read Tue, Sep 29, 2026, 1:05 PM UTC.