Alaska earthquakes

M4.9 earthquake 56 km SSW of Nanwalek, Alaska

A magnitude 4.9 earthquake struck 56 km SSW of Nanwalek, Alaska on Fri, Apr 29, 2016, 12:17 AM AKDT (08:17 UTC), 55 km (34 mi) below the surface.

Homer 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: 4.9 (ML, local (Richter)), light
Magnitude from: Alaska Earthquake Center
Local time: Fri, Apr 29, 2016, 12:17 AM AKDT
UTC: 2016-04-29 08:17:33 UTC
Depth: 54.5 km (33.9 mi), shallow
Epicenter: 58.899° N, 152.338° W
Region: Alaska
Felt reports: 12
Strongest shaking: IV, light shaking
PAGER alert: Green
Tsunami flag: Yes: a large quake in an oceanic region
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
4.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
4.7	Mwr, regional moment	USGS National Earthquake Information Center	Reviewed · ±0.034 · 81 stations
4.8	ML, local (Richter)	NOAA National Tsunami Warning Center	Reviewed · 13 stations

What happened

The USGS’s account of the effects of this earthquake.

Felt (III) at Homer. Also felt at Anchorage, Anchor Point and Soldotna. Felt widely on the Kenai Peninsula.

From the USGS event page for ak0165ilcttk. U.S. Geological Survey text and figures are in the public domain.

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: IV, light shaking
Map: Automatic

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

Did you feel it?

12 people reported to the USGS what they felt; the strongest reported shaking was III, weak 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: Green: little or no damage or loss of life expected

Fault motion and ground failure

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

Faulting: Strike-slip
Moment magnitude: 4.7 Mwr
Nodal plane 1: Strike 65°, dip 71°, rake 26°
Nodal plane 2: Strike 326°, dip 66°, rake 159°

How well it is located

Reviewed by a seismologist.

Stations used: 217

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 45 in the 60 days after this one and 38 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0165ilcttk (also filed as ak13503280, at00o6dz18, us10005ceb). Read Sun, Oct 4, 2026, 10:34 PM UTC.