M3.9 earthquake 67 km SW of Covenant Life, Alaska

A magnitude 3.9 earthquake struck 67 km SW of Covenant Life, Alaska on Thu, Aug 29, 2019, 8:36 PM AKDT (04:36 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M5.0 64 km WSW of Covenant Life, Alaska. This one was a foreshock.

Map

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

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
3.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.9	Mwr, regional moment	USGS National Earthquake Information Center	Reviewed · ±0.039 · 63 stations
4.0	Mwr, regional moment	USGS National Earthquake Information Center	Moment tensor · Reviewed

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

This event was felt in Haines, Elfin Cove, and Douglas

From the USGS event page for ak019b4ank7c. U.S. Geological Survey text and figures are in the public domain.

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

12 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

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

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

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 59 in the 60 days after this one and 5 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak019b4ank7c (also filed as us70005a1l). Read Mon, Oct 5, 2026, 3:41 AM UTC.