M2.4 earthquake 4 km SW of Point MacKenzie, Alaska

A magnitude 2.4 earthquake struck 4 km SW of Point MacKenzie, Alaska on Sun, Jul 19, 2020, 7:43 PM AKDT (03:43 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M4.0 7 km S of Big Lake, 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
2.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.032 · 128 stations

1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 91 in the 30 days before it.

The first 60 of 183.

From the USGS Earthquake Hazards Program and its partner networks, event ak0209a4lmxd (also filed as us7000arf9). Read Sat, Oct 3, 2026, 3:58 PM UTC.