M1.9 earthquake 30 km E of Slana, Alaska
A magnitude 1.9 earthquake struck 30 km E of Slana, Alaska on Thu, Oct 21, 2021, 5:20 AM AKDT (13:20 UTC), 3 km (2 mi) below the surface.
A larger quake followed: M2.2 14 km SSE of Mentasta Lake, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (ML, local (Richter)), micro
- Magnitude from
- Alaska Earthquake Center
- Local time
- UTC
- 2021-10-21 13:20:26 UTC
- Depth
- 2.9 km (1.8 mi), shallow
- Epicenter
- 62.684° N, 143.364° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 39
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.040 km WNW of Mentasta Lake, Alaska · 1803 days ago · 6 km deep · 73 km away
- 1.837 km WNW of Mentasta Lake, Alaska · 1786 days ago · 0 km deep · 70 km away
- 2.038 km WNW of Mentasta Lake, Alaska · 1785 days ago · 3 km deep · 70 km away
- 2.214 km SSE of Mentasta Lake, Alaska · 1776 days ago · 12 km deep · 20 km away
- 1.524 km N of Nabesna, Alaska · 1768 days ago · 6 km deep · 19 km away
- 1.829 km ESE of Nabesna, Alaska · 1757 days ago · 0 km deep · 64 km away
- 2.142 km WNW of Mentasta Lake, Alaska · 1749 days ago · 7 km deep · 75 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ak021difv0fm. Read Sun, Oct 4, 2026, 4:30 AM UTC.