M6.1 earthquake 73 km N of Chickaloon, Alaska
A magnitude 6.1 earthquake struck 73 km N of Chickaloon, Alaska on Sun, May 30, 2021, 10:59 PM AKDT (06:59 UTC), 44 km (27 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.1 (mww), strong
- Local time
- UTC
- 2021-05-31 06:59:55 UTC
- Depth
- 44.0 km (27.3 mi), shallow
- Epicenter
- 62.449° N, 148.251° W
- Region
- Alaska
- Felt reports
- 4,618
- Strongest shaking
- VI, strong shaking
- PAGER alert
- Green
- Tsunami flag
- Yes: a large quake in an oceanic region
- Status
- Reviewed by a seismologist
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
- VI, strong shaking
- Peak ground acceleration
- 13.1% of gravity
- Peak ground velocity
- 2.2 cm/s
- Map
- Automatic
Did you feel it?
4,618 people reported to the USGS what they felt; the strongest reported shaking was VI, strong 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
| 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% |
| Range, million USD | Chance |
|---|---|
| Under 1 | 65% |
| 1 to 10 | 30% |
| 10 to 100 | 4% |
| 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% |
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
- 6.1 Mww
- Nodal plane 1
- Strike 47°, dip 37°, rake -83°
- Nodal plane 2
- Strike 219°, dip 54°, rake -95°
- Landslide alert
- Green
- Liquefaction alert
- Green
How well it is located
Reviewed by a seismologist.
- Stations used
- 290
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 3.1 and up: 14 in the 60 days after this one and 2 in the 30 days before it.
After
- 3.873 km N of Chickaloon, Alaska · 1945 days ago · 42 km deep · 0 km away · felt by 10
- 3.476 km N of Chickaloon, Alaska · 1945 days ago · 50 km deep · 3 km away · felt by 1
- 3.277 km N of Chickaloon, Alaska · 1945 days ago · 43 km deep · 4 km away · felt by 26
- 3.169 km N of Chickaloon, Alaska · 1945 days ago · 41 km deep · 4 km away
- 3.175 km N of Chickaloon, Alaska · 1945 days ago · 45 km deep · 2 km away · felt by 1
- 4.675 km N of Chickaloon, Alaska · 1945 days ago · 44 km deep · 3 km away · felt by 77
- 3.475 km N of Chickaloon, Alaska · 1945 days ago · 22 km deep · 2 km away · felt by 2
- 3.276 km N of Chickaloon, Alaska · 1944 days ago · 20 km deep · 3 km away · felt by 1
- 3.969 km N of Chickaloon, Alaska · 1942 days ago · 34 km deep · 4 km away · felt by 16
- 4.075 km N of Chickaloon, Alaska · 1939 days ago · 42 km deep · 2 km away · felt by 6
- 3.413 km N of Susitna North, Alaska · 1938 days ago · 52 km deep · 85 km away · felt by 10
- 3.315 km NE of Susitna North, Alaska · 1932 days ago · 43 km deep · 74 km away · felt by 7
- 3.472 km N of Chickaloon, Alaska · 1932 days ago · 47 km deep · 2 km away · felt by 1
- 3.734 km NE of Chase, Alaska · 1890 days ago · 14 km deep · 76 km away · felt by 10
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ak0216xu2rod (also filed as akak0216xu2rod, iscgem620445810, at00qtym3v, us6000eg52, usauto6000eg52, pt21151001). Read Sun, Sep 27, 2026, 3:08 PM UTC.