M5.4 earthquake 219 km S of Sand Point, Alaska
A magnitude 5.4 earthquake struck 219 km S of Sand Point, Alaska on Fri, Jun 18, 2021, 2:02 AM AKDT (10:02 UTC), 8 km (5 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.4 (mww), moderate
- Local time
- UTC
- 2021-06-18 10:02:41 UTC
- Depth
- 8.0 km (4.9 mi), shallow
- Epicenter
- 53.365° N, 160.294° W
- Region
- Alaska
- Felt reports
- 1
- Strongest shaking
- III, weak shaking
- PAGER alert
- Green
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- III, weak shaking
- Peak ground acceleration
- 0.3% of gravity
- Peak ground velocity
- -1.3 cm/s
- Map
- Automatic
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt 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
- Oblique normal
- Moment magnitude
- 5.4 Mww
- Nodal plane 1
- Strike 218°, dip 26°, rake -132°
- Nodal plane 2
- Strike 83°, dip 71°, rake -72°
- Landslide alert
- Green
- Liquefaction alert
- Green
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.4 km horizontally, 3.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 69°
- Stations used
- 197
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 9 in the 60 days after this one and 2 in the 30 days before it.
After
- 3.1234 km S of Sand Point, Alaska · 1924 days ago · 10 km deep · 15 km away
- 3.8237 km S of Sand Point, Alaska · 1921 days ago · 10 km deep · 18 km away
- 2.5236 km S of Sand Point, Alaska · 1913 days ago · 29 km deep · 18 km away
- 2.6141 km SSE of Sand Point, Alaska · 1908 days ago · 26 km deep · 97 km away
- 2.5152 km SSE of Sand Point, Alaska · 1908 days ago · 10 km deep · 94 km away
- 2.7139 km SSE of Sand Point, Alaska · 1900 days ago · 24 km deep · 98 km away
- 2.7227 km S of Sand Point, Alaska · 1892 days ago · 26 km deep · 17 km away
- 2.8south of Alaska · 1872 days ago · 10 km deep · 25 km away
- 3.6193 km S of Sand Point, Alaska · 1870 days ago · 10 km deep · 33 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000ee34 (also filed as usauto7000ee34, ak0217rnshyb, iscgem620533545). Read Thu, Sep 24, 2026, 7:10 AM UTC.