M3.3 earthquake 255 km SSE of False Pass, Alaska
A magnitude 3.3 earthquake struck 255 km SSE of False Pass, Alaska on Thu, Aug 3, 2017, 5:55 PM AKDT (01:55 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.7 235 km SE of Akutan, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-08-04 01:55:01 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 52.615° N, 162.592° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
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 |
|---|---|---|---|
| 3.3 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.128 · 8 stations |
| 3.2 | ML, local (Richter) | Alaska Earthquake Center | Preliminary |
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.3 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 225°, poorly surrounded by stations
- Stations used
- 43
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.1215 km SE of Akutan, Alaska · 3343 days ago · 19 km deep · 68 km away
- 2.4239 km SE of Akutan, Alaska · 3342 days ago · 12 km deep · 48 km away
- 2.6226 km S of False Pass, Alaska · 3337 days ago · 37 km deep · 29 km away
- 2.7229 km SSE of False Pass, Alaska · 3333 days ago · 35 km deep · 49 km away
- 2.8259 km SSE of False Pass, Alaska · 3332 days ago · 10 km deep · 19 km away
- 2.9258 km S of False Pass, Alaska · 3331 days ago · 10 km deep · 11 km away
- 2.8192 km SSE of False Pass, Alaska · 3330 days ago · 10 km deep · 88 km away
- 3.3250 km S of False Pass, Alaska · 3327 days ago · 10 km deep · 6 km away
- 2.9237 km SSE of False Pass, Alaska · 3323 days ago · 10 km deep · 47 km away
- 3.3183 km SE of Akutan, Alaska · 3309 days ago · 58 km deep · 96 km away
- 2.3197 km SE of Akutan, Alaska · 3309 days ago · 7 km deep · 86 km away
- 2.6163 km SSE of False Pass, Alaska · 3306 days ago · 20 km deep · 93 km away
- 3.7235 km SE of Akutan, Alaska · 3306 days ago · 10 km deep · 40 km away
- 2.5210 km SE of Akutan, Alaska · 3298 days ago · 21 km deep · 94 km away
- 2.8161 km S of False Pass, Alaska · 3297 days ago · 10 km deep · 93 km away
- 3.0254 km SSE of False Pass, Alaska · 3294 days ago · 10 km deep · 26 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000a4wr (also filed as ak16427625, ak0179x906xr). Read Sat, Oct 3, 2026, 1:58 PM UTC.