M2.8 earthquake 225 km SE of Chignik, Alaska
A magnitude 2.8 earthquake struck 225 km SE of Chignik, Alaska on Sat, Aug 4, 2018, 1:04 AM AKDT (09:04 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.1 204 km SE of Perryville, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.8 (ML, local (Richter)), micro
- Magnitude from
- AACSE
- Local time
- UTC
- 2018-08-04 09:04:11 UTC
- Depth
- 33.1 km (20.6 mi), shallow
- Epicenter
- 54.880° N, 155.848° 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
- 29
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.0289 km S of Akhiok, Alaska · 2982 days ago · 18 km deep · 94 km away
- 3.2214 km SE of Perryville, Alaska · 2976 days ago · 12 km deep · 62 km away
- 2.3178 km SSW of Akhiok, Alaska · 2972 days ago · 39 km deep · 82 km away
- 2.6209 km SE of Perryville, AK · 2966 days ago · 10 km deep · 60 km away
- 3.2263 km SSW of Akhiok, Alaska · 2956 days ago · 4 km deep · 55 km away
- 4.1204 km SE of Perryville, Alaska · 2941 days ago · 25 km deep · 60 km away
- 2.7268 km SE of Perryville, Alaska · 2937 days ago · 12 km deep · 78 km away
- 2.7217 km SE of Chignik, Alaska · 2929 days ago · 33 km deep · 25 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event aacse0189xdgqu0. Read Mon, Oct 5, 2026, 5:36 AM UTC.