M2.7 earthquake 246 km SE of Atka, Alaska
A magnitude 2.7 earthquake struck 246 km SE of Atka, Alaska on Fri, Jun 22, 2018, 9:26 PM HADT (06:26 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.2 183 km SE of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.7 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-06-23 06:26:37 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.886° N, 171.339° 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 |
|---|---|---|---|
| 2.7 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.148 · 6 stations |
| 2.5 | 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 7.0 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- Operator assigned
- Station coverage gap
- 231°, poorly surrounded by stations
- Stations used
- 19
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 5 in the 30 days before it.
After
Before
- 2.6188 km SE of Atka, Alaska · 3039 days ago · 10 km deep · 59 km away
- 2.9153 km SE of Atka, Alaska · 3040 days ago · 35 km deep · 93 km away
- 2.9152 km SE of Atka, Alaska · 3040 days ago · 35 km deep · 94 km away
- 2.9244 km SSW of Nikolski, Alaska · 3047 days ago · 37 km deep · 52 km away
- 3.7195 km ESE of Atka, Alaska · 3051 days ago · 42 km deep · 99 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000fpkk (also filed as ak19805271, ak0187zv8n9s). Read Thu, Oct 1, 2026, 8:11 PM UTC.