M4.5 earthquake 69 km SE of Adak, Alaska
A magnitude 4.5 earthquake struck 69 km SE of Adak, Alaska on Sun, Aug 30, 1987, 9:13 PM HADT (06:13 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.3 88 km E of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-08-31 06:13:21 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.410° N, 175.958° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
What happened
The USGS’s account of the effects of this earthquake.
Felt strongly on Adak.
From the USGS event page for usp00037yk. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.8110 km ESE of Adak, Alaska · 14278 days ago · 33 km deep · 48 km away
- 5.143 km E of Adak, Alaska · 14268 days ago · 49 km deep · 58 km away
- 5.065 km SE of Adak, Alaska · 14253 days ago · 33 km deep · 6 km away
- 4.950 km ESE of Adak, Alaska · 14251 days ago · 67 km deep · 42 km away
- 4.963 km SSW of Adak, Alaska · 14250 days ago · 33 km deep · 68 km away
- 3.773 km ESE of Adak, Alaska · 14244 days ago · 33 km deep · 23 km away
- 5.388 km E of Adak, Alaska · 14233 days ago · 64 km deep · 62 km away
- 3.333 km N of Adak, Alaska · 14227 days ago · 33 km deep · 94 km away
- 4.664 km SSE of Adak, Alaska · 14221 days ago · 33 km deep · 16 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00037yk. Read Sat, Oct 3, 2026, 1:34 PM UTC.