M4.3 earthquake 112 km WSW of Adak, Alaska
A magnitude 4.3 earthquake struck 112 km WSW of Adak, Alaska on Wed, Jul 29, 1998, 7:10 PM HADT (04:10 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 116 km WSW 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
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1998-07-30 04:10:14 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.509° N, 178.155° 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.
- Depth from
- OPERATOR_ASSIGNED
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
- 4.2143 km WSW of Adak, Alaska · 10288 days ago · 33 km deep · 31 km away
- 4.950 km WSW of Adak, Alaska · 10284 days ago · 45 km deep · 63 km away
- 4.3131 km SW of Adak, Alaska · 10258 days ago · 33 km deep · 36 km away
- 4.270 km WNW of Adak, Alaska · 10247 days ago · 33 km deep · 81 km away
- 4.3178 km WSW of Adak, Alaska · 10245 days ago · 33 km deep · 68 km away
- 4.9182 km WSW of Adak, Alaska · 10245 days ago · 33 km deep · 70 km away
- 5.2116 km WSW of Adak, Alaska · 10239 days ago · 33 km deep · 6 km away
- 4.6154 km W of Adak, Alaska · 10239 days ago · 33 km deep · 59 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008sej. Read Fri, Oct 2, 2026, 8:14 AM UTC.