M3.4 earthquake 236 km W of Langlois, Oregon
A magnitude 3.4 earthquake struck 236 km W of Langlois, Oregon on Tue, Sep 28, 2021, 4:47 PM PDT (23:47 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.8 163 km W of Langlois, Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.4 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-09-28 23:47:46 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 43.236° N, 127.320° W
- Region
- Oregon
- 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.
- Location uncertainty
- About 4.5 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 258°, poorly surrounded by stations
- Stations used
- 42
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 3.0186 km W of Port Orford, Oregon · 1829 days ago · 10 km deep · 52 km away · felt by 1
- 3.7off the coast of Oregon · 1821 days ago · 10 km deep · 73 km away · felt by 1
- 4.8163 km W of Langlois, Oregon · 1807 days ago · 10 km deep · 73 km away · felt by 12
- 3.8250 km WNW of Bandon, Oregon · 1789 days ago · 10 km deep · 54 km away
- 3.2207 km W of Langlois, Oregon · 1776 days ago · 10 km deep · 30 km away
Before
Earthquakes todayOregon earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fpya. Read Mon, Oct 5, 2026, 12:09 AM UTC.