M3.3 earthquake 18 km SSW of Packwood, Washington
A magnitude 3.3 earthquake struck 18 km SSW of Packwood, Washington on Wed, Oct 20, 1971, 1:09 AM PDT (08:09 UTC), 0 km (0 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (md), minor
- Local time
- UTC
- 1971-10-20 08:09:54 UTC
- Depth
- 0.2 km (0.1 mi), shallow
- Epicenter
- 46.448° N, 121.743° W
- Region
- Washington
- 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 3.1 km horizontally, 1.6 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 301°, poorly surrounded by stations
- Stations used
- 5
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 1.72 km NNE of Bonney Lake, Washington · 20060 days ago · 10 km deep · 90 km away
- 1.83 km NNE of Bonney Lake, Washington · 20022 days ago · 21 km deep · 90 km away
- 1.67 km SE of Mineral, Washington · 20016 days ago · 32 km deep · 38 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10839963. Read Tue, Sep 22, 2026, 6:34 AM UTC.