M3.1 earthquake 4 km SW of Lake Cavanaugh, Washington
A magnitude 3.1 earthquake struck 4 km SW of Lake Cavanaugh, Washington on Mon, Jan 20, 1992, 8:35 AM PST (16:35 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.5 10 km W of Ault Field, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.1 (Md, duration), minor
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1992-01-20 16:35:49 UTC
- Depth
- 10.5 km (6.5 mi), shallow
- Epicenter
- 48.300° N, 122.074° W
- Region
- Washington
- 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 |
|---|---|---|---|
| 3.1 | Md, duration | Pacific Northwest Seismic Network | Preferred · Final · ±0.05 · 20 stations |
| 3.0 | mb, body-wave | USGS National Earthquake Information Center | Reviewed · 1 stations |
What happened
The USGS’s account of the effects of this earthquake.
Felt.
From the USGS event page for uw10287183. 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.
- Location uncertainty
- About 0.6 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 54°
- Stations used
- 32
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 6 in the 30 days before it.
After
- 1.55 km NE of Snoqualmie, Washington · 12668 days ago · 9 km deep · 85 km away
- 1.92 km SE of Bryant, Washington · 12666 days ago · -1 km deep · 9 km away
- 1.54 km WSW of Lake Cavanaugh, Washington · 12655 days ago · 11 km deep · 1 km away
- 1.77 km WNW of Picnic Point, Washington · 12649 days ago · 26 km deep · 50 km away
- 2.76 km SSE of Quilcene, Washington · 12649 days ago · 15 km deep · 81 km away
- 1.95 km WSW of Darrington, Washington · 12644 days ago · 3 km deep · 31 km away
- 2.211 km W of Ault Field, Washington · 12639 days ago · 18 km deep · 56 km away
- 2.212 km E of Tanner, Washington · 12629 days ago · 13 km deep · 100 km away
- 1.6Puget Sound region, Washington · 12626 days ago · 0 km deep · 71 km away
- 2.38 km SSW of Camano, Washington · 12625 days ago · 13 km deep · 42 km away
- 2.47 km NW of Lofall, Washington · 12623 days ago · 54 km deep · 69 km away
- 3.510 km W of Ault Field, Washington · 12622 days ago · 18 km deep · 55 km away
- 1.511 km W of Ault Field, Washington · 12614 days ago · 17 km deep · 56 km away
Before
- 2.717 km NNW of Marblemount, Washington · 12676 days ago · 6 km deep · 57 km away
- 1.618 km NNW of Marblemount, Washington · 12680 days ago · -1 km deep · 58 km away
- 1.53 km SSW of Snoqualmie, Washington · 12681 days ago · 17 km deep · 91 km away
- 1.918 km NNW of Marblemount, Washington · 12682 days ago · 3 km deep · 58 km away
- 1.92 km WSW of Ames Lake, Washington · 12689 days ago · 6 km deep · 75 km away
- 2.26 km S of Victoria, Canada · 12701 days ago · 10 km deep · 96 km away
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10287183 (also filed as usp000520h). Read Fri, Oct 2, 2026, 10:45 PM UTC.