M1.5 earthquake 0 km W of Lyman, Washington
A magnitude 1.5 earthquake struck 0 km W of Lyman, Washington on Sat, Oct 30, 1999, 7:27 PM PDT (02:27 UTC), 1 km (1 mi) below the surface.
A larger quake followed: M3.7 10 km NNE of Oak Bay, Canada. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.5 (md), micro
- Local time
- UTC
- 1999-10-31 02:27:00 UTC
- Depth
- 1.3 km (0.8 mi), shallow
- Epicenter
- 48.526° N, 122.074° 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 0.9 km horizontally, 1.0 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 167°
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.52 km SW of Monroe North, Washington · 9811 days ago · 19 km deep · 73 km away
- 1.826 km NNE of Index, Washington · 9810 days ago · 5 km deep · 73 km away
- 1.93 km ENE of Monroe North, Washington · 9794 days ago · 16 km deep · 70 km away
- 3.710 km NNE of Oak Bay, Canada · 9786 days ago · 49 km deep · 86 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10491213. Read Sat, Sep 26, 2026, 5:24 PM UTC.