M1.5 earthquake 7 km SW of Tampico, Washington
A magnitude 1.5 earthquake struck 7 km SW of Tampico, Washington on Mon, Jul 9, 1973, 2:45 AM PDT (09:45 UTC), 18 km (11 mi) below the surface.
A larger quake followed: M3.9 17 km ENE of Ashford, Washington. 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
- 1973-07-09 09:45:57 UTC
- Depth
- 17.9 km (11.1 mi), shallow
- Epicenter
- 46.483° N, 120.926° 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 1.6 km horizontally
- Magnitude uncertainty
- ±0.09
- Depth from
- From location
- Station coverage gap
- 303°, poorly surrounded by stations
- Stations used
- 14
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 1 in the 30 days before it.
After
- 3.917 km ENE of Ashford, Washington · 19424 days ago · 6 km deep · 78 km away
- 2.417 km ENE of Ashford, Washington · 19424 days ago · 10 km deep · 80 km away
- 2.917 km ENE of Ashford, Washington · 19424 days ago · 7 km deep · 78 km away
- 1.913 km ENE of Ashford, Washington · 19389 days ago · 8 km deep · 80 km away
- 2.612 km SW of Royal City, Washington · 19376 days ago · 3 km deep · 98 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10856513. Read Tue, Sep 22, 2026, 2:17 PM UTC.