M1.7 earthquake 22 km ENE of Kalama, Washington
A magnitude 1.7 earthquake struck 22 km ENE of Kalama, Washington on Fri, Apr 6, 1973, 6:35 AM PST (14:35 UTC), 32 km (20 mi) below the surface.
A larger quake followed: M3.0 29 km S of Morton, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (md), micro
- Local time
- UTC
- 1973-04-06 14:35:08 UTC
- Depth
- 31.7 km (19.7 mi), shallow
- Epicenter
- 46.103° N, 122.584° 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 0.1 km horizontally, 0.1 km in depth
- Magnitude uncertainty
- ±0.28
- Depth from
- From location
- Station coverage gap
- 273°, poorly surrounded by stations
- Stations used
- 4
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 3.029 km S of Morton, Washington · 19525 days ago · 16 km deep · 36 km away
- 2.110 km SE of Mineral, Washington · 19524 days ago · 26 km deep · 70 km away
- 2.414 km NNE of Ashford, Washington · 19518 days ago · 1 km deep · 99 km away
- 3.429 km S of Morton, Washington · 19514 days ago · 13 km deep · 35 km away
- 2.516 km SSW of Packwood, Washington · 19490 days ago · -2 km deep · 78 km away
- 2.18 km ENE of Kalama, Washington · 19482 days ago · 13 km deep · 14 km away
- 1.833 km NE of Amboy, Washington · 19477 days ago · 8 km deep · 33 km away
- 2.036 km SSE of Morton, Washington · 19469 days ago · 6 km deep · 39 km away
Before
- 1.93 km ENE of McKenna, Washington · 19538 days ago · 31 km deep · 94 km away
- 2.142 km NE of Amboy, Washington · 19549 days ago · 2 km deep · 42 km away
- 2.212 km NE of Ashford, Washington · 19550 days ago · 6 km deep · 97 km away
- 1.76 km SE of Mineral, Washington · 19555 days ago · 16 km deep · 72 km away
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10840153. Read Tue, Sep 22, 2026, 7:08 AM UTC.