M1.9 earthquake 10 km WSW of Porter, Washington
A magnitude 1.9 earthquake struck 10 km WSW of Porter, Washington on Fri, Jul 1, 1977, 9:26 PM PDT (04:26 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.7 17 km S of Mossyrock, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (md), micro
- Local time
- UTC
- 1977-07-02 04:26:54 UTC
- Depth
- -0.2 km (-0.1 mi), shallow
- Epicenter
- 46.891° N, 123.432° 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 3.4 km horizontally, 7.4 km in depth
- Depth from
- From location
- Station coverage gap
- 207°, 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: 9 in the 60 days after this one and 6 in the 30 days before it.
After
- 2.25 km SSE of Seabeck, Washington · 17974 days ago · 12 km deep · 92 km away
- 2.717 km S of Mossyrock, Washington · 17974 days ago · 14 km deep · 93 km away
- 2.34 km SW of Orting, Washington · 17969 days ago · 0 km deep · 92 km away
- 1.92 km ESE of Belfair, Washington · 17969 days ago · -1 km deep · 78 km away
- 1.73 km WSW of Rosedale, Washington · 17967 days ago · 19 km deep · 74 km away
- 2.02 km W of Artondale, Washington · 17965 days ago · 20 km deep · 74 km away
- 1.65 km S of Gorst, Washington · 17955 days ago · 22 km deep · 84 km away
- 1.75 km NNW of Belfair, Washington · 17943 days ago · 22 km deep · 81 km away
- 1.912 km NE of East Cathlamet, Washington · 17928 days ago · 23 km deep · 70 km away
Before
- 2.011 km WSW of Porter, Washington · 17995 days ago · 0 km deep · 0 km away
- 1.56 km WNW of Belfair, Washington · 17995 days ago · 18 km deep · 76 km away
- 1.510 km NW of Belfair, Washington · 17998 days ago · 24 km deep · 80 km away
- 2.81 km NNW of Wauna, Washington · 17999 days ago · 44 km deep · 81 km away
- 2.12 km S of Lakeland North, Washington · 18005 days ago · 8 km deep · 99 km away
- 2.69 km SSW of Morton, Washington · 18011 days ago · 0 km deep · 96 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10843973. Read Tue, Sep 29, 2026, 3:21 AM UTC.