M2.8 earthquake 20 km SSW of Prosser, Washington
A magnitude 2.8 earthquake struck 20 km SSW of Prosser, Washington on Mon, Apr 30, 1984, 4:02 AM PDT (11:02 UTC), -1 km (0 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.8 (md), micro
- Local time
- UTC
- 1984-04-30 11:02:32 UTC
- Depth
- -0.5 km (-0.3 mi), shallow
- Epicenter
- 46.041° N, 119.878° 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, 0.5 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 140°
- Stations used
- 29
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 1 in the 30 days before it.
After
- 2.15 km W of Pendleton, Oregon · 15483 days ago · -1 km deep · 88 km away
- 2.013 km WSW of Highland, Washington · 15479 days ago · 18 km deep · 48 km away
- 1.516 km WSW of Othello, Washington · 15474 days ago · 5 km deep · 88 km away
- 1.910 km NNW of Pilot Rock, Oregon · 15467 days ago · 11 km deep · 94 km away
- 2.12 km N of Yakima, WA · 15464 days ago · 4 km deep · 81 km away
- 2.61 km E of Gleed, Washington · 15452 days ago · 7 km deep · 88 km away
- 2.121 km NE of Lexington, Oregon · 15440 days ago · 21 km deep · 63 km away
- 2.02 km SW of West Richland, Washington · 15426 days ago · 7 km deep · 47 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10176068. Read Tue, Sep 22, 2026, 8:45 PM UTC.