Washington earthquakes

M1.9 earthquake 30 km E of Packwood, Washington

A magnitude 1.9 earthquake struck 30 km E of Packwood, Washington on Thu, Sep 24, 1987, 11:28 AM PDT (18:28 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M2.1 6 km SSE of Wilderness Rim, Washington. This one was a foreshock.

Tieton forecastMore in Washington

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.9 (md), micro
Local time
UTC
1987-09-24 18:28:34 UTC
Depth
-1.2 km (-0.7 mi), shallow
Epicenter
46.596° N, 121.273° W
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, 0.4 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
54°
Stations used
40

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 9 in the 30 days before it.

After

  1. 1.819 km WNW of Desert Aire, Washington · 14236 days ago · 2 km deep · 86 km away
  2. 1.62 km W of Black Diamond, Washington · 14233 days ago · 13 km deep · 98 km away
  3. 2.16 km SSE of Wilderness Rim, Washington · 14231 days ago · 1 km deep · 95 km away
  4. 1.96 km SSE of Wilderness Rim, Washington · 14229 days ago · 1 km deep · 95 km away
  5. 2.021 km SSE of Mossyrock, Washington · 14222 days ago · 7 km deep · 91 km away
  6. 2.025 km ENE of Ashford, Washington · 14219 days ago · -1 km deep · 46 km away
  7. 2.138 km NNE of Amboy, Washington · 14194 days ago · 4 km deep · 83 km away
  8. 1.522 km SSE of Packwood, Washington · 14190 days ago · -1 km deep · 33 km away

Before

  1. 1.513 km NE of Cliffdell, Washington · 14244 days ago · -1 km deep · 54 km away
  2. 1.821 km NNE of Goldendale, Washington · 14245 days ago · 12 km deep · 82 km away
  3. 2.616 km WSW of Alder, Washington · 14253 days ago · 18 km deep · 93 km away
  4. 1.622 km S of Morton, Washington · 14255 days ago · 12 km deep · 80 km away
  5. 2.822 km S of Morton, Washington · 14256 days ago · 11 km deep · 80 km away
  6. 1.722 km S of Morton, Washington · 14256 days ago · 11 km deep · 79 km away
  7. 1.822 km S of Morton, Washington · 14256 days ago · 12 km deep · 80 km away
  8. 2.123 km ENE of Ashford, Washington · 14263 days ago · 1 km deep · 47 km away
  9. 1.614 km NNW of Tampico, Washington · 14269 days ago · 5 km deep · 24 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10225818. Read Tue, Sep 22, 2026, 7:45 AM UTC.