Washington earthquakes

M1.5 earthquake 9 km ESE of Onalaska, Washington

A magnitude 1.5 earthquake struck 9 km ESE of Onalaska, Washington on Thu, Mar 20, 2008, 10:39 AM PDT (17:39 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M2.6 18 km ENE of Kalama, Washington. This one was a foreshock.

Onalaska 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2008-03-20 17:39:53 UTC
Depth
17.4 km (10.8 mi), shallow
Epicenter
46.532° N, 122.615° 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, 0.3 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
191°, poorly surrounded by stations
Stations used
11

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.51 km NW of Federal Way, Washington · 6766 days ago · 23 km deep · 92 km away
  2. 2.510 km NE of Ashford, Washington · 6760 days ago · 5 km deep · 62 km away
  3. 1.74 km ESE of Mossyrock, Washington · 6759 days ago · 20 km deep · 14 km away
  4. 1.710 km E of Kelso, Washington · 6757 days ago · 19 km deep · 43 km away
  5. 1.511 km E of Kelso, Washington · 6757 days ago · 18 km deep · 43 km away
  6. 1.52 km NW of Black Diamond, Washington · 6756 days ago · 14 km deep · 98 km away
  7. 1.74 km ESE of Mossyrock, Washington · 6746 days ago · 19 km deep · 14 km away
  8. 1.712 km SSE of Morton, Washington · 6740 days ago · 4 km deep · 31 km away
  9. 1.511 km NNE of Ashford, Washington · 6740 days ago · 6 km deep · 61 km away
  10. 1.51 km NNW of Browns Point, Washington · 6738 days ago · 20 km deep · 88 km away
  11. 1.70 km E of Salmon Creek, Washington · 6738 days ago · 19 km deep · 91 km away
  12. 2.618 km ENE of Kalama, Washington · 6736 days ago · 17 km deep · 53 km away
  13. 2.29 km E of Ashford, Washington · 6727 days ago · 1 km deep · 60 km away
  14. 2.10 km E of Auburn, Washington · 6720 days ago · 21 km deep · 91 km away
  15. 1.69 km NE of Kalama, Washington · 6717 days ago · -1 km deep · 53 km away
  16. 1.94 km W of Deer Island, Oregon · 6717 days ago · 26 km deep · 70 km away
  17. 2.021 km NNE of Amboy, Washington · 6716 days ago · 0 km deep · 53 km away
  18. 2.19 km E of Kelso, Washington · 6713 days ago · 19 km deep · 43 km away
  19. 1.61 km SE of Enumclaw, Washington · 6713 days ago · 20 km deep · 88 km away

Before

  1. 2.59 km W of Mossyrock, Washington · 6772 days ago · 19 km deep · 0 km away
  2. 2.03 km E of Dash Point, Washington · 6778 days ago · 30 km deep · 89 km away
  3. 1.79 km NE of North Plains, Oregon · 6781 days ago · 18 km deep · 100 km away
  4. 1.75 km ENE of Prescott, Oregon · 6782 days ago · 7 km deep · 54 km away
  5. 1.64 km ESE of Mossyrock, Washington · 6782 days ago · 18 km deep · 14 km away
  6. 1.737 km NNE of Amboy, Washington · 6787 days ago · 1 km deep · 49 km away
  7. 1.639 km NE of Amboy, Washington · 6788 days ago · 1 km deep · 51 km away
  8. 1.810 km NE of Packwood, Washington · 6788 days ago · -1 km deep · 81 km away
  9. 2.310 km SSW of Morton, Washington · 6788 days ago · 18 km deep · 24 km away
  10. 2.110 km SSW of Morton, Washington · 6788 days ago · 19 km deep · 24 km away
  11. 1.810 km SSW of Morton, Washington · 6788 days ago · 19 km deep · 24 km away
  12. 1.738 km NNE of Amboy, Washington · 6794 days ago · 0 km deep · 49 km away
  13. 1.618 km NNE of Ashford, Washington · 6800 days ago · 5 km deep · 65 km away
  14. 1.518 km SSE of Mossyrock, Washington · 6802 days ago · 21 km deep · 25 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10739348. Read Sun, Oct 4, 2026, 5:33 PM UTC.