QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

17 km ENE of Roosevelt, Washington

· -0.6 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gilliam County 51 kmMorrow County 52 kmKlickitat County 61 kmBenton County 61 kmSherman County 69 kmYakima County 93 kmUmatilla County 101 kmWasco County 115 kmWheeler County 118 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.8 (ml)
Depth
-0.6 km below the surface
Felt
no reports yet
Nearest
Gilliam County, 51 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 701 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 45.7960, -120.0013. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gilliam County, OR 51 km (31 mi) NNE of here earthquakes near Gilliam County
Morrow County, OR 52 km (32 mi) NW of here earthquakes near Morrow County
Klickitat County, WA 61 km (38 mi) E of here earthquakes near Klickitat County
Benton County, WA 61 km (38 mi) SW of here earthquakes near Benton County
Sherman County, OR 69 km (43 mi) NE of here earthquakes near Sherman County
Yakima County, WA 93 km (58 mi) SE of here earthquakes near Yakima County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

12 earthquakes have been recorded within 50 km since this one.

  1. 2.1 12 km SSE of Bickleton, Washington
  2. 1.5 12 km ENE of Lexington, Oregon
  3. 1.9 7 km SW of Arlington, Oregon
  4. 1.8 3 km E of Lexington, Oregon
  5. 1.5 4 km SSW of Arlington, Oregon
  6. 1.7 8 km N of Roosevelt, Washington
  7. 1.5 17 km NNE of Roosevelt, Washington
  8. 1.5 13 km NNE of Roosevelt, Washington
  9. 1.9 16 km ENE of Arlington, Oregon
  10. 2.0 8 km SSE of Bickleton, Washington
  11. 2.0 2 km SSE of Arlington, Oregon
  12. 1.6 10 km ENE of Lexington, Oregon

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.