QuakeIndex

explosion · reviewed by a seismologist

M 2.1ml

2 km ENE of Arlington, Oregon

· -0.6 km deep · released about 44 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gilliam County 39 kmKlickitat County 50 kmSherman County 53 kmMorrow County 55 kmBenton County 76 kmYakima County 93 kmWasco County 99 kmWheeler County 110 kmUmatilla County 113 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 2.1 (ml)
Depth
-0.6 km below the surface
Felt
no reports yet
Nearest
Gilliam County, 39 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2367 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 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 45.7227, -120.1700. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gilliam County, OR 39 km (24 mi) NNE of here earthquakes near Gilliam County
Klickitat County, WA 50 km (31 mi) ESE of here earthquakes near Klickitat County
Sherman County, OR 53 km (33 mi) NE of here earthquakes near Sherman County
Morrow County, OR 55 km (34 mi) NW of here earthquakes near Morrow County
Benton County, WA 76 km (47 mi) SW of here earthquakes near Benton County
Yakima County, WA 93 km (58 mi) SSE of here earthquakes near Yakima County

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

Aftershocks so far

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

  1. 2.1 12 km SSE of Bickleton, Washington
  2. 1.9 7 km SW of Arlington, Oregon
  3. 1.8 8 km N of Condon, Oregon
  4. 1.5 4 km SSW of Arlington, Oregon
  5. 1.7 8 km N of Roosevelt, Washington
  6. 1.5 17 km NNE of Roosevelt, Washington
  7. 1.5 13 km NNE of Roosevelt, Washington
  8. 1.9 16 km ENE of Arlington, Oregon
  9. 2.0 8 km SSE of Bickleton, Washington
  10. 2.0 2 km SSE of Arlington, Oregon
  11. 1.7 8 km SE of Wasco, Oregon
  12. 1.8 17 km ENE of Roosevelt, Washington
  13. 1.8 6 km SW of Arlington, Oregon
  14. 2.2 19 km S of Arlington, Oregon
  15. 1.9 11 km S of Bickleton, Washington

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.