QuakeIndex

explosion · reviewed by a seismologist

M 2.0ml

Washington

· -0.3 km deep · released about 27 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Columbia County 17 kmWalla Walla County 27 kmGarfield County 50 kmFranklin County 68 kmAsotin County 70 kmUmatilla County 86 kmWhitman County 86 kmAdams County 90 kmWallowa County 103 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 2.0 (ml)
Depth
-0.3 km below the surface
Felt
no reports yet
Nearest
Columbia County, 17 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2623 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 27 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 560,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 390,000× the energy of this one
  3. Around the size people start to feel M 3.0 35× the energy of this one
  4. This earthquake M 2.0 about 27 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 46.2435, -118.1270. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Columbia County, WA 17 km (11 mi) WSW of here earthquakes near Columbia County
Walla Walla County, WA 27 km (17 mi) E of here earthquakes near Walla Walla County
Garfield County, WA 50 km (31 mi) WSW of here earthquakes near Garfield County
Franklin County, WA 68 km (42 mi) ESE of here earthquakes near Franklin County
Asotin County, WA 70 km (43 mi) W of here earthquakes near Asotin County
Umatilla County, OR 86 km (54 mi) NNE of here earthquakes near Umatilla County

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

Aftershocks so far

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

  1. 1.9 6 km WSW of Dayton, Washington
  2. 1.7 15 km NW of Pomeroy, Washington
  3. 2.1 5 km S of Milton-Freewater, Oregon
  4. 1.6 5 km SW of Dayton, Washington
  5. 1.7 6 km WSW of Dayton, Washington
  6. 1.6 11 km E of Milton-Freewater, Oregon
  7. 1.7 11 km E of Milton-Freewater, Oregon
  8. 2.0 16 km WNW of Pomeroy, Washington
  9. 1.7 6 km WSW of Dayton, Washington
  10. 2.0 4 km ESE of Milton-Freewater, Oregon
  11. 1.6 7 km SW of Dayton, Washington
  12. 1.6 19 km SE of Walla Walla East, Washington
  13. 1.9 7 km WSW of Dayton, Washington
  14. 1.7 7 km ENE of Waitsburg, Washington
  15. 1.8 7 km ENE of Waitsburg, 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.