QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

19 km SE of Walla Walla East, Washington

· 7.3 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Columbia County 43 kmWalla Walla County 45 kmUmatilla County 61 kmUnion County 71 kmGarfield County 71 kmAsotin County 74 kmWallowa County 81 kmFranklin County 90 kmBenton 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 1.6 (ml)
Depth
7.3 km below the surface
Felt
no reports yet
Nearest
Columbia County, 43 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 651 days ago

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

How big was it?

This earthquake released about 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 45.9340, -118.1147. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Columbia County, WA 43 km (27 mi) SSW of here earthquakes near Columbia County
Walla Walla County, WA 45 km (28 mi) SE of here earthquakes near Walla Walla County
Umatilla County, OR 61 km (38 mi) NE of here earthquakes near Umatilla County
Union County, OR 71 km (44 mi) N of here earthquakes near Union County
Garfield County, WA 71 km (44 mi) SW of here earthquakes near Garfield County
Asotin County, WA 74 km (46 mi) WSW of here earthquakes near Asotin 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. 1.9 6 km WSW of Dayton, Washington
  2. 2.1 5 km S of Milton-Freewater, Oregon
  3. 1.6 5 km SW of Dayton, Washington
  4. 2.3 7 km N of Helix, Oregon
  5. 1.7 8 km N of Helix, Oregon
  6. 1.7 6 km WSW of Dayton, Washington
  7. 1.6 11 km E of Milton-Freewater, Oregon
  8. 1.7 11 km E of Milton-Freewater, Oregon
  9. 1.7 6 km WSW of Dayton, Washington
  10. 2.0 4 km ESE of Milton-Freewater, Oregon
  11. 1.5 22 km NNE of Elgin, Oregon
  12. 1.6 7 km SW of Dayton, 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.