QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

11 km E of Milton-Freewater, Oregon

· 11 km deep · released about 6.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Walla Walla County 40 kmColumbia County 48 kmUmatilla County 54 kmUnion County 72 kmGarfield County 77 kmAsotin County 83 kmFranklin County 84 kmWallowa County 90 kmBenton County 104 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
11 km below the surface
Felt
no reports yet
Nearest
Walla Walla County, 40 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 417 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 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.6 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 45.9317, -118.2408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Walla Walla County, WA 40 km (25 mi) SSE of here earthquakes near Walla Walla County
Columbia County, WA 48 km (30 mi) SSW of here earthquakes near Columbia County
Umatilla County, OR 54 km (33 mi) NE of here earthquakes near Umatilla County
Union County, OR 72 km (45 mi) NNW of here earthquakes near Union County
Garfield County, WA 77 km (48 mi) SW of here earthquakes near Garfield County
Asotin County, WA 83 km (52 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

7 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. 1.9 9 km WNW of Touchet, 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.