QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

17 km NNW of Halfway, Oregon

· 5.0 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Baker County 55 kmAdams County 58 kmWallowa County 63 kmWashington County 71 kmUnion County 72 kmPayette County 119 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
5.0 km below the surface
Felt
no reports yet
Nearest
Baker County, 55 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 247 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 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 45.0315, -117.1677. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Baker County, OR 55 km (34 mi) NE of here earthquakes near Baker County
Adams County, ID 58 km (36 mi) WNW of here earthquakes near Adams County
Wallowa County, OR 63 km (39 mi) S of here earthquakes near Wallowa County
Washington County, ID 71 km (44 mi) NNW of here earthquakes near Washington County
Union County, OR 72 km (45 mi) ESE of here earthquakes near Union County
Payette County, ID 119 km (74 mi) NNW of here earthquakes near Payette County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 2.3 9 km E of Halfway, 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.