QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

13 km SW of La Grande, Oregon

· 7.5 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 17 kmUmatilla County 58 kmBaker County 71 kmWallowa County 89 kmGrant County 104 kmMorrow County 112 kmWalla Walla County 116 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
7.5 km below the surface
Felt
no reports yet
Nearest
Union County, 17 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2687 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 45.2305, -118.1948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, OR 17 km (11 mi) WSW of here earthquakes near Union County
Umatilla County, OR 58 km (36 mi) SE of here earthquakes near Umatilla County
Baker County, OR 71 km (44 mi) NW of here earthquakes near Baker County
Wallowa County, OR 89 km (55 mi) WSW of here earthquakes near Wallowa County
Grant County, OR 104 km (65 mi) NE of here earthquakes near Grant County
Morrow County, OR 112 km (70 mi) E of here earthquakes near Morrow County

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

Aftershocks so far

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

  1. 2.0 2 km NNW of North Powder, Oregon
  2. 1.6 6 km WSW of La Grande, Oregon
  3. 1.8 10 km SE of La Grande, Oregon
  4. 2.1 19 km SSW of La Grande, Oregon
  5. 1.6 6 km NNW of Haines, Oregon
  6. 2.7 6 km NNW of Summerville, Oregon
  7. 1.6 14 km NE of Cove, Oregon
  8. 1.5 18 km NE of Cove, Oregon
  9. 1.8 2 km NNW of Summerville, 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.