QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

6 km NNW of Summerville, Oregon

· 3.8 km deep · released about 380 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 27 kmUmatilla County 55 kmWallowa County 66 kmColumbia County 84 kmWalla Walla County 87 kmAsotin County 95 kmBaker County 97 kmGarfield County 106 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 2.7 (md)
Depth
3.8 km below the surface
Felt
no reports yet
Nearest
Union County, 27 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 380 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 40,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 29,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 380 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 45.5417, -118.0318. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, OR 27 km (16 mi) N of here earthquakes near Union County
Umatilla County, OR 55 km (34 mi) E of here earthquakes near Umatilla County
Wallowa County, OR 66 km (41 mi) W of here earthquakes near Wallowa County
Columbia County, WA 84 km (52 mi) S of here earthquakes near Columbia County
Walla Walla County, WA 87 km (54 mi) SSE of here earthquakes near Walla Walla County
Asotin County, WA 95 km (59 mi) SW 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. 1.5 3 km SSE of Wallowa, Oregon
  2. 2.1 5 km S of Milton-Freewater, Oregon
  3. 1.6 11 km E of Milton-Freewater, Oregon
  4. 1.7 11 km E of Milton-Freewater, Oregon
  5. 2.0 4 km ESE of Milton-Freewater, Oregon
  6. 1.5 22 km NNE of Elgin, Oregon
  7. 1.6 19 km SE of Walla Walla East, Washington
  8. 1.6 13 km SW of Lostine, Oregon
  9. 1.6 6 km WSW of La Grande, Oregon
  10. 1.8 10 km SE of La Grande, Oregon
  11. 1.8 5 km SSE of Milton-Freewater, Oregon
  12. 2.1 19 km SSW of La Grande, 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.