QuakeIndex

explosion · reviewed by a seismologist

M 2.2ml

5 km WSW of La Grande, Oregon

· -1.1 km deep · released about 54 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 12 kmUmatilla County 55 kmBaker County 77 kmWallowa County 82 kmWalla Walla County 108 kmColumbia County 111 kmGrant County 113 kmMorrow County 114 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 2.2 (ml)
Depth
-1.1 km below the surface
Felt
no reports yet
Nearest
Union County, 12 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 553 days ago

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

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 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 45.3132, -118.1578. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, OR 12 km (8 mi) W of here earthquakes near Union County
Umatilla County, OR 55 km (34 mi) SE of here earthquakes near Umatilla County
Baker County, OR 77 km (48 mi) NNW of here earthquakes near Baker County
Wallowa County, OR 82 km (51 mi) WSW of here earthquakes near Wallowa County
Walla Walla County, WA 108 km (67 mi) SSE of here earthquakes near Walla Walla County
Columbia County, WA 111 km (69 mi) S of here earthquakes near Columbia County

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

Aftershocks so far

20 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. 2.1 17 km WSW of Lostine, Oregon
  9. 1.5 17 km WSW of Lostine, Oregon
  10. 1.8 16 km WSW of Lostine, Oregon
  11. 1.8 16 km WSW of Lostine, Oregon
  12. 2.2 18 km WSW of Lostine, Oregon
  13. 1.5 18 km NE of Cove, Oregon
  14. 1.8 2 km NNW of Summerville, Oregon
  15. 2.1 13 km SW 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

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