QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

10 km N of Irrigon, Oregon

· -0.3 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Benton County 27 kmMorrow County 63 kmUmatilla County 72 kmFranklin County 75 kmWalla Walla County 82 kmGilliam County 92 kmKlickitat County 102 kmYakima County 111 kmSherman 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 1.8 (ml)
Depth
-0.3 km below the surface
Felt
no reports yet
Nearest
Benton County, 27 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1307 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 45.9868, -119.4692. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Benton County, WA 27 km (17 mi) S of here earthquakes near Benton County
Morrow County, OR 63 km (39 mi) N of here earthquakes near Morrow County
Umatilla County, OR 72 km (45 mi) NW of here earthquakes near Umatilla County
Franklin County, WA 75 km (47 mi) SW of here earthquakes near Franklin County
Walla Walla County, WA 82 km (51 mi) WSW of here earthquakes near Walla Walla County
Gilliam County, OR 92 km (57 mi) NE of here earthquakes near Gilliam County

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

Aftershocks so far

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

  1. 1.8 11 km W of Highland, Washington
  2. 1.7 12 km ENE of Hermiston, Oregon
  3. 2.0 7 km WNW of Highland, Washington
  4. 1.8 3 km SSW of West Richland, Washington
  5. 1.8 11 km SSW of Tri-Cities, Washington
  6. 2.8 5 km ESE of Benton City, Washington
  7. 2.0 4 km ESE of Umatilla, Oregon
  8. 1.9 4 km ESE of Umatilla, Oregon
  9. 1.7 10 km SW of Kennewick, Washington
  10. 2.0 3 km E of Umatilla, Oregon
  11. 1.6 9 km WNW of Highland, Washington
  12. 1.7 1 km WNW of Highland, Washington
  13. 1.9 16 km ENE of Arlington, Oregon
  14. 2.0 2 km WSW of Burbank, Washington
  15. 1.8 4 km SSE of Kennewick, 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

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