QuakeIndex

explosion · reviewed by a seismologist

M 1.5ml

4 km SSE of Umatilla, Oregon

· -0.3 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Benton County 41 kmMorrow County 56 kmUmatilla County 56 kmWalla Walla County 77 kmFranklin County 79 kmGilliam County 93 kmKlickitat County 113 kmColumbia County 117 kmSherman 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 1.5 (ml)
Depth
-0.3 km below the surface
Felt
no reports yet
Nearest
Benton County, 41 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1498 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 45.8838, -119.3163. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Benton County, WA 41 km (26 mi) SSE of here earthquakes near Benton County
Morrow County, OR 56 km (35 mi) NNE of here earthquakes near Morrow County
Umatilla County, OR 56 km (35 mi) NW of here earthquakes near Umatilla County
Walla Walla County, WA 77 km (48 mi) WSW of here earthquakes near Walla Walla County
Franklin County, WA 79 km (49 mi) SSW of here earthquakes near Franklin County
Gilliam County, OR 93 km (58 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

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

  1. 2.0 4 km ESE of Umatilla, Oregon
  2. 1.9 4 km ESE of Umatilla, Oregon
  3. 1.7 10 km SW of Kennewick, Washington
  4. 1.9 9 km WNW of Touchet, Washington
  5. 1.8 4 km NNW of Pendleton, Oregon
  6. 2.0 3 km E of Umatilla, Oregon
  7. 1.6 9 km WNW of Highland, Washington
  8. 1.7 1 km WNW of Highland, Washington
  9. 2.0 2 km WSW of Burbank, Washington
  10. 1.8 4 km SSE of Kennewick, Washington
  11. 2.3 4 km SSW of West Richland, Washington
  12. 1.6 4 km S of Echo, Oregon
  13. 1.7 10 km SSW of Tri-Cities, Washington
  14. 2.0 4 km SE of Umatilla, Oregon
  15. 1.6 10 km ENE of Prosser, 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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