QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

4 km E of Prineville, Oregon

· -1.4 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Crook County 36 kmJefferson County 49 kmDeschutes County 56 kmWheeler County 77 kmWasco County 100 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
-1.4 km below the surface
Felt
no reports yet
Nearest
Crook County, 36 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2892 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 16 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 44.3048, -120.7820. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Crook County, OR 36 km (23 mi) WNW of here earthquakes near Crook County
Jefferson County, OR 49 km (31 mi) SE of here earthquakes near Jefferson County
Deschutes County, OR 56 km (35 mi) NE of here earthquakes near Deschutes County
Wheeler County, OR 77 km (48 mi) SW of here earthquakes near Wheeler County
Wasco County, OR 100 km (62 mi) SSE of here earthquakes near Wasco County
Clackamas County, OR 147 km (91 mi) SE of here earthquakes near Clackamas County

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

Aftershocks so far

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

  1. 1.8 13 km WNW of Prineville, Oregon
  2. 1.9 9 km SW of Prineville, Oregon
  3. 1.9 10 km E of Terrebonne, Oregon
  4. 1.7 12 km ENE of Terrebonne, Oregon
  5. 2.1 5 km SSW of Prineville, Oregon
  6. 1.9 6 km SE of Bend, Oregon
  7. 1.8 8 km ESE of Terrebonne, Oregon
  8. 1.6 35 km SSE of Prineville, Oregon
  9. 2.0 6 km SE of Bend, Oregon
  10. 2.0 11 km ENE of Terrebonne, Oregon
  11. 2.3 6 km SW of Prineville, Oregon
  12. 2.0 29 km SE of Pronghorn, Oregon
  13. 1.7 9 km ENE of Terrebonne, Oregon
  14. 1.9 7 km SE of Bend, Oregon
  15. 2.0 8 km W of Mitchell, 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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