QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

5 km E of Crabtree, Oregon

· -0.6 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Linn County 28 kmMarion County 36 kmBenton County 50 kmPolk County 54 kmClackamas County 77 kmLane County 78 kmYamhill County 79 kmLincoln County 86 kmWashington County 105 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
-0.6 km below the surface
Felt
no reports yet
Nearest
Linn County, 28 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2161 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 44.6273, -122.8283. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Linn County, OR 28 km (17 mi) NW of here earthquakes near Linn County
Marion County, OR 36 km (23 mi) SSW of here earthquakes near Marion County
Benton County, OR 50 km (31 mi) ENE of here earthquakes near Benton County
Polk County, OR 54 km (34 mi) SE of here earthquakes near Polk County
Clackamas County, OR 77 km (48 mi) SW of here earthquakes near Clackamas County
Lane County, OR 78 km (48 mi) N of here earthquakes near Lane County

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

Aftershocks so far

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

  1. 1.7 Oregon
  2. 2.1 Oregon
  3. 2.0 3 km ENE of Millersburg, Oregon
  4. 1.6 5 km SSW of Scotts Mills, Oregon
  5. 1.6 5 km N of Waterloo, Oregon
  6. 1.7 2 km NW of Sweet Home, Oregon
  7. 1.6 4 km E of Lebanon, Oregon
  8. 1.8 4 km WNW of Mehama, Oregon
  9. 1.8 2 km W of Mehama, Oregon
  10. 1.8 3 km W of Mehama, Oregon
  11. 2.0 3 km W of Mehama, Oregon
  12. 1.9 6 km ENE of Lebanon, Oregon
  13. 1.7 4 km ESE of Silverton, Oregon
  14. 1.8 9 km WSW of Cascadia, Oregon
  15. 1.6 2 km S of Waterloo, 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.