QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

25 km SE of Holley, Oregon

· -0.8 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Linn County 35 kmLane County 37 kmBenton County 76 kmMarion County 80 kmPolk County 103 kmDouglas County 109 kmDeschutes County 112 kmClackamas County 114 kmLincoln County 117 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
-0.8 km below the surface
Felt
no reports yet
Nearest
Linn County, 35 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2097 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 44.1778, -122.5835. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Linn County, OR 35 km (22 mi) S of here earthquakes near Linn County
Lane County, OR 37 km (23 mi) NE of here earthquakes near Lane County
Benton County, OR 76 km (47 mi) ESE of here earthquakes near Benton County
Marion County, OR 80 km (50 mi) S of here earthquakes near Marion County
Polk County, OR 103 km (64 mi) SE of here earthquakes near Polk County
Douglas County, OR 109 km (68 mi) NNE of here earthquakes near Douglas County

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

Aftershocks so far

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

  1. 1.6 9 km SSE of Crawfordsville, Oregon
  2. 1.5 4 km SSE of Cascadia, Oregon
  3. 1.5 1 km NNE of Cascadia, Oregon
  4. 2.0 4 km N of Sweet Home, Oregon
  5. 1.8 5 km N of Waterloo, Oregon
  6. 1.6 4 km NW of Brownsville, Oregon
  7. 1.5 3 km S of Brownsville, Oregon
  8. 1.6 22 km N of Unity, Oregon
  9. 1.9 5 km ENE of Lebanon, Oregon
  10. 2.2 3 km NNW of Sweet Home, Oregon
  11. 1.6 2 km SSE of Sodaville, Oregon
  12. 1.7 29 km SE of Cascadia, Oregon
  13. 1.7 9 km SSW of Holley, Oregon
  14. 1.8 6 km ENE of Lebanon, Oregon
  15. 1.8 12 km SSW of Holley, 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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