QuakeIndex

explosion · reviewed by a seismologist

M 2.1ml

7 km W of Drain, Oregon

· 5.5 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Douglas County 45 kmLane County 51 kmCoos County 76 kmBenton County 94 kmLinn County 116 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 2.1 (ml)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Douglas County, 45 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2883 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 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 43.6495, -123.4068. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Douglas County, OR 45 km (28 mi) NNW of here earthquakes near Douglas County
Lane County, OR 51 km (32 mi) SW of here earthquakes near Lane County
Coos County, OR 76 km (47 mi) NE of here earthquakes near Coos County
Benton County, OR 94 km (58 mi) S of here earthquakes near Benton County
Linn County, OR 116 km (72 mi) SW of here earthquakes near Linn County
Lincoln County, OR 117 km (73 mi) SSE of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 1.7 21 km ESE of Reedsport, Oregon
  2. 1.7 22 km W of Elkton, Oregon
  3. 2.0 6 km NW of Roseburg North, Oregon
  4. 1.9 30 km ESE of Florence, Oregon
  5. 1.9 Oregon
  6. 1.9 6 km NW of Roseburg North, Oregon
  7. 1.9 Oregon
  8. 1.6 0 km NW of Roseburg North, Oregon
  9. 1.5 8 km SSW of Cottage Grove, Oregon
  10. 1.7 29 km ESE of Florence, Oregon
  11. 1.5 4 km NNE of Roseburg North, Oregon
  12. 1.5 31 km WNW of Melrose, Oregon
  13. 1.7 18 km SE of Reedsport, Oregon
  14. 1.6 9 km W of Melrose, Oregon
  15. 1.5 14 km ENE of Fair Oaks, 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.