QuakeIndex

explosion · reviewed by a seismologist

M 1.5ml

15 km ENE of Springfield, Oregon

· -0.6 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lane County 18 kmLinn County 50 kmBenton County 65 kmDouglas County 93 kmMarion County 93 kmPolk County 101 kmLincoln County 106 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
-0.6 km below the surface
Felt
no reports yet
Nearest
Lane County, 18 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1151 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 5.6 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 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 44.0863, -122.8307. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lane County, OR 18 km (11 mi) NNE of here earthquakes near Lane County
Linn County, OR 50 km (31 mi) SSW of here earthquakes near Linn County
Benton County, OR 65 km (41 mi) SE of here earthquakes near Benton County
Douglas County, OR 93 km (58 mi) NNE of here earthquakes near Douglas County
Marion County, OR 93 km (58 mi) SSW of here earthquakes near Marion County
Polk County, OR 101 km (63 mi) SSE of here earthquakes near Polk County

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

Aftershocks so far

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

  1. 0.4 24 km ENE of Unity, Oregon
  2. 1.5 6 km SSE of Monroe, Oregon
  3. 1.8 1 km ESE of Springfield, Oregon
  4. 1.8 5 km SSE of Monroe, Oregon
  5. 1.6 9 km SSW of Cottage Grove, Oregon
  6. 1.7 14 km NE of Springfield, Oregon
  7. 1.6 9 km SSE of Crawfordsville, Oregon
  8. 1.5 4 km SSE of Cascadia, Oregon
  9. 1.5 1 km NNE of Cascadia, Oregon
  10. 2.0 4 km N of Sweet Home, Oregon
  11. 1.6 4 km NW of Brownsville, Oregon
  12. 1.5 3 km S of Brownsville, Oregon
  13. 1.6 22 km N of Unity, Oregon
  14. 2.2 3 km NNW of Sweet Home, Oregon
  15. 1.6 2 km SSE of Sodaville, 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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