QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

4 km WNW of Adair Village, Oregon

· -0.2 km deep · released about 7.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Benton County 25 kmPolk County 26 kmLincoln County 51 kmMarion County 59 kmLinn County 62 kmYamhill County 63 kmLane County 89 kmTillamook County 94 kmWashington County 98 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 1.6 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Benton County, 25 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1749 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 7.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.1 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 44.6842, -123.2647. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Benton County, OR 25 km (15 mi) NNE of here earthquakes near Benton County
Polk County, OR 26 km (16 mi) SSE of here earthquakes near Polk County
Lincoln County, OR 51 km (32 mi) E of here earthquakes near Lincoln County
Marion County, OR 59 km (37 mi) WSW of here earthquakes near Marion County
Linn County, OR 62 km (38 mi) WNW of here earthquakes near Linn County
Yamhill County, OR 63 km (39 mi) S of here earthquakes near Yamhill County

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

Aftershocks so far

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

  1. 1.6 3 km S of Fort Hill, Oregon
  2. 1.8 5 km N of Waterloo, Oregon
  3. 1.6 4 km NW of Brownsville, Oregon
  4. 1.8 6 km NNW of Philomath, Oregon
  5. 1.5 3 km S of Brownsville, Oregon
  6. 1.7 11 km ESE of Rose Lodge, Oregon
  7. 2.1 2 km WSW of Jefferson, Oregon
  8. 1.9 5 km ENE of Lebanon, Oregon
  9. 1.6 5 km W of Dallas, Oregon
  10. 1.6 7 km NNW of Philomath, Oregon
  11. 1.9 6 km SSW of Falls City, Oregon
  12. 1.6 6 km NNW of Philomath, Oregon
  13. 1.8 6 km NNE of Falls City, Oregon
  14. 1.7 13 km N of Summit, Oregon
  15. 2.2 3 km NNW of Sweet Home, 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.