QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

4 km NW of Adair Village, Oregon

· -0.1 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Polk County 25 kmBenton County 27 kmLincoln County 52 kmMarion County 58 kmYamhill County 61 kmLinn County 61 kmLane County 90 kmTillamook County 93 kmWashington County 96 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
-0.1 km below the surface
Felt
no reports yet
Nearest
Polk County, 25 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 283 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 8.4 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 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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 44.7005, -123.2533. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Polk County, OR 25 km (16 mi) SSE of here earthquakes near Polk County
Benton County, OR 27 km (17 mi) NNE of here earthquakes near Benton County
Lincoln County, OR 52 km (33 mi) E of here earthquakes near Lincoln County
Marion County, OR 58 km (36 mi) WSW of here earthquakes near Marion County
Yamhill County, OR 61 km (38 mi) S of here earthquakes near Yamhill County
Linn County, OR 61 km (38 mi) WNW of here earthquakes near Linn County

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

Aftershocks so far

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

  1. 1.8 2 km ENE of Blodgett, Oregon
  2. 1.8 5 km NW of Lacomb, Oregon
  3. 2.0 2 km SE of Amity, Oregon
  4. 1.9 3 km S of Fort Hill, Oregon
  5. 1.6 5 km NW of Lacomb, Oregon
  6. 1.8 5 km SSE of Monroe, Oregon
  7. 1.7 7 km ESE of Amity, Oregon
  8. 2.0 6 km W of Lacomb, Oregon
  9. 1.6 4 km NE of Falls City, Oregon
  10. 1.5 2 km NW of Sheridan, Oregon
  11. 1.8 8 km W of Falls City, Oregon
  12. 1.7 2 km E of Amity, Oregon
  13. 3.2 5 km SE of Amity, Oregon
  14. 1.6 6 km NNW of Philomath, Oregon
  15. 1.6 5 km W of Dallas, 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.