QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

13 km N of Willamina, Oregon

· -0.3 km deep · released about 9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 15 kmPolk County 34 kmTillamook County 35 kmWashington County 51 kmLincoln County 70 kmBenton County 79 kmMarion County 80 kmColumbia County 89 kmMultnomah County 93 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 1.7 (ml)
Depth
-0.3 km below the surface
Felt
no reports yet
Nearest
Yamhill County, 15 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 912 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 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× 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 1.7 about 9 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 45.1983, -123.5010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 15 km (10 mi) WSW of here earthquakes near Yamhill County
Polk County, OR 34 km (21 mi) NNW of here earthquakes near Polk County
Tillamook County, OR 35 km (22 mi) SE of here earthquakes near Tillamook County
Washington County, OR 51 km (31 mi) SW of here earthquakes near Washington County
Lincoln County, OR 70 km (43 mi) NNE of here earthquakes near Lincoln County
Benton County, OR 79 km (49 mi) N of here earthquakes near Benton County

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

Aftershocks so far

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

  1. 2.1 4 km NE of Lafayette, Oregon
  2. 1.5 2 km NW of Sheridan, Oregon
  3. 1.6 24 km NNW of Sheridan, Oregon
  4. 1.8 8 km W of Falls City, Oregon
  5. 1.7 2 km E of Amity, Oregon
  6. 3.2 5 km SE of Amity, Oregon
  7. 1.6 6 km S of Dayton, Oregon
  8. 1.9 4 km NE of Lafayette, Oregon
  9. 1.6 5 km W of Dallas, Oregon
  10. 1.7 9 km WSW of Falls City, Oregon
  11. 2.0 3 km WSW of Dundee, Oregon
  12. 2.0 16 km W of Forest Grove, Oregon
  13. 1.7 4 km NNE of Lafayette, Oregon
  14. 1.6 21 km W of Forest Grove, Oregon
  15. 1.6 3 km S of Fort Hill, 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.