QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

3 km W of Saint Paul, Oregon

· -0.2 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 24 kmWashington County 38 kmPolk County 46 kmMarion County 49 kmMultnomah County 60 kmTillamook County 64 kmClackamas County 65 kmClark County 75 kmColumbia County 81 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 1.8 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Yamhill County, 24 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1462 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 45.2147, -123.0190. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 24 km (15 mi) E of here earthquakes near Yamhill County
Washington County, OR 38 km (24 mi) S of here earthquakes near Washington County
Polk County, OR 46 km (29 mi) NE of here earthquakes near Polk County
Marion County, OR 49 km (31 mi) NW of here earthquakes near Marion County
Multnomah County, OR 60 km (37 mi) SW of here earthquakes near Multnomah County
Tillamook County, OR 64 km (40 mi) ESE of here earthquakes near Tillamook 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. 1.6 4 km WSW of Stafford, Oregon
  2. 1.8 9 km NW of Keizer, Oregon
  3. 1.6 4 km ESE of Sherwood, Oregon
  4. 1.5 5 km NE of Amity, Oregon
  5. 1.6 3 km SE of Canby, Oregon
  6. 1.5 8 km W of Yamhill, Oregon
  7. 1.6 3 km SE of Sherwood, Oregon
  8. 1.9 1 km WNW of Saint Paul, Oregon
  9. 1.6 3 km SE of Canby, Oregon
  10. 1.6 9 km NNE of Sheridan, Oregon
  11. 1.9 10 km NNE of Sheridan, Oregon
  12. 1.6 7 km SE of Fort Hill, Oregon
  13. 1.9 3 km WNW of Tigard, Oregon
  14. 1.9 15 km SE of Scotts Mills, Oregon
  15. 1.7 13 km N of Willamina, 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.