QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Washington-Oregon border region

· 11 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 13 kmClackamas County 37 kmLinn County 59 kmYamhill County 61 kmMultnomah County 61 kmPolk County 63 kmWashington County 70 kmClark County 84 kmBenton County 87 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
11 km below the surface
Felt
no reports yet
Nearest
Marion County, 13 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2218 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

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 45.0190, -122.6155. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 13 km (8 mi) NNW of here earthquakes near Marion County
Clackamas County, OR 37 km (23 mi) WSW of here earthquakes near Clackamas County
Linn County, OR 59 km (37 mi) N of here earthquakes near Linn County
Yamhill County, OR 61 km (38 mi) ESE of here earthquakes near Yamhill County
Multnomah County, OR 61 km (38 mi) SSW of here earthquakes near Multnomah County
Polk County, OR 63 km (39 mi) ENE of here earthquakes near Polk County

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

Aftershocks so far

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

  1. 1.8 2 km W of Mehama, Oregon
  2. 1.8 3 km W of Mehama, Oregon
  3. 1.7 8 km SE of Molalla, Oregon
  4. 2.0 3 km W of Mehama, Oregon
  5. 1.6 3 km ESE of Sherwood, Oregon
  6. 2.0 2 km WNW of Molalla, Oregon
  7. 1.7 4 km ESE of Silverton, Oregon
  8. 1.9 3 km NNE of Hubbard, Oregon
  9. 1.7 Washington-Oregon border region
  10. 1.7 5 km SSW of Saint Paul, Oregon
  11. 1.5 7 km ESE of Estacada, Oregon
  12. 1.7 8 km E of Molalla, Oregon
  13. 1.6 5 km E of Hubbard, Oregon
  14. 1.5 6 km SE of Molalla, Oregon
  15. 1.8 3 km W of Saint Paul, 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.