QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km E of Hubbard, Oregon

· 20 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 34 kmClackamas County 43 kmYamhill County 45 kmMultnomah County 48 kmWashington County 50 kmPolk County 60 kmClark County 69 kmLinn County 79 kmTillamook County 85 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
20 km below the surface
Felt
no reports yet
Nearest
Marion County, 34 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 837 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 45.1805, -122.7478. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 34 km (21 mi) NNW of here earthquakes near Marion County
Clackamas County, OR 43 km (27 mi) W of here earthquakes near Clackamas County
Yamhill County, OR 45 km (28 mi) E of here earthquakes near Yamhill County
Multnomah County, OR 48 km (30 mi) SSW of here earthquakes near Multnomah County
Washington County, OR 50 km (31 mi) SSE of here earthquakes near Washington County
Polk County, OR 60 km (37 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

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

  1. 2.1 4 km NE of Lafayette, Oregon
  2. 1.8 7 km SSE of Molalla, Oregon
  3. 1.7 2 km E of Amity, Oregon
  4. 3.2 5 km SE of Amity, Oregon
  5. 1.6 6 km S of Dayton, Oregon
  6. 1.6 6 km ESE of Molalla, Oregon
  7. 1.9 4 km NE of Lafayette, Oregon
  8. 1.6 4 km SSW of Scotts Mills, Oregon
  9. 1.8 6 km ESE of Molalla, Oregon
  10. 1.8 3 km W of Mehama, Oregon
  11. 2.0 3 km WSW of Dundee, Oregon
  12. 1.5 5 km E of Beavercreek, Oregon
  13. 2.1 7 km ESE of Molalla, Oregon
  14. 1.5 4 km SSW of Scotts Mills, Oregon
  15. 1.5 1 km SSE of Hubbard, 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.