QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

4 km WNW of Molalla, Oregon

· 24 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 30 kmClackamas County 34 kmMultnomah County 45 kmYamhill County 55 kmWashington County 56 kmPolk County 68 kmClark County 68 kmLinn County 76 kmHood River 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 2.7 (ml)
Depth
24 km below the surface
Felt
30 reports · strongest reported intensity III
Nearest
Marion County, 30 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1517 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 30 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 45.1702, -122.6257. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 30 km (19 mi) N of here earthquakes near Marion County
Clackamas County, OR 34 km (21 mi) W of here earthquakes near Clackamas County
Multnomah County, OR 45 km (28 mi) SSW of here earthquakes near Multnomah County
Yamhill County, OR 55 km (34 mi) E of here earthquakes near Yamhill County
Washington County, OR 56 km (35 mi) SE of here earthquakes near Washington County
Polk County, OR 68 km (42 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

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

  1. 1.8 9 km NW of Keizer, Oregon
  2. 1.6 4 km ESE of Sherwood, Oregon
  3. 1.5 5 km NE of Amity, Oregon
  4. 2.0 16 km ESE of Molalla, Oregon
  5. 1.6 3 km SE of Canby, Oregon
  6. 1.6 3 km SE of Sherwood, Oregon
  7. 1.9 1 km WNW of Saint Paul, Oregon
  8. 1.6 3 km SE of Canby, Oregon
  9. 1.9 3 km WNW of Tigard, Oregon
  10. 1.9 15 km SE of Scotts Mills, Oregon
  11. 1.7 3 km SSW of Scotts Mills, Oregon
  12. 1.9 5 km SSW of Aloha, Oregon
  13. 1.6 7 km ESE of Scotts Mills, Oregon
  14. 1.5 5 km W of Mehama, Oregon
  15. 1.6 3 km WNW of Lafayette, 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.