QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4 km WNW of Molalla, Oregon

· 24 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 29 kmClackamas County 34 kmMultnomah County 46 kmYamhill County 55 kmWashington County 57 kmPolk County 67 kmClark County 69 kmLinn County 75 kmHood River County 86 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
24 km below the surface
Felt
no reports yet
Nearest
Marion County, 29 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 10 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 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 45.1595, -122.6308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 29 km (18 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 46 km (29 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 57 km (35 mi) SE of here earthquakes near Washington County
Polk County, OR 67 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

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

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