QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

4 km SSW of Scotts Mills, Oregon

· -0.5 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 15 kmClackamas County 43 kmYamhill County 56 kmPolk County 57 kmLinn County 59 kmMultnomah County 64 kmWashington County 69 kmBenton County 81 kmClark 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 1.7 (ml)
Depth
-0.5 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Marion County, 15 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2497 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 11 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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 45.0057, -122.6903. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 15 km (9 mi) NW of here earthquakes near Marion County
Clackamas County, OR 43 km (26 mi) WSW of here earthquakes near Clackamas County
Yamhill County, OR 56 km (35 mi) ESE of here earthquakes near Yamhill County
Polk County, OR 57 km (35 mi) ENE of here earthquakes near Polk County
Linn County, OR 59 km (36 mi) NNW of here earthquakes near Linn County
Multnomah County, OR 64 km (40 mi) SSW of here earthquakes near Multnomah 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. 1.6 14 km ESE of Scotts Mills, Oregon
  2. 1.7 8 km SE of Amity, Oregon
  3. 2.0 4 km WNW of Dundee, Oregon
  4. 1.6 1 km SSE of King City, Oregon
  5. 1.6 8 km ESE of Molalla, Oregon
  6. 1.7 4 km WNW of Molalla, Oregon
  7. 2.7 4 km WNW of Molalla, Oregon
  8. 2.2 1 km SW of Carlton, Oregon
  9. 1.7 3 km SSW of Scotts Mills, Oregon
  10. 1.7 8 km SE of Molalla, Oregon
  11. 2.0 6 km NE of Amity, Oregon
  12. 1.9 5 km E of Scotts Mills, Oregon
  13. 1.9 4 km SSW of Scotts Mills, Oregon
  14. 2.0 4 km W of Mehama, Oregon
  15. 1.6 6 km W of Lacomb, 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.