QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

4 km SSE of Scotts Mills, Oregon

· -0.3 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 13 kmClackamas County 40 kmLinn County 58 kmYamhill County 58 kmPolk County 60 kmMultnomah County 63 kmWashington County 70 kmBenton County 83 kmClark 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
-0.3 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 2650 days ago

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

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 12 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 45.0040, -122.6562. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 13 km (8 mi) NNW of here earthquakes near Marion County
Clackamas County, OR 40 km (25 mi) WSW of here earthquakes near Clackamas County
Linn County, OR 58 km (36 mi) N of here earthquakes near Linn County
Yamhill County, OR 58 km (36 mi) ESE of here earthquakes near Yamhill County
Polk County, OR 60 km (37 mi) ENE of here earthquakes near Polk County
Multnomah County, OR 63 km (39 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

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

  1. 1.7 3 km SSW of Scotts Mills, Oregon
  2. 1.7 8 km SE of Molalla, Oregon
  3. 2.0 6 km NE of Amity, Oregon
  4. 1.9 5 km E of Scotts Mills, Oregon
  5. 1.9 4 km SSW of Scotts Mills, Oregon
  6. 1.7 14 km E of Lacomb, Oregon
  7. 2.0 4 km W of Mehama, Oregon
  8. 1.6 6 km W of Lacomb, Oregon
  9. 1.7 5 km ESE of Scotts Mills, Oregon
  10. 1.9 5 km ESE of Silverton, Oregon
  11. 2.0 7 km ESE of Molalla, Oregon
  12. 1.8 3 km N of Wilsonville, Oregon
  13. 1.6 6 km SE of Molalla, Oregon
  14. 1.7 3 km SSW of Scotts Mills, Oregon
  15. 1.9 4 km ENE 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

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