QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

6 km ESE of Molalla, Oregon

· -0.9 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 25 kmClackamas County 25 kmMultnomah County 48 kmYamhill County 65 kmWashington County 67 kmLinn County 70 kmClark County 73 kmPolk County 74 kmHood River County 80 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
-0.9 km below the surface
Felt
no reports yet
Nearest
Marion County, 25 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1283 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 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× 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 45.1172, -122.5103. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 25 km (15 mi) NNE of here earthquakes near Marion County
Clackamas County, OR 25 km (16 mi) W of here earthquakes near Clackamas County
Multnomah County, OR 48 km (30 mi) S of here earthquakes near Multnomah County
Yamhill County, OR 65 km (40 mi) ESE of here earthquakes near Yamhill County
Washington County, OR 67 km (42 mi) SE of here earthquakes near Washington County
Linn County, OR 70 km (43 mi) N of here earthquakes near Linn 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. 1.5 27 km NNE of Gates, Oregon
  2. 1.5 4 km SSW of Aloha, Oregon
  3. 2.0 4 km N of Newberg, Oregon
  4. 1.5 2 km WSW of Stafford, Oregon
  5. 1.7 14 km N of Mehama, Oregon
  6. 1.7 9 km SSW of Saint Paul, Oregon
  7. 1.8 10 km ESE of Molalla, Oregon
  8. 1.7 5 km W of Mehama, Oregon
  9. 1.7 11 km SE of Silverton, Oregon
  10. 1.6 3 km E of Sherwood, Oregon
  11. 1.9 7 km ESE of Molalla, Oregon
  12. 1.7 4 km ENE of Molalla, Oregon
  13. 1.8 5 km ENE of Molalla, Oregon
  14. 2.1 5 km ENE of Molalla, Oregon
  15. 2.0 2 km NE of Estacada, 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.