QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

6 km SSE of Molalla, Oregon

· -0.5 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marion County 22 kmClackamas County 28 kmMultnomah County 51 kmYamhill County 63 kmWashington County 67 kmLinn County 67 kmPolk County 70 kmClark County 75 kmHood River County 84 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 1.6 (ml)
Depth
-0.5 km below the surface
Felt
no reports yet
Nearest
Marion County, 22 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 394 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 45.0952, -122.5457. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marion County, OR 22 km (14 mi) N of here earthquakes near Marion County
Clackamas County, OR 28 km (18 mi) WSW of here earthquakes near Clackamas County
Multnomah County, OR 51 km (32 mi) SSW of here earthquakes near Multnomah County
Yamhill County, OR 63 km (39 mi) ESE of here earthquakes near Yamhill County
Washington County, OR 67 km (41 mi) SE of here earthquakes near Washington County
Linn County, OR 67 km (42 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

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

  1. 1.2 13 km SE of Scotts Mills, Oregon
  2. 2.1 8 km ESE of Molalla, Oregon
  3. 1.6 5 km SSE of Molalla, Oregon
  4. 1.5 9 km ESE of Scotts Mills, Oregon
  5. 1.6 7 km ESE of Molalla, Oregon
  6. 1.5 5 km WNW of King City, Oregon
  7. 2.0 2 km WNW of Dundee, Oregon
  8. 1.7 8 km S of Molalla, Oregon
  9. 1.9 7 km S of Dayton, Oregon
  10. 1.6 2 km WSW of Stafford, Oregon
  11. 1.8 4 km SSE of Stafford, Oregon
  12. 1.7 8 km S of Molalla, Oregon
  13. 2.1 4 km NE of Lafayette, Oregon
  14. 1.8 7 km SSE of Molalla, Oregon
  15. 1.6 6 km S of Dayton, 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.