QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km ENE of Molalla, Oregon

· 19 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clackamas County 25 kmMarion County 30 kmMultnomah County 43 kmWashington County 63 kmYamhill County 64 kmClark County 68 kmLinn County 75 kmPolk County 75 kmHood River County 77 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 2.1 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Clackamas County, 25 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 653 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 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 45.1633, -122.5137. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clackamas County, OR 25 km (16 mi) W of here earthquakes near Clackamas County
Marion County, OR 30 km (18 mi) N of here earthquakes near Marion County
Multnomah County, OR 43 km (27 mi) S of here earthquakes near Multnomah County
Washington County, OR 63 km (39 mi) SE of here earthquakes near Washington County
Yamhill County, OR 64 km (40 mi) E of here earthquakes near Yamhill County
Clark County, WA 68 km (42 mi) S of here earthquakes near Clark County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

41 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. 1.7 4 km NNW of Mount Hood Village, Oregon
  7. 1.5 5 km WNW of King City, Oregon
  8. 1.5 4 km WNW of Camas, Washington
  9. 2.0 2 km WNW of Dundee, Oregon
  10. 2.1 10 km NNE of Sandy, Oregon
  11. 1.7 8 km S of Molalla, Oregon
  12. 1.6 2 km WSW of Stafford, Oregon
  13. 1.8 4 km SSE of Stafford, Oregon
  14. 1.7 8 km S of Molalla, Oregon
  15. 1.8 7 km SSE of Molalla, 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.