QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

1 km WNW of Saint Paul, Oregon

· -0.2 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 25 kmWashington County 38 kmPolk County 47 kmMarion County 48 kmMultnomah County 58 kmClackamas County 63 kmTillamook County 65 kmClark County 74 kmColumbia County 81 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 1.9 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Yamhill County, 25 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 872 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 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 45.2167, -122.9988. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 25 km (16 mi) E of here earthquakes near Yamhill County
Washington County, OR 38 km (24 mi) SSE of here earthquakes near Washington County
Polk County, OR 47 km (29 mi) NE of here earthquakes near Polk County
Marion County, OR 48 km (30 mi) NW of here earthquakes near Marion County
Multnomah County, OR 58 km (36 mi) SW of here earthquakes near Multnomah County
Clackamas County, OR 63 km (39 mi) W of here earthquakes near Clackamas 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. 2.0 16 km W of Forest Grove, Oregon
  2. 1.5 4 km SSW of Scotts Mills, Oregon
  3. 1.5 1 km SSE of Hubbard, Oregon
  4. 1.8 5 km N of West Haven, Oregon
  5. 1.8 8 km ESE of Scotts Mills, Oregon
  6. 1.7 4 km NNE of Lafayette, Oregon
  7. 1.6 6 km SSE of Molalla, Oregon
  8. 1.6 21 km W of Forest Grove, Oregon
  9. 1.6 4 km ENE of Lafayette, Oregon
  10. 1.5 4 km SSW of Aloha, Oregon
  11. 2.0 4 km N of Newberg, Oregon
  12. 1.7 4 km NE of Lafayette, Oregon
  13. 1.5 2 km WSW of Stafford, Oregon
  14. 1.7 14 km N of Mehama, Oregon
  15. 2.1 1 km ESE of Banks, 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.