QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

1 km NNW of Dayton, Oregon

· -0.2 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 18 kmWashington County 35 kmPolk County 45 kmMarion County 54 kmTillamook County 58 kmMultnomah County 62 kmClackamas County 70 kmClark County 76 kmColumbia County 79 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 1.8 (ml)
Depth
-0.2 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Yamhill County, 18 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 944 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 45.2347, -123.0813. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 18 km (11 mi) E of here earthquakes near Yamhill County
Washington County, OR 35 km (22 mi) S of here earthquakes near Washington County
Polk County, OR 45 km (28 mi) NNE of here earthquakes near Polk County
Marion County, OR 54 km (34 mi) NW of here earthquakes near Marion County
Tillamook County, OR 58 km (36 mi) ESE of here earthquakes near Tillamook County
Multnomah County, OR 62 km (39 mi) WSW of here earthquakes near Multnomah County

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

Aftershocks so far

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

  1. 1.6 4 km ENE of Lafayette, Oregon
  2. 1.5 4 km SSW of Aloha, Oregon
  3. 2.0 4 km N of Newberg, Oregon
  4. 1.7 4 km NE of Lafayette, Oregon
  5. 1.5 2 km WSW of Stafford, Oregon
  6. 2.1 1 km ESE of Banks, Oregon
  7. 1.7 9 km SSW of Saint Paul, Oregon
  8. 1.6 5 km W of Dallas, Oregon
  9. 1.6 16 km WNW of McMinnville, Oregon
  10. 1.7 4 km ENE of Lafayette, Oregon
  11. 2.0 4 km NNE of Lafayette, Oregon
  12. 1.7 11 km SE of Silverton, Oregon
  13. 1.8 6 km NNE of Falls City, Oregon
  14. 1.6 3 km E of Sherwood, Oregon
  15. 1.8 3 km WNW of Mulino, 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.