QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

4 km NE of Lafayette, Oregon

· -0.1 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 19 kmWashington County 32 kmPolk County 48 kmMarion County 56 kmTillamook County 58 kmMultnomah County 60 kmClackamas County 70 kmClark County 72 kmColumbia County 75 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
-0.1 km below the surface
Felt
no reports yet
Nearest
Yamhill County, 19 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1040 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 45.2697, -123.0700. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 19 km (12 mi) E of here earthquakes near Yamhill County
Washington County, OR 32 km (20 mi) S of here earthquakes near Washington County
Polk County, OR 48 km (30 mi) NNE of here earthquakes near Polk County
Marion County, OR 56 km (35 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 60 km (37 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

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

  1. 1.5 2 km WSW of Stafford, Oregon
  2. 2.0 5 km NW of North Portland, Oregon
  3. 2.1 1 km ESE of Banks, Oregon
  4. 1.7 9 km SSW of Saint Paul, Oregon
  5. 1.6 5 km W of Dallas, Oregon
  6. 1.6 16 km WNW of McMinnville, Oregon
  7. 1.7 4 km ENE of Lafayette, Oregon
  8. 2.0 4 km NNE of Lafayette, Oregon
  9. 1.7 11 km SE of Silverton, Oregon
  10. 1.8 6 km NNE of Falls City, Oregon
  11. 1.6 3 km E of Sherwood, Oregon
  12. 1.7 4 km ENE of Molalla, Oregon
  13. 1.8 3 km WNW of Mulino, Oregon
  14. 1.6 4 km NE of Lafayette, Oregon
  15. 1.6 17 km WNW 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.