QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

6 km NNW of Philomath, Oregon

· -0.3 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Benton County 11 kmPolk County 35 kmLincoln County 41 kmLinn County 70 kmYamhill County 74 kmMarion County 74 kmLane County 84 kmTillamook County 100 kmWashington County 110 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
-0.3 km below the surface
Felt
no reports yet
Nearest
Benton County, 11 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 423 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 44.5893, -123.4040. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Benton County, OR 11 km (7 mi) N of here earthquakes near Benton County
Polk County, OR 35 km (21 mi) S of here earthquakes near Polk County
Lincoln County, OR 41 km (25 mi) E of here earthquakes near Lincoln County
Linn County, OR 70 km (43 mi) W of here earthquakes near Linn County
Yamhill County, OR 74 km (46 mi) S of here earthquakes near Yamhill County
Marion County, OR 74 km (46 mi) WSW of here earthquakes near Marion County

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

Aftershocks so far

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

  1. 1.5 6 km SSE of Monroe, Oregon
  2. 1.8 2 km ENE of Blodgett, Oregon
  3. 1.8 5 km SSE of Monroe, Oregon
  4. 1.6 4 km NE of Falls City, Oregon
  5. 1.9 7 km SE of Toledo, Oregon
  6. 1.8 8 km W of Falls City, Oregon
  7. 1.6 6 km NNW of Philomath, Oregon
  8. 1.6 5 km W of Dallas, Oregon
  9. 1.7 9 km WSW of Falls City, Oregon
  10. 2.2 9 km E of Lincoln Beach, Oregon
  11. 1.7 10 km S of Alsea, Oregon
  12. 1.6 4 km NW of Brownsville, 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.