QuakeIndex

explosion · reviewed by a seismologist

M 1.8ml

5 km SSE of Monroe, Oregon

· -0.4 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Benton County 28 kmLane County 48 kmLinn County 63 kmLincoln County 66 kmPolk County 71 kmMarion County 90 kmYamhill County 109 kmDouglas County 109 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
-0.4 km below the surface
Felt
no reports yet
Nearest
Benton County, 28 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 95 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 44.2668, -123.2728. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Benton County, OR 28 km (17 mi) SSE of here earthquakes near Benton County
Lane County, OR 48 km (30 mi) NW of here earthquakes near Lane County
Linn County, OR 63 km (39 mi) WSW of here earthquakes near Linn County
Lincoln County, OR 66 km (41 mi) SE of here earthquakes near Lincoln County
Polk County, OR 71 km (44 mi) S of here earthquakes near Polk County
Marion County, OR 90 km (56 mi) SW of here earthquakes near Marion County

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

Aftershocks so far

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

  1. 1.5 6 km SSE of Monroe, Oregon
  2. 1.8 1 km ESE of Springfield, Oregon
  3. 1.8 2 km ENE of Blodgett, 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.