QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

9 km SSW of Cottage Grove, Oregon

· -0.2 km deep · released about 8.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lane County 28 kmDouglas County 49 kmBenton County 89 kmLinn County 96 kmCoos County 99 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 1.6 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Lane County, 28 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 97 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 8.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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 43.7260, -123.1122. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lane County, OR 28 km (18 mi) SW of here earthquakes near Lane County
Douglas County, OR 49 km (30 mi) N of here earthquakes near Douglas County
Benton County, OR 89 km (55 mi) SSE of here earthquakes near Benton County
Linn County, OR 96 km (60 mi) SSW of here earthquakes near Linn County
Coos County, OR 99 km (62 mi) NE of here earthquakes near Coos County
Lincoln County, OR 120 km (75 mi) SSE of here earthquakes near Lincoln County

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

Aftershocks so far

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

  1. 1.1 4 km NNE of Roseburg North, Oregon
  2. 1.8 1 km ESE of Springfield, 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.