QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Earthquake near Eugene, OR

USGS: 12 km NW of Westfir, Oregon

48 km (30 mi) ESE of Eugene, OR · 39 km (24 mi) SE of Springfield, OR

8:11 pm PDT, Sep 9, 2017 · · 3.8 km deep · released about 16 lb of TNT

Every earthquake near Eugene Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lane County 26 kmLinn County 73 kmDouglas County 76 kmBenton County 98 kmDeschutes County 111 kmMarion County 118 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
8:11 pm PDT on 9 September 2017 ()
Where
46 km (28 mi) ESE of Eugene, OR · earthquakes near Eugene
Magnitude
M 1.8 (ml)
Depth
3.8 km below the surface
Felt
no reports yet
Nearest
Lane County, 26 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3310 days ago

A magnitude 1.8 earthquake was recorded 46 km (28 mi) ESE of Eugene, OR, at 8:11 pm PDT on 9 September 2017 (03:11 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Oakridge, Lowell, Culp Creek.

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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 43.8362, -122.6007. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lane County, OR 26 km (16 mi) WNW earthquakes near Lane County
Linn County, OR 73 km (45 mi) N earthquakes near Linn County
Douglas County, OR 76 km (47 mi) SW earthquakes near Douglas County
Benton County, OR 98 km (61 mi) NW earthquakes near Benton County
Deschutes County, OR 111 km (69 mi) E earthquakes near Deschutes County
Marion County, OR 118 km (74 mi) N earthquakes near Marion 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 22 km N of Unity, Oregon
  2. 1.7 29 km SE of Cascadia, Oregon
  3. 1.7 13 km S of Culp Creek, Oregon
  4. 1.5 7 km SSW of Cottage Grove, Oregon
  5. 1.8 12 km SSW of Holley, Oregon
  6. 1.8 18 km ENE of Unity, Oregon
  7. 2.0 19 km ENE of Unity, Oregon
  8. 1.6 Oregon
  9. 1.7 16 km SSE of Cascadia, Oregon
  10. 1.5 15 km ENE of Springfield, Oregon
  11. 1.7 3 km SSE of Springfield, Oregon
  12. 1.5 29 km ENE of Glide, Oregon
  13. 1.6 22 km N of Unity, Oregon
  14. 1.5 8 km SSW of Cottage Grove, Oregon
  15. 1.6 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.