Earthquake near Eugene, OR

USGS: 22 km ENE of Unity, Oregon

48 km (30 mi) E of Eugene, OR · 37 km (23 mi) E of Springfield, OR

1:21 am PDT, Aug 11, 2017 · 2017-08-11 08:21 UTC · 4.6 km deep · released about 5.6 lb of TNT

Every earthquake near Eugene Felt it? Tell USGS Check my area

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: 1:21 am PDT on 11 August 2017 (2017-08-11 08:21 UTC)
Where: 46 km (28 mi) E of Eugene, OR · earthquakes near Eugene
Magnitude: M 1.5 (ml)
Depth: 4.6 km below the surface
Felt: no reports yet
Nearest: Lane County, 33 km WSW
Status: Reviewed by a seismologist

USGS · last changed by USGS 3340 days ago · we first saw it 3340 days ago

A magnitude 1.5 earthquake was recorded 46 km (28 mi) E of Eugene, OR, at 1:21 am PDT on 11 August 2017 (08:21 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Lowell.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
Around the size people start to feel M 3.0 170× the energy of this one
This earthquake M 1.5 about 5.6 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

Map loads when it scrolls into view

Epicentre 44.0400, -122.5132. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Lane County, OR	33 km (21 mi)	WSW	earthquakes near Lane County
Linn County, OR	50 km (31 mi)	N	earthquakes near Linn County
Benton County, OR	88 km (55 mi)	NW	earthquakes near Benton County
Marion County, OR	96 km (60 mi)	N	earthquakes near Marion County
Douglas County, OR	98 km (61 mi)	SSW	earthquakes near Douglas County
Deschutes County, OR	104 km (65 mi)	E	earthquakes near Deschutes County

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

Aftershocks so far

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

1.7 29 km SE of Cascadia, Oregon 01:22 UTC
1.7 9 km SSW of Holley, Oregon 11:34 UTC
1.8 12 km SSW of Holley, Oregon 12:22 UTC
1.8 18 km ENE of Unity, Oregon 10:30 UTC
2.0 19 km ENE of Unity, Oregon 20:16 UTC
2.0 5 km NNE of Sweet Home, Oregon 20:33 UTC
1.6 Oregon 16:29 UTC
1.7 16 km SSE of Cascadia, Oregon 17:56 UTC
1.5 15 km ENE of Springfield, Oregon 23:39 UTC
1.7 3 km SSE of Springfield, Oregon 18:49 UTC
1.7 2 km NW of Sweet Home, Oregon 20:47 UTC
1.6 22 km N of Unity, Oregon 21:27 UTC
1.8 9 km WSW of Cascadia, Oregon 20:26 UTC
1.6 Oregon 17:42 UTC
1.8 1 km SSE of Springfield, Oregon 20:34 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:03 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.