Earthquake near Evanston, WY

USGS: 14 km SW of Woodruff, Utah

90 km (56 mi) NE of Salt Lake City, UT · 58 km (36 mi) SE of Logan, UT

9:56 am MDT, Oct 7, 2017 · 2017-10-07 15:56 UTC · -2.4 km deep · released about 8.7 lb of TNT

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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: 9:56 am MDT on 7 October 2017 (2017-10-07 15:56 UTC)
Where: 32 km (20 mi) WNW of Evanston, WY · earthquakes near Evanston
Magnitude: M 1.6 (md)
Depth: -2.4 km below the surface
Felt: no reports yet
Nearest: Rich County, 23 km N
Status: Reviewed by a seismologist

USGS · last changed by USGS 3237 days ago · we first saw it 3237 days ago

A magnitude 1.6 earthquake was recorded 32 km (20 mi) WNW of Evanston, WY, at 9:56 am MDT on 7 October 2017 (15:56 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 8.7 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.

Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
Around the size people start to feel M 3.0 110× the energy of this one
This earthquake M 1.6 about 8.7 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 lists one earthquake of M5 or more within 50 km:

5.5 26 km E of Avon, Utah · 20 km WNW of this epicentre Apr 7, 1934

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 41.4233, -111.2823. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Rich County, UT	23 km (14 mi)	N	earthquakes near Rich County
Morgan County, UT	44 km (28 mi)	SW	earthquakes near Morgan County
Cache County, UT	52 km (32 mi)	NW	earthquakes near Cache County
Weber County, UT	52 km (33 mi)	WSW	earthquakes near Weber County
Uinta County, WY	62 km (39 mi)	ESE	earthquakes near Uinta County
Summit County, UT	67 km (41 mi)	SSE	earthquakes near Summit County

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

Aftershocks so far

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

1.6 9 km ENE of Huntsville, Utah 04:06 UTC
1.6 8 km E of Avon, Utah 14:34 UTC
1.5 13 km ESE of Millville, Utah 03:38 UTC
1.6 9 km S of Avon, Utah 10:00 UTC
2.0 23 km SSW of Evanston, Wyoming 18:19 UTC
2.5 12 km E of Providence, Utah 01:36 UTC
2.4 21 km ENE of Echo, Utah 17:43 UTC
1.7 7 km E of Avon, Utah 12:29 UTC
1.7 6 km E of Avon, Utah 12:29 UTC
1.8 13 km E of Millville, Utah 16:42 UTC
1.7 17 km E of Providence, Utah 05:40 UTC
1.5 8 km ENE of Paradise, Utah 22:43 UTC
2.2 3 km E of Enterprise, Utah 14:05 UTC
1.6 21 km N of Henefer, Utah 02:28 UTC
2.2 8 km NE of Huntsville, Utah 07:39 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 02:09 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.