8 km WNW of Sigurd, Utah

2019-08-07 00:46 UTC · 8.1 km deep · released about 6.4 lb of TNT

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: 2019-08-07 00:46 UTC
Magnitude: M 1.6 (ml)
Depth: 8.1 km below the surface
Felt: no reports yet
Nearest: Sevier County, 25 km ESE
Status: Reviewed by a seismologist

USGS · last changed by USGS 2608 days ago · we first saw it 2608 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 6.4 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 2,400,000× the energy of this one
Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
Around the size people start to feel M 3.0 150× the energy of this one
This earthquake M 1.6 about 6.4 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

Map loads when it scrolls into view

Epicentre 38.8608, -112.0642. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Sevier County, UT	25 km (16 mi)	WNW of here	earthquakes near Sevier County
Piute County, UT	59 km (36 mi)	N of here	earthquakes near Piute County
Sanpete County, UT	71 km (44 mi)	SW of here	earthquakes near Sanpete County
Millard County, UT	93 km (58 mi)	E of here	earthquakes near Millard County
Juab County, UT	114 km (71 mi)	SSE of here	earthquakes near Juab County
Wayne County, UT	115 km (71 mi)	NW of here	earthquakes near Wayne County

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

Aftershocks so far

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

2.8 4 km SSE of Joseph, Utah 06:48 UTC
1.6 10 km ESE of Glenwood, Utah 10:48 UTC
1.7 28 km N of Fremont, Utah 22:11 UTC
2.8 4 km NW of Aurora, Utah 01:52 UTC
2.5 8 km N of Richfield, Utah 01:24 UTC
1.6 2 km SW of Elsinore, Utah 23:21 UTC
1.7 18 km E of Holden, Utah 20:23 UTC
2.4 8 km SW of Kanosh, Utah 14:08 UTC
3.0 3 km NNW of Central Valley, Utah 20:56 UTC
1.6 8 km WNW of Marysvale, Utah 13:30 UTC
2.6 13 km SW of Kanosh, Utah 09:32 UTC
1.9 13 km SW of Kanosh, Utah 02:27 UTC
1.8 26 km ESE of Salina, Utah 06:20 UTC
1.6 31 km N of Fremont, Utah 04:41 UTC
1.9 28 km N of Fremont, Utah 09:05 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:24 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2019-02-20 — it released about 5,400 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.