9 km E of Springdale, Utah

2019-09-02 03:59 UTC · 18 km deep · released about 800 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: 2019-09-02 03:59 UTC
Magnitude: M 3.0 (ml)
Depth: 18 km below the surface
Felt: 8 reports · strongest reported intensity III
Measured shaking: intensity III (ShakeMap)
Nearest: Washington County, 53 km W
Status: Reviewed by a seismologist

USGS · last changed by USGS 2508 days ago · we first saw it 2508 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

Northridge, California 1994 M 6.7 420,000× the energy of this one
Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
Magna, Utah 2020 M 5.7 13,000× the energy of this one
This earthquake M 3.0 about 800 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 37.1870, -112.8920. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Washington County, UT	53 km (33 mi)	E of here	earthquakes near Washington County
Iron County, UT	88 km (55 mi)	SSE of here	earthquakes near Iron County
Kane County, UT	96 km (60 mi)	W of here	earthquakes near Kane County

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

Aftershocks so far

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

1.6 14 km ENE of Springdale, Utah 00:41 UTC
1.7 14 km SSW of Kaibab, Arizona 11:44 UTC
2.4 9 km S of Cedar City, Utah 20:55 UTC
1.6 12 km SSE of Cedar City, Utah 03:11 UTC
2.0 Utah 09:03 UTC
1.8 12 km ESE of Springdale, Utah 05:42 UTC
2.0 12 km ESE of Springdale, Utah 00:45 UTC
1.6 9 km NE of Hildale, Utah 16:30 UTC
1.6 12 km ESE of Pine Valley, Utah 11:01 UTC
1.7 Arizona 19:10 UTC
1.6 3 km E of Hildale, Utah 11:38 UTC
1.7 2 km N of Cane Beds, Arizona 03:54 UTC
2.7 22 km SSW of Centennial Park, Arizona 08:55 UTC
1.8 1 km N of Cane Beds, Arizona 05:29 UTC
2.6 2 km NNW of Cane Beds, Arizona 14:32 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:38 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.