9 km SW of Trinity, Alabama

2017-11-25 10:06 UTC · 3.4 km deep · released about 51 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: 2017-11-25 10:06 UTC
Magnitude: M 2.1 (md)
Depth: 3.4 km below the surface
Felt: 8 reports · strongest reported intensity III
Nearest: Lawrence County, 15 km WSW
Status: Reviewed by a seismologist

USGS · last changed by USGS 3147 days ago · we first saw it 3147 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
Magna, Utah 2020 M 5.7 210,000× the energy of this one
Around the size people start to feel M 3.0 19× the energy of this one
This earthquake M 2.1 about 51 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 34.5557, -87.1650. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Lawrence County, AL	15 km (9 mi)	ENE of here	earthquakes near Lawrence County
Morgan County, AL	31 km (19 mi)	WNW of here	earthquakes near Morgan County
Limestone County, AL	33 km (20 mi)	SSW of here	earthquakes near Limestone County
Winston County, AL	48 km (30 mi)	NNE of here	earthquakes near Winston County
Cullman County, AL	54 km (34 mi)	NNW of here	earthquakes near Cullman County
Lauderdale County, AL	59 km (37 mi)	SE of here	earthquakes near Lauderdale County

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

Aftershocks so far

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

2.5 12 km NNE of Trinity, Alabama 03:54 UTC
2.3 5 km NW of Addison, Alabama 02:59 UTC
2.4 6 km NW of Addison, Alabama 02:17 UTC
2.3 13 km N of Double Springs, Alabama 11:00 UTC
2.1 3 km NE of Courtland, Alabama 02:49 UTC
2.5 13 km S of Moulton, Alabama 20:24 UTC
2.3 8 km S of Killen, Alabama 03:03 UTC
2.1 8 km SW of Trinity, Alabama 18:57 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:07 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.