7 km SSE of Byron, Oklahoma

2016-01-25 23:23 UTC · 4.9 km deep · released about 340 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: 2016-01-25 23:23 UTC
Magnitude: M 2.7 (ml)
Depth: 4.9 km below the surface
Felt: 2 reports · strongest reported intensity III
Nearest: Alfalfa County, 12 km SSW
Status: Reviewed by a seismologist

USGS · last changed by USGS 1517 days ago · we first saw it 1517 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
Magna, Utah 2020 M 5.7 32,000× the energy of this one
Around the size people start to feel M 3.0 2.8× the energy of this one
This earthquake M 2.7 about 340 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 36.8334, -98.2751. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Alfalfa County, OK	12 km (8 mi)	NNE of here	earthquakes near Alfalfa County
Harper County, KS	44 km (27 mi)	SSW of here	earthquakes near Harper County
Grant County, OK	44 km (27 mi)	W of here	earthquakes near Grant County
Woods County, OK	54 km (33 mi)	ENE of here	earthquakes near Woods County
Barber County, KS	57 km (35 mi)	SE of here	earthquakes near Barber County
Major County, OK	63 km (39 mi)	NNE of here	earthquakes near Major County

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

Aftershocks so far

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

1.7 5 km SSW of Bluff City, Kansas 15:13 UTC
2.7 8 km WNW of Jet, Oklahoma 01:39 UTC
1.6 6 km S of Anthony, Kansas 21:32 UTC
2.5 8 km ENE of Cherokee, Oklahoma 09:19 UTC
2.5 Oklahoma 02:25 UTC
2.8 10 km NW of Jefferson, Oklahoma 01:21 UTC
2.5 5 km ESE of Goltry, Oklahoma 00:06 UTC
2.7 3 km SW of Lambert, Oklahoma 21:08 UTC
3.4 4 km WNW of Medford, Oklahoma 20:39 UTC
1.9 5 km WSW of Bluff City, Kansas 18:58 UTC
1.6 6 km S of Anthony, Kansas 04:34 UTC
1.8 6 km S of Anthony, Kansas 00:29 UTC
1.8 6 km S of Anthony, Kansas 00:28 UTC
1.6 6 km S of Anthony, Kansas 22:53 UTC
1.6 Kansas 13:45 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 11:26 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.