QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

11 km WNW of Knowles, Oklahoma

· 1.8 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Beaver County 26 kmMeade County 36 kmClark County 55 kmSeward County 57 kmHarper County 59 kmLipscomb County 72 kmOchiltree County 85 kmHaskell County 86 kmGray County 92 km
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
Magnitude
M 1.5 (ml)
Depth
1.8 km below the surface
Felt
no reports yet
Nearest
Beaver County, 26 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 317 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 5.4 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.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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

Epicentre 36.9278, -100.3032. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Beaver County, OK 26 km (16 mi) NE of here earthquakes near Beaver County
Meade County, KS 36 km (22 mi) S of here earthquakes near Meade County
Clark County, KS 55 km (34 mi) SW of here earthquakes near Clark County
Seward County, KS 57 km (35 mi) ESE of here earthquakes near Seward County
Harper County, OK 59 km (36 mi) WNW of here earthquakes near Harper County
Lipscomb County, TX 72 km (45 mi) N of here earthquakes near Lipscomb County

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

Aftershocks so far

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

  1. 2.0 12 km WNW of Knowles, Oklahoma
  2. 2.4 12 km NW of Knowles, Oklahoma
  3. 2.7 13 km WNW of Knowles, Oklahoma

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

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.