QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

18 km SW of May, Oklahoma

· 26 km deep · released about 27 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ellis County 34 kmHarper County 40 kmLipscomb County 41 kmWoodward County 57 kmBeaver County 59 kmClark County 82 kmHemphill County 83 kmOchiltree County 85 kmRoger Mills County 89 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 2.0 (ml)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Ellis County, 34 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 419 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 27 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 560,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 390,000× the energy of this one
  3. Around the size people start to feel M 3.0 35× the energy of this one
  4. This earthquake M 2.0 about 27 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 36.5002, -99.9023. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ellis County, OK 34 km (21 mi) NNW of here earthquakes near Ellis County
Harper County, OK 40 km (25 mi) SSW of here earthquakes near Harper County
Lipscomb County, TX 41 km (26 mi) NE of here earthquakes near Lipscomb County
Woodward County, OK 57 km (35 mi) W of here earthquakes near Woodward County
Beaver County, OK 59 km (36 mi) ESE of here earthquakes near Beaver County
Clark County, KS 82 km (51 mi) S of here earthquakes near Clark County

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

Aftershocks so far

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

  1. 2.0 11 km NE of May, Oklahoma
  2. 1.6 10 km NE of May, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2021-05-25 — it released about 1,300 times the energy of this one.

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

On USGS

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