QuakeIndex

Earthquake · automatic estimate, may change

M 1.9ml

Earthquake near Weatherford, OK

No earthquake was likely felt in Weatherford in the 24 hours to 5:55 pm CST (23:55 UTC). The last one was M 3.4, 61 km (38 mi) E, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Weatherford

This page: a magnitude 1.9 earthquake was recorded 6 km (4 mi) north of Weatherford, OK, at 9:43 pm CDT on 21 April 2020 (02:43 UTC), 8.3 km deep. The magnitude and location are an automatic first estimate and may change.

USGS: 6 km N of Weatherford, Oklahoma

9:43 pm CDT, Apr 21, 2020 · · 8.3 km deep · released about 25 lb of TNT

10 km30 km60 km120 km N Custer County 26 kmWashita County 41 kmBlaine County 42 kmDewey County 51 kmCaddo County 55 kmCanadian County 67 kmKiowa County 77 kmKingfisher County 81 kmMajor County 83 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
9:43 pm CDT on 21 April 2020 ()
Where
6 km (4 mi) north of Weatherford, OK · earthquakes near Weatherford
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 1.9 (ml)
Depth
8.3 km below the surface
Felt
no reports yet
Nearest
Custer County, 26 km WNW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 2395 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 21 km (13 mi) from the epicentre. In Weatherford, 6 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Thomas 18 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 35.5833, -98.7165. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Custer County, OK 26 km (16 mi) WNW earthquakes near Custer County
Washita County, OK 41 km (26 mi) SW earthquakes near Washita County
Blaine County, OK 42 km (26 mi) NE earthquakes near Blaine County
Dewey County, OK 51 km (32 mi) NNW earthquakes near Dewey County
Caddo County, OK 55 km (34 mi) SSE earthquakes near Caddo County
Canadian County, OK 67 km (41 mi) E earthquakes near Canadian County

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

Aftershocks so far

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

  1. 2.1 9 km ESE of Thomas, Oklahoma
  2. 1.6 6 km ESE of Thomas, Oklahoma
  3. 2.1 8 km ESE of Thomas, Oklahoma
  4. 2.3 9 km ESE of Thomas, Oklahoma
  5. 1.6 8 km ESE of Thomas, Oklahoma
  6. 1.6 8 km ESE of Thomas, Oklahoma
  7. 1.7 8 km ESE of Thomas, Oklahoma
  8. 1.7 12 km NW of Watonga, Oklahoma
  9. 1.7 7 km WSW of Custer City, Oklahoma
  10. 1.8 7 km S of Putnam, Oklahoma
  11. 1.7 6 km N of Arapaho, Oklahoma
  12. 1.6 6 km WSW of Custer City, Oklahoma
  13. 1.8 7 km N of Arapaho, Oklahoma
  14. 1.6 6 km WSW of Custer City, Oklahoma
  15. 1.8 6 km W of Custer City, 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.