QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Oklahoma

Yes. A magnitude 1.8 earthquake was recorded in Oklahoma, at 2:26 am CST on 2 February 2020 (08:26 UTC), 6.6 km deep.

· 6.6 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Woodward County 12 kmWoods County 41 kmDewey County 51 kmMajor County 55 kmEllis County 59 kmHarper County 63 kmAlfalfa County 80 kmComanche County 84 kmCuster County 88 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
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 1.8 (ml)
Depth
6.6 km below the surface
Felt
no reports yet
Nearest
Woodward County, 12 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2473 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 16 km (10 mi) from the epicentre. 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: Mooreland 6 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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

The largest earthquake within 50 km since 2016 was M 5.1 on 2016-02-13 — about 83,000 times the energy of this one.

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 36.4277, -99.1363. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Woodward County, OK 12 km (8 mi) W earthquakes near Woodward County
Woods County, OK 41 km (26 mi) NE earthquakes near Woods County
Dewey County, OK 51 km (32 mi) SSE earthquakes near Dewey County
Major County, OK 55 km (34 mi) ESE earthquakes near Major County
Ellis County, OK 59 km (37 mi) WSW earthquakes near Ellis County
Harper County, OK 63 km (39 mi) NW earthquakes near Harper County

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

Aftershocks so far

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

  1. 1.7 9 km NE of Quinlan, Oklahoma
  2. 1.9 9 km NNE of Quinlan, Oklahoma
  3. 2.8 9 km NNE of Quinlan, Oklahoma
  4. 1.9 9 km NNE of Quinlan, Oklahoma
  5. 1.8 9 km NNE of Quinlan, Oklahoma
  6. 1.6 17 km SE of Waynoka, Oklahoma
  7. 1.7 4 km NNW of Camargo, Oklahoma
  8. 2.2 17 km SE of Waynoka, Oklahoma
  9. 1.7 17 km SE of Waynoka, Oklahoma
  10. 1.7 17 km SSE of Waynoka, Oklahoma
  11. 1.5 9 km NNE of Quinlan, Oklahoma
  12. 1.6 10 km NNE of Quinlan, Oklahoma
  13. 1.9 9 km NNE of Quinlan, Oklahoma
  14. 2.3 17 km SE of Waynoka, Oklahoma
  15. 1.5 9 km NE of Quinlan, 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.