QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

Oklahoma

Yes. A magnitude 1.9 earthquake was recorded in Oklahoma, 51 km (31 mi) N of Enid, OK, at 5:10 pm CDT on 17 May 2020 (22:10 UTC), 6.4 km deep.

51 km (31 mi) N of Enid, OK · 100 km (62 mi) SSW of Wichita, KS

· 6.4 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 8 kmHarper County 45 kmSumner County 49 kmAlfalfa County 51 kmGarfield County 53 kmKay County 57 kmNoble County 71 kmKingman County 84 kmBarber County 90 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 1.9 (ml)
Depth
6.4 km below the surface
Felt
no reports yet
Nearest
Grant County, 8 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2368 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 19 km (12 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.

Earthquakes near other towns within 30 km: Caldwell.

How big was it?

This earthquake released about 21 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 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× the energy of this one
  4. This earthquake M 1.9 about 21 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 4.4 on 2019-05-17 — about 5,800 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 36.8558, -97.7778. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Grant County, OK 8 km (5 mi) S earthquakes near Grant County
Harper County, KS 45 km (28 mi) NW earthquakes near Harper County
Sumner County, KS 49 km (31 mi) NNE earthquakes near Sumner County
Alfalfa County, OK 51 km (31 mi) WSW earthquakes near Alfalfa County
Garfield County, OK 53 km (33 mi) S earthquakes near Garfield County
Kay County, OK 57 km (35 mi) E earthquakes near Kay County

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

Aftershocks so far

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

  1. 1.8 9 km W of Lamont, Oklahoma
  2. 1.8 9 km W of Lamont, Oklahoma
  3. 1.6 10 km W of Lamont, Oklahoma
  4. 3.5 7 km N of Nardin, Oklahoma
  5. 1.6 Oklahoma
  6. 1.8 7 km E of Nescatunga, Oklahoma
  7. 1.6 10 km ESE of Jefferson, Oklahoma
  8. 2.4 7 km E of Nescatunga, Oklahoma
  9. 1.7 4 km WNW of Medford, Oklahoma
  10. 1.5 0 km ESE of Renfrow, Oklahoma
  11. 1.8 4 km SSW of Braman, Oklahoma
  12. 2.3 1 km SSW of Renfrow, Oklahoma
  13. 1.5 9 km WSW of Hunnewell, Kansas
  14. 1.8 10 km W of Lamont, Oklahoma
  15. 1.6 6 km NNE of Medford, 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.