QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Oklahoma

Yes. A magnitude 1.5 earthquake was recorded in Oklahoma, 28 km (17 mi) WSW of Enid, OK, at 7:22 pm CST on 4 December 2019 (01:22 UTC), 7.0 km deep.

28 km (17 mi) WSW of Enid, OK · 109 km (68 mi) NNW of Oklahoma City, OK

· 7.0 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 34 kmMajor County 35 kmKingfisher County 44 kmAlfalfa County 50 kmBlaine County 53 kmGrant County 63 kmLogan County 77 kmWoods County 79 kmNoble 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
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 1.5 (ml)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Garfield County, 34 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2533 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. 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: Waukomis, Okeene, Enid, Helena, Fairview.

How big was it?

This earthquake released about 5.7 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 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 4.2 on 2018-03-04 — about 10,000 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 36.3020, -98.1558. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Garfield County, OK 34 km (21 mi) ENE earthquakes near Garfield County
Major County, OK 35 km (22 mi) W earthquakes near Major County
Kingfisher County, OK 44 km (27 mi) SSE earthquakes near Kingfisher County
Alfalfa County, OK 50 km (31 mi) NNW earthquakes near Alfalfa County
Blaine County, OK 53 km (33 mi) SSW earthquakes near Blaine County
Grant County, OK 63 km (39 mi) NNE earthquakes near Grant County

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

Aftershocks so far

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

  1. 3.4 5 km NNE of Ames, Oklahoma
  2. 2.8 5 km NNE of Ames, Oklahoma
  3. 2.4 2 km SSE of Meno, Oklahoma
  4. 2.2 5 km N of Ames, Oklahoma
  5. 2.3 5 km NNE of Ames, Oklahoma
  6. 1.6 3 km ESE of Meno, Oklahoma
  7. 1.7 5 km N of Ames, Oklahoma
  8. 1.5 3 km NE of Meno, Oklahoma
  9. 2.2 3 km NE of Meno, Oklahoma
  10. 1.9 Oklahoma
  11. 2.6 3 km NE of Meno, Oklahoma
  12. 1.9 3 km SE of Meno, Oklahoma
  13. 3.1 4 km NE of Meno, Oklahoma
  14. 2.2 4 km W of Douglas, Oklahoma
  15. 2.4 4 km W of Douglas, 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.