QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Earthquake near Mooreland, OK

No earthquake was likely felt in Mooreland in the 24 hours to 10:09 am CST (16:09 UTC). The last one was M 3.4, 139 km (87 mi) SE, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Mooreland

This page: a magnitude 2.9 earthquake was recorded 7 km (4 mi) north-northeast of Mooreland, OK, at 6:11 pm CST on 11 December 2017 (00:11 UTC), 6.5 km deep.

USGS: 7 km NNE of Mooreland, Oklahoma

6:11 pm CST, Dec 11, 2017 · · 6.5 km deep · released about 680 lb of TNT

Every earthquake near Mooreland Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Woodward County 12 kmWoods County 38 kmHarper County 54 kmEllis County 59 kmDewey County 60 kmMajor County 61 kmComanche County 76 kmAlfalfa County 81 kmBarber County 92 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
6:11 pm CST on 11 December 2017 ()
Where
7 km (4 mi) north-northeast of Mooreland, OK · earthquakes near Mooreland
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 2.9 (ml)
Depth
6.5 km below the surface
Felt
no reports yet
Nearest
Woodward County, 12 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3173 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 67 km (42 mi) from the epicentre. In Mooreland, 7 km away, the estimate is intensity III (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: Mooreland 7 km, intensity III · Woodward 20 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 2,000 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 36.5007, -99.1826. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Woodward County, OK 12 km (7 mi) SW earthquakes near Woodward County
Woods County, OK 38 km (24 mi) NE earthquakes near Woods County
Harper County, OK 54 km (34 mi) NW earthquakes near Harper County
Ellis County, OK 59 km (37 mi) WSW earthquakes near Ellis County
Dewey County, OK 60 km (37 mi) SSE earthquakes near Dewey County
Major County, OK 61 km (38 mi) ESE earthquakes near Major 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. 2.7 17 km SSE of Waynoka, Oklahoma
  2. 3.6 16 km SSE of Waynoka, Oklahoma
  3. 2.8 14 km SSE of Freedom, Oklahoma
  4. 2.9 14 km SSE of Freedom, Oklahoma
  5. 2.6 9 km SW of Waynoka, Oklahoma
  6. 2.8 23 km NE of Fort Supply, Oklahoma
  7. 2.1 6 km WSW of Chester, Oklahoma
  8. 2.8 15 km SSE of Waynoka, Oklahoma
  9. 2.6 15 km SSW of Freedom, Oklahoma
  10. 2.5 14 km WNW of Waynoka, Oklahoma
  11. 2.6 13 km WNW of Taloga, Oklahoma
  12. 2.4 12 km WNW of Taloga, Oklahoma
  13. 2.6 14 km WNW of Waynoka, Oklahoma
  14. 2.9 14 km SSE of Freedom, Oklahoma
  15. 2.5 16 km SE of Waynoka, 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.