QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5mb_lg

19 km SE of Waynoka, OK

Yes. A magnitude 2.5 earthquake was recorded 19 km SE of Waynoka, OK, at 11:58 am CDT on 1 August 2016 (16:58 UTC), 5.0 km deep.

· 5.0 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Major County 24 kmWoods County 32 kmWoodward County 48 kmAlfalfa County 48 kmDewey County 58 kmBlaine County 70 kmGarfield County 86 kmBarber County 86 kmHarper County 91 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
Magnitude
M 2.5 (mb_lg)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Major County, 24 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3676 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 46 km (29 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: Fairview 31 km, intensity II · Alva 40 km, intensity II · Mooreland 42 km, intensity II · Helena 43 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 in our catalogue was M 5.1 on 2016-02-13 — about 7,900 times the energy of this one.

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 36.4534, -98.7400. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Major County, OK 24 km (15 mi) SE earthquakes near Major County
Woods County, OK 32 km (20 mi) NNW earthquakes near Woods County
Woodward County, OK 48 km (30 mi) W earthquakes near Woodward County
Alfalfa County, OK 48 km (30 mi) NE earthquakes near Alfalfa County
Dewey County, OK 58 km (36 mi) SSW earthquakes near Dewey County
Blaine County, OK 70 km (43 mi) SSE earthquakes near Blaine County

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

Aftershocks so far

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

  1. 3.1 6 km E of Fairview, Oklahoma
  2. 2.5 10 km NE of Quinlan, Oklahoma
  3. 2.7 10 km SW of Waynoka, Oklahoma
  4. 2.6 10 km NE of Quinlan, Oklahoma
  5. 2.7 6 km E of Fairview, Oklahoma
  6. 2.8 4 km NE of Mooreland, Oklahoma
  7. 2.5 9 km W of Cleo Springs, Oklahoma
  8. 2.7 5 km NNW of Quinlan, Oklahoma
  9. 2.7 5 km SSW of Lambert, Oklahoma
  10. 2.9 10 km NE of Quinlan, Oklahoma
  11. 2.6 17 km SSE of Waynoka, Oklahoma
  12. 3.9 17 km SE of Waynoka, Oklahoma
  13. 3.0 9 km ESE of Alva, Oklahoma
  14. 2.8 22 km W of Cleo Springs, Oklahoma
  15. 2.4 16 km SSE 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.