QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Anthony, KS

No earthquake was likely felt in Anthony in the 24 hours to 8:42 am CST (14:42 UTC). The last one was M 3.4, 172 km (107 mi) S, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Anthony

This page: a magnitude 1.5 earthquake was recorded 19 km (12 mi) south of Anthony, KS, at 2:40 am CDT on 9 July 2022 (07:40 UTC), 6.0 km deep.

USGS: 1 km SE of Manchester, Oklahoma

99 km (61 mi) SW of Wichita, KS

2:40 am CDT, Jul 9, 2022 · · 6.0 km deep · released about 5.9 lb of TNT

10 km30 km60 km120 km N Harper County 23 kmGrant County 30 kmAlfalfa County 39 kmSumner County 55 kmKingman County 64 kmBarber County 64 kmGarfield County 71 kmWoods County 80 kmKay County 81 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
2:40 am CDT on 9 July 2022 ()
Where
19 km (12 mi) south of Anthony, KS · earthquakes near Anthony
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 1.5 (ml)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Harper County, 23 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1584 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. In Anthony, 19 km away, the estimate is intensity II (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.

How big was it?

This earthquake released about 5.9 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 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 4.5 on 2022-01-31 — about 29,000 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 36.9843, -98.0260. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Harper County, KS 23 km (14 mi) N earthquakes near Harper County
Grant County, OK 30 km (19 mi) SE earthquakes near Grant County
Alfalfa County, OK 39 km (24 mi) SW earthquakes near Alfalfa County
Sumner County, KS 55 km (34 mi) ENE earthquakes near Sumner County
Kingman County, KS 64 km (40 mi) N earthquakes near Kingman County
Barber County, KS 64 km (40 mi) WNW earthquakes near Barber County

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

Aftershocks so far

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

  1. 1.7 3 km WNW of Wakita, Oklahoma
  2. 2.1 3 km ENE of Medford, Oklahoma
  3. 2.1 10 km W of Lamont, Oklahoma
  4. 2.6 3 km ENE of Freeport, Kansas
  5. 2.3 8 km ESE of Medford, Oklahoma
  6. 2.2 Oklahoma
  7. 2.1 6 km NW of Medford, Oklahoma
  8. 2.3 Kansas
  9. 2.4 Kansas
  10. 2.4 3 km W of Danville, Kansas
  11. 2.3 6 km SW of Danville, Kansas
  12. 3.2 8 km SW of Danville, Kansas
  13. 1.8 10 km ESE of Jefferson, Oklahoma
  14. 3.0 10 km W of Lamont, Oklahoma
  15. 1.6 10 km ESE of Jefferson, 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.