QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5mb_lg

Earthquake near Stockton, KS

No earthquake was likely felt in Stockton in the 24 hours to 3:16 am CST (09:16 UTC). The last one was M 3.0, 39 km (24 mi) WSW, at 5:54 pm CDT on 28 September 2026, estimated intensity III (weak) in town; 8 felt reports to USGS. Every earthquake near Stockton

This page: a magnitude 2.5 earthquake was recorded 11 km (7 mi) north-northeast of Stockton, KS, at 10:30 am CDT on 22 August 2025 (15:30 UTC), 5.0 km deep.

USGS: 11 km NNE of Stockton, Kansas

10:30 am CDT, Aug 22, 2025 · · 5.0 km deep · released about 170 lb of TNT

10 km30 km60 km120 km N Rooks County 23 kmPhillips County 31 kmOsborne County 42 kmSmith County 46 kmGraham County 62 kmNorton County 67 kmEllis County 69 kmHarlan County 75 kmFranklin County 76 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
10:30 am CDT on 22 August 2025 ()
Where
11 km (7 mi) north-northeast of Stockton, KS · earthquakes near Stockton
Magnitude
M 2.5 (mb_lg)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Rooks County, 23 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 364 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. In Stockton, 11 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: Stockton 11 km, intensity III · Phillipsburg 28 km, intensity II · Plainville 33 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 since 2016 was M 4.6 on 2019-06-22 — about 1,400 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 39.5245, -99.1974. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Rooks County, KS 23 km (14 mi) SSW earthquakes near Rooks County
Phillips County, KS 31 km (20 mi) NNW earthquakes near Phillips County
Osborne County, KS 42 km (26 mi) ESE earthquakes near Osborne County
Smith County, KS 46 km (28 mi) NE earthquakes near Smith County
Graham County, KS 62 km (38 mi) WSW earthquakes near Graham County
Norton County, KS 67 km (41 mi) WNW earthquakes near Norton County

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

Aftershocks so far

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

  1. 3.0 2 km SSW of Bogue, Kansas
  2. 2.5 9 km SW of Natoma, Kansas
  3. 2.4 12 km NE of Damar, Kansas
  4. 2.9 5 km SW of Kirwin, Kansas
  5. 2.8 10 km SSW of Stockton, Kansas
  6. 2.8 8 km NNW of Stockton, Kansas
  7. 3.3 7 km NNW of Stockton, Kansas
  8. 2.5 1 km NE of Zurich, Kansas

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.