Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Anthony, KS
No earthquake was likely felt in Anthony in the 24 hours to 10:08 am CST (16:08 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 1.6 earthquake was recorded 19 km (12 mi) east-northeast of Anthony, KS, at 9:33 am CST on 20 November 2017 (15:33 UTC), 7.5 km deep.
USGS: 2 km E of Freeport, Kansas
69 km (43 mi) SW of Wichita, KS
- When
- 9:33 am CST on 20 November 2017 ()
- Where
- 19 km (12 mi) east-northeast of Anthony, KS · earthquakes near Anthony
- Magnitude
- M 1.6 (ml)
- Depth
- 7.5 km below the surface
- Felt
- no reports yet
- Nearest
- Harper County, 21 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3228 days ago
Earthquake alerts for Anthony, KS
Get a notification in this browser when USGS records an earthquake near Anthony, KS. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 6 km (4 mi) from the epicentre. 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.
Earthquakes near other towns within 30 km: Harper, Conway Springs, Caldwell.
How big was it?
This earthquake released about 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
- Around the size people start to feel M 3.0 110× the energy of this one
- This earthquake M 1.6 about 8.7 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 4.1 on 2017-03-29 — about 4,900 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 37.1997, -97.8292. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Harper County, KS | 21 km (13 mi) | W | earthquakes near Harper County |
| Sumner County, KS | 30 km (19 mi) | E | earthquakes near Sumner County |
| Grant County, OK | 46 km (29 mi) | S | earthquakes near Grant County |
| Kingman County, KS | 48 km (30 mi) | NW | earthquakes near Kingman County |
| Sedgwick County, KS | 63 km (39 mi) | NNE | earthquakes near Sedgwick County |
| Alfalfa County, OK | 68 km (42 mi) | SW | earthquakes near Alfalfa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.6 4 km NW of Braman, Oklahoma
- 3.0 4 km NW of Braman, Oklahoma
- 3.0 4 km NW of Braman, Oklahoma
- 1.6 3 km E of Freeport, Kansas
- 1.9 10 km N of Caldwell, Kansas
- 1.9 10 km N of Caldwell, Kansas
- 2.6 3 km NW of Freeport, Kansas
- 1.5 2 km S of Caldwell, Kansas
- 1.9 5 km WSW of Freeport, Kansas
- 2.3 12 km W of Belle Plaine, Kansas
- 1.6 7 km N of Argonia, Kansas
- 2.0 10 km N of Caldwell, Kansas
- 1.8 2 km SSE of Freeport, Kansas
- 2.3 2 km SSE of Freeport, Kansas
- 3.1 7 km N of Nardin, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.