Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Pleasanton, TX
No earthquake was likely felt in Pleasanton in the 24 hours to 7:48 am CST (13:48 UTC). The last one was M 3.1, 46 km (29 mi) WSW, at 3:20 am CST on 12 November 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Pleasanton
This page: a magnitude 1.7 earthquake was recorded 31 km (19 mi) east-southeast of Pleasanton, TX, at 11:38 pm CDT on 20 September 2018 (04:38 UTC), 7.8 km deep.
USGS: 19 km SW of Falls City, Texas
74 km (46 mi) SSE of San Antonio, TX
- When
- 11:38 pm CDT on 20 September 2018 ()
- Where
- 31 km (19 mi) east-southeast of Pleasanton, TX · earthquakes near Pleasanton
- Texas today
- every earthquake in Texas in the last 24 hours
- Magnitude
- M 1.7 (ml)
- Depth
- 7.8 km below the surface
- Felt
- no reports yet
- Nearest
- Karnes County, 32 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 499 days ago
Earthquake alerts for Pleasanton, TX
Get a notification in this browser when USGS records an earthquake near Pleasanton, TX. 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 10 km (6 mi) from the epicentre. In Pleasanton, 31 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: Poth, Karnes City, Floresville.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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 4.0 on 2018-05-01 — about 2,800 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 28.8750, -98.1740. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Karnes County, TX | 32 km (20 mi) | E | earthquakes near Karnes County |
| Wilson County, TX | 34 km (21 mi) | NNE | earthquakes near Wilson County |
| Atascosa County, TX | 35 km (22 mi) | W | earthquakes near Atascosa County |
| Live Oak County, TX | 58 km (36 mi) | S | earthquakes near Live Oak County |
| Bee County, TX | 66 km (41 mi) | SE | earthquakes near Bee County |
| McMullen County, TX | 67 km (42 mi) | SW | earthquakes near McMullen County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 2.0 9 km NNE of Three Rivers, Texas
- 2.1 12 km N of Three Rivers, Texas
- 2.3 12 km N of Three Rivers, Texas
- 2.7 12 km N of Three Rivers, Texas
- 2.7 7 km N of Three Rivers, Texas
- 2.0 6 km ENE of Three Rivers, Texas
- 2.3 8 km NNE of Three Rivers, Texas
- 2.5 10 km NNW of Three Rivers, Texas
- 3.1 13 km N of Three Rivers, Texas
- 2.5 23 km WNW of Pawnee, Texas
- 1.5 9 km ENE of Falls City, Texas
- 1.9 9 km ENE of Falls City, Texas
- 1.9 9 km ENE of Falls City, Texas
- 2.1 16 km NNW of Pawnee, Texas
- 1.7 16 km NNW of Pawnee, Texas
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.