Earthquake · reviewed by a seismologist
M 2.5ml
Earthquake near Karnes City, TX
No earthquake was likely felt in Karnes City in the 24 hours to 2:09 am CST (08:09 UTC). The last one was M 3.1, 101 km (63 mi) W, at 3:20 am CST on 12 November 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Karnes City
This page: a magnitude 2.5 earthquake was recorded 14 km (9 mi) northwest of Karnes City, TX, at 7:23 pm CDT on 30 April 2018 (00:23 UTC), 2.7 km deep.
USGS: 1 km ESE of Falls City, Texas
74 km (46 mi) SE of San Antonio, TX
- When
- 7:23 pm CDT on 30 April 2018 ()
- Where
- 14 km (9 mi) northwest of Karnes City, TX · earthquakes near Karnes City
- Texas today
- every earthquake in Texas in the last 24 hours
- Magnitude
- M 2.5 (ml)
- Depth
- 2.7 km below the surface
- Felt
- no reports yet
- Nearest
- Karnes County, 16 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 500 days ago
Earthquake alerts for Karnes City, TX
Get a notification in this browser when USGS records an earthquake near Karnes City, 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 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 Karnes City, 14 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: Karnes City 14 km, intensity III · Floresville 23 km, intensity II · Stockdale 29 km, intensity II · Nixon 40 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.
- Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
- Magna, Utah 2020 M 5.7 63,000× the energy of this one
- Around the size people start to feel M 3.0 5.6× the energy of this one
- 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
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 28.9750, -97.9990. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Karnes County, TX | 16 km (10 mi) | ESE | earthquakes near Karnes County |
| Wilson County, TX | 24 km (15 mi) | NNW | earthquakes near Wilson County |
| Atascosa County, TX | 53 km (33 mi) | W | earthquakes near Atascosa County |
| DeWitt County, TX | 63 km (39 mi) | E | earthquakes near DeWitt County |
| Goliad County, TX | 65 km (41 mi) | ESE | earthquakes near Goliad County |
| Bee County, TX | 67 km (42 mi) | SSE | earthquakes near Bee County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.7 19 km SW of Falls City, Texas
- 2.2 17 km S of Smiley, Texas
- 2.2 17 km S of Smiley, Texas
- 1.6 7 km E of Falls City, Texas
- 2.0 16 km SSE of Nixon, Texas
- 1.7 15 km ENE of Falls City, Texas
- 2.9 14 km NNW of Yorktown, Texas
- 1.9 11 km S of Smiley, Texas
- 1.5 17 km S of Nixon, Texas
- 2.1 15 km SSE of Nixon, Texas
- 1.7 14 km SSW of Nixon, Texas
- 2.6 19 km S of Nixon, Texas
- 1.8 11 km SSE of Smiley, Texas
- 1.9 10 km SSE of Smiley, Texas
- 2.1 15 km S of Nixon, 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.