EARTHQUAKES · ZAVALA AREA · TX2026UNJCGI
Magnitude 2.1 16 km WNW of Carrizo Springs, Texas
Sunday, October 18, 2026, 8:19:33 AM Central · 2026-10-18 13:19:33 UTC
A magnitude 2.1 earthquake 16 km WNW of Carrizo Springs, Texas on October 18, 2026 at 8:19 AM Central, 7.0 km deep, in the Zavala County area.
It is one of 14 M2+ events located within 10 km of this spot, 10 of them in the thirty days before it; the largest nearby was M3.5.
15 active injection or disposal wells sit within 10 km, the nearest 3.7 km away and operated by Atlas Operating LLC; together they hold 6,650 barrels a day of permitted capacity.
- M2.1
- ML, reviewed
- 7.0
- km deep · 22,848 ft
- 10
- M2+ within 10 km, prior 30 days
- 14
- M2+ within 10 km, all time
- 15
- active injection wells within 10 km
- 60
- permitted wells within 10 km
Location
- Epicenter
- 28.5630, -100.0240
- County area
- Zavala County
- On a map
- Google Maps ↗
- Catalog
- USGS event page ↗ · TexNet catalog ↗
Around it in time and space
M2+ events within 10 km, nearest in time first.
| When | Mag | Distance | Depth |
|---|---|---|---|
| Oct 18, 2026, 8:08 AM | 2.2 | 9.5 km | 6.1 km |
| Oct 18, 2026, 3:21 AM | 2.0 | 9.8 km | 7.7 km |
| Oct 17, 2026, 10:48 PM | 2.2 | 7.2 km | 3.9 km |
| Oct 17, 2026, 11:16 AM | 2.6 | 9.2 km | 2.2 km |
| Oct 17, 2026, 8:30 AM | 3.5 | 9.7 km | 6.0 km |
| Oct 16, 2026, 4:21 PM | 2.2 | 9.2 km | 8.7 km |
| Oct 16, 2026, 3:11 PM | 2.6 | 7.9 km | 7.6 km |
| Oct 16, 2026, 8:09 AM | 2.6 | 5.8 km | 5.8 km |
| Oct 16, 2026, 12:58 AM | 2.2 | 7.3 km | 3.0 km |
| Oct 14, 2026, 1:28 AM | 2.2 | 7.5 km | 5.3 km |
| Oct 11, 2025, 1:12 PM | 2.2 | 7.6 km | 5.3 km |
| May 9, 2024, 2:18 AM | 2.5 | 9.9 km | 5.0 km |
Largest nearby on record: M3.5 on Oct 17, 2026.
Injection wells within 10 km
RRC UIC MASTER · ACTIVE PERMITS
Proximity is not attribution. The wells are listed because the question is always asked; whether any of them is connected to this event is for the RRC's seismic response review, not this page.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| South Pena Creek Unit #449 | Atlas Operating LLC | 000076367 | 3.7 km | 150 | 3,198–3,217 |
| South Pena Creek Unit #451 | Atlas Operating LLC | 000076368 | 3.8 km | 150 | 3,186–3,208 |
| South Pena Creek Unit #447 | Atlas Operating LLC | 000061553 | 4.1 km | 1,000 | 3,206–3,224 |
| South Pena Creek Unit #493 | Atlas Operating LLC | 000076373 | 4.1 km | 150 | 3,140–3,184 |
| South Pena Creek Unit #407 | Atlas Operating LLC | 000096893 | 4.2 km | 250 | 3,146–3,184 |
| South Pena Creek Unit #446 | Atlas Operating LLC | 000075866 | 4.3 km | 250 | 3,166–3,188 |
| South Pena Creek Unit #406 | Atlas Operating LLC | 000096894 | 4.3 km | 250 | 3,162–3,197 |
| Pena Creek Unit #42 | Atlas Operating LLC | 000075871 | 4.4 km | 250 | 3,119–3,151 |
| South Pena Creek Unit #403 | Atlas Operating LLC | 000061545 | 4.5 km | 1,000 | 3,170–3,204 |
| South Pena Creek Unit #404 | Atlas Operating LLC | 000076364 | 4.5 km | 150 | 3,194–3,228 |
| South Pena Creek Unit #452 | Atlas Operating LLC | 000061578 | 4.5 km | 1,000 | 3,170–3,188 |
| South Pena Creek Unit #445 | Atlas Operating LLC | 000075862 | 4.6 km | 250 | 3,152–3,192 |
| Pena Creek Unit #46W | Atlas Operating LLC | 000045548 | 4.6 km | 300 | 3,114–3,125 |
| South Pena Creek Unit #402 | Atlas Operating LLC | 000061576 | 4.6 km | 1,000 | 3,176–3,209 |
| Pena Creek Unit #34 | Atlas Operating LLC | 000075870 | 4.8 km | 500 | 3,175–3,290 |
Disposal in Zavala County → · How disposal permits and volumes work →
About this data
Event tx2026unjcgi from the USGS earthquake catalog, located by TexNet (UT Bureau of Economic Geology) and refreshed daily. Nearby wells from the RRC UIC well master and permit coordinates; daily volumes from the TexNet injection reporting tool.
Developers: this page as JSON is GET /v1/data/earthquakes/tx/events/tx2026unjcgi, documented in the API reference.