EARTHQUAKES · KARNES AREA · TX2023ISKU
Magnitude 2.7 17 km S of Nixon, Texas
Thursday, May 4, 2023, 5:11:01 PM Central · 2023-05-04 22:11:01 UTC
A magnitude 2.7 earthquake 17 km S of Nixon, Texas on May 4, 2023 at 5:11 PM Central, 7.3 km deep, in the Karnes County area.
It is one of 83 M2+ events located within 10 km of this spot, 3 of them in the thirty days before it; the largest nearby was M3.3.
7 active injection or disposal wells sit within 10 km, the nearest 5.2 km away and operated by Evx Operating LLC; together they hold 160,000 barrels a day of permitted capacity.
4 of the nearby wells report daily to TexNet; they injected 25,929 barrels a day in September 2026.
- M2.7
- ML, reviewed
- 7.3
- km deep · 24,073 ft
- 3
- M2+ within 10 km, prior 30 days
- 83
- M2+ within 10 km, all time
- 7
- active injection wells within 10 km
- 742
- permitted wells within 10 km
Location
- Epicenter
- 29.1130, -97.7380
- County area
- Karnes 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 |
|---|---|---|---|
| May 4, 2023, 8:24 PM | 2.6 | 0.5 km | 7.4 km |
| May 4, 2023, 9:13 PM | 2.4 | 0.6 km | 6.7 km |
| May 4, 2023, 11:40 AM | 2.2 | 0.9 km | 7.5 km |
| May 4, 2023, 11:39 AM | 2.0 | 1 km | 9.8 km |
| May 4, 2023, 8:50 AM | 2.4 | 0.5 km | 7.5 km |
| May 5, 2023, 6:22 PM | 2.1 | 0.2 km | 7.4 km |
| May 14, 2023, 4:39 PM | 2.2 | 4.3 km | 2.8 km |
| May 22, 2023, 3:36 AM | 2.9 | 8.4 km | 5.5 km |
| Mar 20, 2023, 10:32 PM | 2.4 | 9.9 km | 5.5 km |
| Jun 20, 2023, 4:24 PM | 2.5 | 5.3 km | 7.6 km |
| Jun 21, 2023, 12:04 PM | 2.2 | 6.2 km | 7.8 km |
| Jul 6, 2023, 9:15 AM | 2.0 | 6.3 km | 7.7 km |
Largest nearby on record: M3.3 on Sep 20, 2025.
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. 4 of these report daily to TexNet: 25.9K bbl/d in Sep 2026.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| Kerlick #1 | Evx Operating LLC | 000104506 | 5.2 km | 17,500 | 5,695–5,710 |
| Henning #2 | Pilot Water Solutions SWD LLC | 000115129 | 5.9 km | 25,000 | 5,300–7,950 |
| Gillett SWD #1 | Evx Operating LLC | 000105169 | 5.9 km | 20,000 | 8,950–11,950 |
| Lamza SWD #1 | Goodnight Midstream Permian, LLC | 000103533 | 6.4 km | 25,000 | 5,000–8,000 |
| Karnes SWD #1 | Crosstex Environmental STX, LLC | 000101718 | 7.9 km | 40,000 | 5,400–7,100 |
| Karnes SWD #1 | Pilot Water Solutions SWD LLC | 000104027 | 8 km | 25,000 | 5,400–7,100 |
| Wilke SWD #1 | Mid River Midstream LLC | 000076501 | 9 km | 7,500 | 5,000–5,484 |
Disposal in Karnes County → · How disposal permits and volumes work →
About this data
Event tx2023isku 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/tx2023isku, documented in the API reference.