EARTHQUAKES · KARNES AREA · TX2021OFOK
Magnitude 2.0 15 km SSE of Nixon, Texas
Thursday, July 22, 2021, 1:27:18 AM Central · 2021-07-22 06:27:18 UTC
A magnitude 2.0 earthquake 15 km SSE of Nixon, Texas on July 22, 2021 at 1:27 AM Central, 4.6 km deep, in the Karnes County area.
It is one of 67 M2+ events located within 10 km of this spot, none in the thirty days before it; the largest nearby was M2.9.
7 active injection or disposal wells sit within 10 km, the nearest 5 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 27,990 barrels a day in August 2026.
- M2.0
- ML, reviewed
- 4.6
- km deep · 14,999 ft
- 0
- M2+ within 10 km, prior 30 days
- 67
- M2+ within 10 km, all time
- 7
- active injection wells within 10 km
- 657
- permitted wells within 10 km
Location
- Epicenter
- 29.1290, -97.7310
- 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 |
|---|---|---|---|
| Jul 22, 2021, 7:50 AM | 2.6 | 0.5 km | 7.4 km |
| Jul 23, 2021, 10:31 AM | 2.0 | 1.9 km | 6.5 km |
| Apr 20, 2021, 10:23 AM | 2.0 | 7.2 km | 6.9 km |
| Mar 2, 2021, 2:58 PM | 2.5 | 4.1 km | 6.7 km |
| Mar 2, 2021, 7:50 AM | 2.0 | 2.8 km | 8.7 km |
| Nov 5, 2020, 3:45 PM | 2.7 | 6.4 km | 6.5 km |
| Nov 5, 2020, 10:39 AM | 2.7 | 6.2 km | 7.4 km |
| May 4, 2022, 10:23 AM | 2.2 | 3 km | 7.5 km |
| May 5, 2022, 4:07 PM | 2.0 | 3.7 km | 7.8 km |
| May 5, 2022, 5:00 PM | 2.1 | 3.4 km | 8.0 km |
| May 6, 2022, 8:22 AM | 2.1 | 3.3 km | 8.5 km |
| May 6, 2022, 10:40 AM | 2.1 | 3.6 km | 9.6 km |
Largest nearby on record: M2.9 on May 26, 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. 4 of these report daily to TexNet: 28K bbl/d in Aug 2026.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| Kerlick #1 | Evx Operating LLC | 000104506 | 5 km | 17,500 | 5,695–5,710 |
| Lamza SWD #1 | Goodnight Midstream Permian, LLC | 000103533 | 5.2 km | 25,000 | 5,000–8,000 |
| Gillett SWD #1 | Evx Operating LLC | 000105169 | 6.1 km | 20,000 | 8,950–11,950 |
| Henning #2 | Pilot Water Solutions SWD LLC | 000115129 | 6.2 km | 25,000 | 5,300–7,950 |
| Wilke SWD #1 | Mid River Midstream LLC | 000076501 | 7.4 km | 7,500 | 5,000–5,484 |
| Karnes SWD #1 | Crosstex Environmental STX, LLC | 000101718 | 9.7 km | 40,000 | 5,400–7,100 |
| Karnes SWD #1 | Pilot Water Solutions SWD LLC | 000104027 | 9.8 km | 25,000 | 5,400–7,100 |
Disposal in Karnes County → · How disposal permits and volumes work →
About this data
Event tx2021ofok 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/tx2021ofok, documented in the API reference.