EARTHQUAKES · KARNES AREA · TX2018QNSB
Magnitude 2.0 16 km SSE of Nixon, Texas
Thursday, August 23, 2018, 11:27:27 PM Central · 2018-08-24 04:27:27 UTC
A magnitude 2.0 earthquake 16 km SSE of Nixon, Texas on August 23, 2018 at 11:27 PM Central, 2.8 km deep, in the Karnes County area.
It is one of 81 M2+ events located within 10 km of this spot, 2 of them in the thirty days before it; the largest nearby was M2.9.
5 active injection or disposal wells sit within 10 km, the nearest 4.3 km away and operated by Pilot Water Solutions SWD LLC; together they hold 95,000 barrels a day of permitted capacity.
3 of the nearby wells report daily to TexNet; they injected 8,483 barrels a day in August 2026.
- M2.0
- ML, reviewed
- 2.8
- km deep · 9,081 ft
- 2
- M2+ within 10 km, prior 30 days
- 81
- M2+ within 10 km, all time
- 5
- active injection wells within 10 km
- 749
- permitted wells within 10 km
Location
- Epicenter
- 29.1270, -97.7020
- 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 |
|---|---|---|---|
| Aug 15, 2018, 11:20 PM | 2.1 | 1.1 km | 5.2 km |
| Sep 3, 2018, 12:01 PM | 2.2 | 6.9 km | 4.1 km |
| Sep 5, 2018, 8:53 AM | 2.2 | 4.4 km | 1.8 km |
| Aug 1, 2018, 9:23 AM | 2.1 | 9 km | 2.6 km |
| Dec 6, 2018, 10:11 PM | 2.4 | 8.8 km | 7.2 km |
| Apr 29, 2018, 11:59 AM | 2.7 | 9 km | 5.0 km |
| Jan 14, 2019, 6:38 PM | 2.6 | 2.9 km | 5.0 km |
| Jan 23, 2019, 9:34 AM | 2.5 | 9.5 km | 9.3 km |
| Mar 13, 2018, 3:35 AM | 2.6 | 7.7 km | 5.0 km |
| Mar 11, 2019, 3:16 AM | 2.0 | 0.4 km | 8.5 km |
| Mar 17, 2019, 9:32 PM | 2.5 | 0.6 km | 8.5 km |
| Apr 17, 2019, 10:45 PM | 2.4 | 9.7 km | 5.7 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. 3 of these report daily to TexNet: 8.48K bbl/d in Aug 2026.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| Henning #2 | Pilot Water Solutions SWD LLC | 000115129 | 4.3 km | 25,000 | 5,300–7,950 |
| Lamza SWD #1 | CWR Management LLC | 000103533 | 7.5 km | 25,000 | 5,000–8,000 |
| Kerlick #1 | Evx Operating LLC | 000104506 | 7.8 km | 17,500 | 5,695–5,710 |
| Wilke SWD #1 | Mid River Midstream LLC | 000076501 | 8.6 km | 7,500 | 5,000–5,484 |
| Gillett SWD #1 | Evx Operating LLC | 000105169 | 9 km | 20,000 | 8,950–11,950 |
Disposal in Karnes County → · How disposal permits and volumes work →
About this data
Event tx2018qnsb 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/tx2018qnsb, documented in the API reference.