EARTHQUAKES · FRIO AREA · TX2018XRXO
Magnitude 2.4 19 km WSW of Charlotte, Texas
Monday, December 3, 2018, 8:31:56 PM Central · 2018-12-04 02:31:56 UTC
A magnitude 2.4 earthquake 19 km WSW of Charlotte, Texas on December 3, 2018 at 8:31 PM Central, 4.1 km deep, in the Frio County area.
It is one of 197 M2+ events located within 10 km of this spot, none in the thirty days before it; the largest nearby was M2.8.
2 active injection or disposal wells sit within 10 km, the nearest 3.1 km away and operated by Oilfield Cleantech Water Rec LLC; together they hold 10,800 barrels a day of permitted capacity.
- M2.4
- ML, reviewed
- 4.1
- km deep · 13,550 ft
- 0
- M2+ within 10 km, prior 30 days
- 197
- M2+ within 10 km, all time
- 2
- active injection wells within 10 km
- 61
- permitted wells within 10 km
Location
- Epicenter
- 28.7940, -98.8880
- County area
- Frio 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 16, 2019, 5:55 PM | 2.5 | 5.6 km | 6.2 km |
| May 27, 2019, 2:33 PM | 2.2 | 9.7 km | 5.1 km |
| May 28, 2019, 1:38 AM | 2.1 | 9.9 km | 6.2 km |
| May 29, 2019, 9:05 PM | 2.3 | 9.9 km | 6.1 km |
| Jun 3, 2019, 12:20 PM | 2.0 | 8.7 km | 5.6 km |
| Aug 3, 2017, 10:40 PM | 2.0 | 9.3 km | 3.3 km |
| Mar 14, 2022, 8:04 AM | 2.0 | 8.8 km | 2.3 km |
| Mar 15, 2022, 10:48 AM | 2.5 | 8.9 km | 5.6 km |
| Feb 19, 2023, 7:57 AM | 2.2 | 9.6 km | 3.0 km |
| Jun 8, 2024, 10:17 PM | 2.2 | 7.1 km | 3.8 km |
| Jan 9, 2025, 9:02 AM | 2.1 | 9.9 km | 9.0 km |
| Jan 9, 2025, 12:31 PM | 2.0 | 9.5 km | 7.9 km |
Largest nearby on record: M2.8 on Sep 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.
| Well | Operator | UIC no. | Distance | Permitted, bbl/d | Injection zone, ft |
|---|---|---|---|---|---|
| Keystone/Keystone Ranch #4 | Oilfield Cleantech Water Rec LLC | 000089858 | 3.1 km | 800 | 4,776–5,368 |
| Brooks-Barrett-405-STX #C111VW | Formentera Operations LLC | 000127761 | 8.3 km | 10,000 | 4,685–5,175 |
Disposal in Frio County → · How disposal permits and volumes work →
About this data
Event tx2018xrxo 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/tx2018xrxo, documented in the API reference.