Seismic Swarm S20260307.1 Recorded South of Whites City, New Mexico
A seismic swarm designated S20260307.1 occurred 56 km south of Whites City in southeastern New Mexico. The sequence began at 01:05 on 7 March 2026 and concluded at 18:29 on 8 March 2026, spanning 41 hours and 24 minutes. During this period, 32 earthquakes were recorded.
The largest event reached magnitude 3.9 at a depth of 6 km on 7 March at 07:11:26 UTC. Other notable shocks included magnitudes 3.6, 3.0, and 2.8, with the majority occurring at depths between 3 km and 7 km. Activity was concentrated on 7 March, with a smaller number of events extending into the following day.
This swarm aligns with patterns observed in the region since 2000. A total of 29 swarms have been documented in the area, distributed across recent years as follows: one in 2022, nine in 2023, six in 2024, and thirteen in 2025.
The location lies within the Delaware Basin, a subdivision of the larger Permian Basin. This geologic province features thick sequences of Paleozoic sedimentary rocks, primarily carbonates and evaporites, overlying Precambrian basement. The basin formed during the late Paleozoic and has undergone multiple phases of subsidence and uplift. Modern seismicity in the area is frequently associated with fluid injection related to hydrocarbon production, which can alter pore pressure along pre-existing faults.
The swarm's shallow focal depths and rapid succession of events are consistent with fluid-driven triggering mechanisms commonly reported in the Permian Basin. No damage or felt reports beyond instrumental detection have been associated with this particular sequence.
References
USGS Earthquake Catalog
New Mexico Bureau of Geology and Mineral Resources – Permian Basin Studies
SeismoSight Internal Swarm Database