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Location:
7 km WSW of Holtville, CA
Period:
15 Jan 2026 09:40:11 - 17 Jan 2026 04:10:30 (1 day 18 hours 30 minutes)
Volcanoes in 100km radius:
Prieto, Cerro(44km), Salton Buttes(47km)
Earthquakes:
81
28 swarms found nearby.
2000
14 Jun
2 days 16 hours
145 earthquakes
2003
S20030301.1(15.7km)
1 Mar
23 hours
52 earthquakes
S20030524.1(20.6km)
23 May
1 day 22 hours
161 earthquakes
2005
31 Jan
1 day 5 hours
32 earthquakes
2008
2 Jun
4 days 11 hours
54 earthquakes
2009
S20090924.1(25.8km)
24 Sep
19 hours
28 earthquakes
S20091102.1(23.8km)
1 Nov
4 days 17 hours
286 earthquakes
S20091108.1(22.8km)
8 Nov
1 day 14 hours
54 earthquakes
S20091126.1(24.5km)
26 Nov
1 day 0 hours
35 earthquakes
2010
PS20100405.1(65.9km)
4 Apr
1 hours
5 earthquakes
S20100406.1(24.1km)
5 Apr
4 days 7 hours
57 earthquakes
S20100602.1(29.0km)
2 Jun
8 days 18 hours
98 earthquakes
S20101215.1(25.8km)
15 Dec
1 day 4 hours
101 earthquakes
2011
15 Jul
2 days 3 hours
36 earthquakes
2012
S20120826.1(24.2km)
26 Aug
11 days 23 hours
972 earthquakes
2016
26 Nov
2 days 0 hours
50 earthquakes
S20161231.1(21.3km)
31 Dec
3 days 4 hours
317 earthquakes
2017
13 Mar
12 hours
24 earthquakes
7 Aug
16 hours
40 earthquakes
2019
S20190115.1(10.3km)
15 Jan
4 hours
24 earthquakes
12 Nov
1 day 4 hours
84 earthquakes
2021
S20210611.1(19.2km)
11 Jun
4 hours
26 earthquakes
2022
S20220420.1(15.5km)
19 Apr
3 days 1 hours
71 earthquakes
2023
S20230428.1(14.2km)
28 Apr
4 days 3 hours
186 earthquakes
2024
12 Feb
3 days 2 hours
363 earthquakes
S20240518.1(16.9km)
18 May
2 days 19 hours
306 earthquakes
2025
1 Jan
2 hours
28 earthquakes
2026
S20260510.1(21.7km)
9 May
4 days 16 hours
477 earthquakes
AI-generated article — for informational and entertainment purposes only. May contain inaccuracies. Full disclaimerFound an error?

Seismic Swarm S20260115.1 Near Holtville, California

SeismoSight recorded seismic swarm S20260115.1 beginning at 09:40 on 15 January 2026 and concluding at 04:10 on 17 January 2026. The sequence occurred 7 km west-southwest of Holtville in California's Imperial Valley and comprised 81 earthquakes over 42 hours and 30 minutes.

The events ranged in magnitude from 0.7 to 4.0, with the largest shock registering at 09:54 on 15 January at a depth of 16 km. Most events clustered between 5 km and 15 km depth, consistent with shallow crustal faulting. Activity peaked in the first several hours, featuring multiple events above magnitude 2.0, before gradually declining through 17 January.

Holtville lies within the Imperial Valley portion of the Salton Trough, a tectonically active rift zone formed by the interaction of the Pacific and North American plates. The region experiences right-lateral strike-slip motion along the Imperial Fault and related structures of the Brawley Seismic Zone. These faults accommodate a significant fraction of plate-boundary strain south of the San Andreas Fault.

Historical records show recurrent earthquake swarms in the Imperial Valley. Since 2000, 27 swarms have been documented in the area, occurring in 2000 (1), 2003 (2), 2005 (1), 2008 (1), 2009 (4), 2010 (4), 2011 (1), 2012 (1), 2016 (2), 2017 (2), 2019 (2), 2021 (1), 2022 (1), 2023 (1), 2024 (2), and 2025 (1). Such swarms typically reflect fluid migration or aseismic slip along fault segments rather than foreshock-mainshock-aftershock sequences driven by a single large rupture.

The 2026 swarm's magnitude distribution and depth range align with patterns observed in prior Imperial Valley sequences. No damage or felt reports beyond minor shaking were associated with the largest event.

References
United States Geological Survey Earthquake Catalog
California Geological Survey Fault Activity Map
Southern California Earthquake Data Center
SeismoSight internal swarm classification database