Location:

Period:

25 Apr 2014 02:52:45 - 1 May 2014 05:55:25 (6 days 3 hours 2 minutes)

Volcanoes in 100km radius:

Mono Lake Volcanic Field(81km), Mono-Inyo Craters(99km)

Earthquakes:

211

18 swarms found nearby.

2011

S20110123.1(5.1km)

22 Jan

14 hours

27 earthquakes

S20110414.1(29.0km)

13 Apr

51 days 10 hours

3166 earthquakes

S20110715.1(29.2km)

14 Jul

2 days 14 hours

34 earthquakes

2012

S20120819.1(16.3km)

18 Aug

2 days 8 hours

45 earthquakes

2014

S20140114.1(7.9km)

13 Jan

16 days 23 hours

461 earthquakes

S20140421.1(2.4km)

20 Apr

1 day 6 hours

28 earthquakes

2015

S20150911.1(8.4km)

11 Sep

2 days 20 hours

39 earthquakes

S20150918.1(16.7km)

18 Sep

5 days 5 hours

88 earthquakes

S20151218.1(2.1km)

17 Dec

18 hours

29 earthquakes

2016

S20160130.1(10.1km)

30 Jan

1 day 7 hours

28 earthquakes

S20160321.1(12.3km)

21 Mar

17 days 6 hours

779 earthquakes

S20160411.1(26.5km)

10 Apr

2 days 12 hours

51 earthquakes

S20160927.1(14.3km)

26 Sep

3 days 15 hours

44 earthquakes

S20161204.1(22.2km)

3 Dec

1 day 20 hours

47 earthquakes

2017

S20170102.1(14.0km)

2 Jan

1 day 10 hours

31 earthquakes

2018

S20180729.1(15.3km)

29 Jul

5 days 5 hours

96 earthquakes

2023

S20230716.1(24.7km)

15 Jul

2 days 13 hours

50 earthquakes

2024

S20240824.1(15.3km)

23 Aug

2 days 18 hours

51 earthquakes

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Earthquake Swarm S20140426.1 Near Hawthorne, Nevada

An earthquake swarm designated S20140426.1 was recorded 15 km east-northeast of Hawthorne, Nevada, from 02:52 on 25 April 2014 until 05:55 on 1 May 2014. Over the 147-hour duration, 211 events were detected, providing a detailed record of seismic activity in this portion of western Nevada. The swarm occurred within the Basin and Range province, where crustal extension along normal and strike-slip faults generates frequent small-magnitude seismicity. Hawthorne lies near the Walker Lane belt, a zone of distributed shear that accommodates a portion of Pacific–North American plate motion. Regional faults, including segments of the Wassuk Range fault system, have produced both historical and instrumental earthquakes, with most events occurring at depths of 5–10 km. Analysis of the first 100 events reveals a rapid onset followed by a decaying rate of activity. Magnitudes ranged from –0.3 to 3.8, with the largest event (magnitude 3.8) occurring at 00:12 on 26 April at 7 km depth. The majority of hypocenters clustered between 4 km and 9 km, although a few events reached 11–12 km. Negative and near-zero magnitudes indicate a high detection threshold, typical of dense local networks during swarm sequences. Temporal distribution showed an initial energetic burst within the first 12 hours, after which activity became more sporadic, with isolated events exceeding magnitude 1.5. This swarm is the sixth recorded since 2000 in the immediate area. Earlier episodes occurred in 2011 (three swarms), 2012 (one swarm), and earlier in 2014 (one swarm). Such recurrent swarms suggest episodic fluid migration or aseismic slip along favorably oriented faults rather than mainshock–aftershock sequences driven by a single large rupture. Seismic swarms of this character are common in the western Great Basin and rarely produce damage, yet they supply valuable data for refining local velocity models and fault-slip rates. Continued monitoring remains essential for distinguishing background seismicity from potential precursors to larger events on nearby structures.

References

U.S. Geological Survey Earthquake Catalog
Nevada Seismological Laboratory regional reports
SeismoSight internal swarm classification S20140426.1