Location:

Period:

19 Oct 2000 22:03:07 - 22 Oct 2000 17:58:31 (2 days 19 hours 55 minutes)

Volcanoes in 100km radius:

None

Earthquakes:

41 swarms found nearby.

2000

S20000510.1(24.7km)

9 May

3 days 11 hours

40 earthquakes

S20000909.1(16.7km)

9 Sep

5 days 12 hours

111 earthquakes

S20001122.1(11.1km)

21 Nov

1 day 6 hours

42 earthquakes

2002

S20020104.1(15.6km)

3 Jan

3 days 1 hours

61 earthquakes

S20020526.1(15.1km)

25 May

12 days 2 hours

136 earthquakes

S20020614.1(15.6km)

13 Jun

36 days 2 hours

1659 earthquakes

S20020720.1(15.2km)

19 Jul

89 days 17 hours

1357 earthquakes

S20021204.1(15.0km)

3 Dec

7 days 15 hours

89 earthquakes

2003

S20030525.1(14.1km)

24 May

4 days 16 hours

88 earthquakes

S20031117.1(16.0km)

16 Nov

1 day 14 hours

32 earthquakes

2005

S20051019.1(16.1km)

18 Oct

4 days 12 hours

59 earthquakes

S20051107.1(13.6km)

6 Nov

2 days 19 hours

69 earthquakes

2006

S20060626.1(9.8km)

25 Jun

8 days 12 hours

129 earthquakes

2007

S20070623.1(15.5km)

23 Jun

1 day 6 hours

40 earthquakes

S20070707.1(9.7km)

6 Jul

4 days 3 hours

89 earthquakes

2008

S20080515.1(13.5km)

14 May

6 days 3 hours

70 earthquakes

S20080614.2(16.8km)

14 Jun

3 days 1 hours

42 earthquakes

S20080922.2(14.4km)

21 Sep

9 days 14 hours

133 earthquakes

S20081005.1(17.6km)

5 Oct

27 days 12 hours

359 earthquakes

S20081207.1(11.8km)

6 Dec

5 days 16 hours

55 earthquakes

2009

S20090109.1(15.9km)

8 Jan

3 days 17 hours

48 earthquakes

S20090701.1(19.2km)

30 Jun

8 days 13 hours

88 earthquakes

S20090726.2(16.5km)

25 Jul

29 days 18 hours

381 earthquakes

S20091205.1(13.8km)

4 Dec

2 days 7 hours

34 earthquakes

2010

S20100202.1(16.9km)

1 Feb

3 days 5 hours

44 earthquakes

S20100212.2(15.8km)

12 Feb

7 days 8 hours

89 earthquakes

S20100604.1(12.0km)

3 Jun

1 day 7 hours

32 earthquakes

2012

S20120601.1(14.0km)

31 May

5 days 2 hours

101 earthquakes

2014

S20140416.1(19.9km)

16 Apr

1 day 19 hours

32 earthquakes

2015

S20150722.1(4.7km)

21 Jul

3 days 19 hours

218 earthquakes

S20150907.1(16.5km)

6 Sep

1 day 10 hours

26 earthquakes

S20151017.1(13.8km)

16 Oct

2 days 3 hours

47 earthquakes

2016

S20160228.1(16.7km)

27 Feb

1 day 4 hours

38 earthquakes

S20161211.1(10.6km)

10 Dec

4 days 3 hours

49 earthquakes

S20161218.1(0.7km)

17 Dec

1 day 1 hours

27 earthquakes

2022

S20220117.1(10.6km)

16 Jan

2 days 14 hours

49 earthquakes

S20220519.1(29.6km)

18 May

1 day 5 hours

37 earthquakes

2024

S20240118.1(6.2km)

18 Jan

8 hours

51 earthquakes

S20240419.1(5.3km)

18 Apr

2 days 16 hours

66 earthquakes

2025

S20250210.1(5.7km)

9 Feb

3 days 18 hours

77 earthquakes

S20250730.2(15.8km)

29 Jul

2 days 0 hours

60 earthquakes

AI-generated article — for informational and entertainment purposes only. May contain inaccuracies. Full disclaimerFound an error?

Seismic Swarm S20001020.1: Analysis of Activity Near Pahrump, Nevada

SeismoSight recorded seismic swarm S20001020.1 beginning at 22:03 on 19 October 2000 and concluding at 17:58 on 22 October 2000. The sequence unfolded 48 km NNW of Pahrump, Nevada, spanning 67 hours and 55 minutes with a total of 98 earthquakes.

Event magnitudes ranged from -0.3 to 3.4, with the largest shock occurring at 14:02 on 20 October at a depth of 4 km. Depths clustered primarily between 0 and 8 km, indicating shallow crustal sources typical of the region’s extensional regime. The swarm exhibited a rapid onset followed by a gradual decline in frequency, consistent with fluid-driven or stress-triggered sequences rather than a single mainshock-aftershock pattern.

The Pahrump area lies within the southern Basin and Range province, where northwest-directed extension along normal and strike-slip faults accommodates tectonic strain between the Sierra Nevada and the stable North American interior. Historical seismicity in this portion of Nye County reflects ongoing deformation along the Death Valley–Furnace Creek fault system and related structures. Instrumental records since 2000 document two swarms in the immediate vicinity, with S20001020.1 representing the earliest.

This swarm’s temporal distribution shows peak activity within the first 24 hours, after which event rates decreased steadily. Most events remained below magnitude 2.0, underscoring the low-energy character of the sequence while still providing valuable data on local fault behavior and crustal permeability.

Continued monitoring of similar sequences contributes to refined hazard assessments for nearby communities and infrastructure. The shallow focal depths observed reinforce the importance of incorporating swarm statistics into probabilistic seismic models for the western Great Basin.

References

SeismoSight internal swarm classification database
USGS Earthquake Catalog (regional tectonic framework)