Location:

Period:

19 Jun 2019 04:06:17 - 20 Jun 2019 09:43:24 (1 day 5 hours 37 minutes)

Volcanoes in 100km radius:

Soda Lakes(79km)

Earthquakes:

103

41 swarms found nearby.

2003

S20031009.1(25.1km)

8 Oct

2 days 19 hours

40 earthquakes

2004

S20040603.1(26.0km)

2 Jun

8 days 0 hours

197 earthquakes

2008

S20080308.1(12.3km)

8 Mar

2 days 8 hours

85 earthquakes

S20080314.1(8.9km)

14 Mar

26 days 23 hours

841 earthquakes

S20080411.1(12.5km)

11 Apr

55 days 20 hours

13408 earthquakes

S20080608.1(9.4km)

7 Jun

20 days 22 hours

426 earthquakes

S20080712.1(12.5km)

12 Jul

20 hours

33 earthquakes

S20080730.1(10.7km)

29 Jul

4 days 1 hours

76 earthquakes

S20081121.2(27.4km)

21 Nov

1 day 17 hours

26 earthquakes

2010

S20101204.1(16.0km)

3 Dec

1 day 22 hours

32 earthquakes

2012

S20120408.2(29.8km)

8 Apr

2 days 17 hours

45 earthquakes

S20121012.1(15.8km)

11 Oct

4 days 5 hours

108 earthquakes

2013

S20130304.1(6.9km)

3 Mar

1 day 4 hours

32 earthquakes

S20130314.1(17.4km)

13 Mar

1 day 19 hours

44 earthquakes

S20130317.1(18.9km)

17 Mar

1 day 18 hours

135 earthquakes

S20130321.2(18.5km)

20 Mar

5 days 20 hours

251 earthquakes

S20130325.1(15.5km)

24 Mar

1 day 1 hours

36 earthquakes

S20130728.1(12.2km)

27 Jul

1 day 0 hours

25 earthquakes

S20130731.1(10.0km)

31 Jul

2 days 18 hours

57 earthquakes

S20130827.1(16.1km)

26 Aug

30 days 22 hours

944 earthquakes

2014

S20140110.1(14.7km)

10 Jan

5 days 9 hours

169 earthquakes

S20140120.1(14.7km)

19 Jan

3 days 3 hours

91 earthquakes

S20140129.1(25.9km)

28 Jan

4 days 1 hours

297 earthquakes

S20140619.1(16.6km)

19 Jun

1 day 17 hours

115 earthquakes

S20140623.1(28.9km)

22 Jun

1 day 19 hours

28 earthquakes

2015

S20150127.1(17.9km)

26 Jan

4 days 13 hours

73 earthquakes

S20150408.1(28.7km)

8 Apr

2 days 9 hours

57 earthquakes

S20151018.1(19.0km)

18 Oct

1 day 6 hours

38 earthquakes

S20151223.1(15.6km)

23 Dec

1 day 7 hours

136 earthquakes

2016

S20160319.2(27.1km)

18 Mar

20 hours

29 earthquakes

S20161124.1(19.9km)

23 Nov

2 days 6 hours

34 earthquakes

2017

S20170729.1(29.2km)

29 Jul

14 hours

26 earthquakes

2018

S20180112.1(20.3km)

12 Jan

8 days 3 hours

354 earthquakes

S20180522.1(22.9km)

22 May

15 hours

26 earthquakes

S20180528.1(19.5km)

27 May

20 hours

24 earthquakes

S20180801.1(21.8km)

1 Aug

2 days 7 hours

38 earthquakes

2023

S20230602.1(14.8km)

1 Jun

3 days 5 hours

45 earthquakes

S20231230.1(0.7km)

29 Dec

4 days 23 hours

117 earthquakes

2024

S20240126.1(22.2km)

25 Jan

2 days 3 hours

57 earthquakes

S20240129.1(19.1km)

28 Jan

5 days 10 hours

90 earthquakes

S20240214.1(19.3km)

13 Feb

2 days 18 hours

70 earthquakes

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

Seismic Swarm S20190619.1: Analysis of Activity Near Sun Valley, Nevada

Seismic swarm S20190619.1 was recorded 2 km southeast of Sun Valley, Nevada, beginning at 04:06 on 19 June 2019 and concluding at 09:43 on 20 June 2019. Over 29 hours and 37 minutes, the sequence produced 103 earthquakes. Analysis of the first 100 events reveals predominantly low-magnitude activity, with values ranging from -0.5 to 1.8. Depths clustered between 3 km and 10 km, indicating shallow crustal sources consistent with regional faulting patterns.

The sequence initiated with microseismic events near magnitude 0.0, followed by a gradual increase in both frequency and peak magnitudes around 07:21. Notable events included a magnitude 1.7 at 07:23 and another at 08:39, both at 8 km depth. Later activity featured a magnitude 1.8 at 13:56 on 19 June. The distribution shows episodic bursts separated by quieter intervals, a hallmark of swarm behavior rather than a mainshock-aftershock sequence.

Sun Valley lies within the Basin and Range Province of western Nevada, where active normal faulting accommodates ongoing east-west crustal extension. The region forms part of the northern Walker Lane belt, a zone of distributed shear and transtension that transfers motion between the Pacific and North American plates. This tectonic setting produces frequent small earthquakes and occasional swarms along Quaternary faults. Historical records document elevated seismicity rates in the Reno-Sun Valley area, driven by the same extensional regime responsible for regional basin formation.

Since 1 January 2000, 36 swarms have occurred in the vicinity. Annual counts include single swarms in 2003, 2004, 2010, and 2017; seven in 2008; two in 2012; eight in 2013; five in 2014; four in 2015 and 2018; and two in 2016. These episodes underscore persistent swarm activity linked to fluid migration and fault interactions within the extensional stress field.

The 2019 swarm aligns with this established pattern, exhibiting similar magnitude ranges and depth distributions. Such events rarely produce surface rupture or significant damage but contribute valuable data on local stress conditions and fault connectivity. Continued monitoring supports improved characterization of seismic hazard in this rapidly urbanizing portion of northern Nevada.

References

USGS Earthquake Catalog (earthquake.usgs.gov)
Nevada Seismological Laboratory historical records
SeismoSight internal swarm classification data