Location:

Period:

5 Apr 2010 00:31:16 - 11 Apr 2010 00:08:01 (5 days 23 hours 36 minutes)

Volcanoes in 100km radius:

Prieto, Cerro(22km), Salton Buttes(85km)

Earthquakes:

131

24 swarms found nearby.

2000

VS20001102.1(18.7km)

2 Nov

2 days 22 hours

63 earthquakes

2002

S20020222.1(21.0km)

22 Feb

6 days 19 hours

453 earthquakes

S20020303.1(25.2km)

2 Mar

4 days 12 hours

88 earthquakes

2005

VS20050510.1(21.8km)

9 May

9 days 8 hours

196 earthquakes

2008

VS20080209.1(23.4km)

9 Feb

19 days 1 hours

830 earthquakes

S20080626.1(23.3km)

25 Jun

21 hours

27 earthquakes

VS20081120.1(19.3km)

20 Nov

2 days 0 hours

35 earthquakes

2009

S20090920.1(27.4km)

19 Sep

2 days 5 hours

46 earthquakes

S20091102.1(28.2km)

1 Nov

4 days 17 hours

286 earthquakes

S20091108.1(24.6km)

8 Nov

1 day 14 hours

54 earthquakes

S20091126.1(28.3km)

26 Nov

1 day 0 hours

35 earthquakes

2010

S20100405.1(7.0km)

4 Apr

48 days 21 hours

7938 earthquakes

PS20100405.1(33.1km)

4 Apr

1 hours

5 earthquakes

S20100405.2(16.0km)

4 Apr

20 days 15 hours

840 earthquakes

S20100405.4(16.0km)

4 Apr

7 days 6 hours

271 earthquakes

S20100406.1(25.1km)

5 Apr

4 days 7 hours

57 earthquakes

S20100408.1(4.8km)

7 Apr

27 days 1 hours

638 earthquakes

S20100602.1(26.0km)

2 Jun

8 days 18 hours

98 earthquakes

S20100620.1(17.3km)

19 Jun

13 days 17 hours

161 earthquakes

S20100701.1(15.7km)

30 Jun

2 days 2 hours

35 earthquakes

S20101210.1(29.2km)

9 Dec

5 days 20 hours

59 earthquakes

2011

S20110409.1(25.6km)

8 Apr

2 days 21 hours

41 earthquakes

2024

S20240512.1(29.8km)

12 May

2 days 10 hours

93 earthquakes

S20241009.2(28.5km)

8 Oct

22 hours

25 earthquakes

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

Seismic Swarm S20100405.8 Near Delta, Baja California

Seismic swarm S20100405.8 was recorded 18 km west of Delta, Baja California, Mexico. Activity began at 00:31 on 5 April 2010 and concluded at 00:08 on 11 April 2010, spanning 143 hours and 36 minutes. A total of 131 earthquakes were registered during this period.

The region lies along the Pacific-North American plate boundary within the Gulf of California rift system. This tectonic setting features right-lateral transform faults and short spreading centers that accommodate oblique extension. Delta is situated near the Cerro Prieto fault and adjacent pull-apart basins, where shallow crustal seismicity is common. Historical records show that earthquake swarms have occurred repeatedly in this area since at least 2000, with 15 documented swarms between 2000 and 2010. These include one swarm in 2000, two in 2002, one in 2005, three in 2008, four in 2009, and four in 2010.

Analysis of the first 100 events reveals predominantly low-magnitude activity. Magnitudes ranged from 1.5 to 4.4, with the majority falling between 2.0 and 3.2. Only one event exceeded magnitude 4.0 (4.4 at 01:58 on 6 April). Depths were shallow, clustering around 9 km for most events, with occasional deeper occurrences up to 19 km and several at or near the surface. The initial hours on 5 April featured multiple events near magnitude 3.0 at 9 km depth, followed by a gradual increase in frequency. Peak activity occurred on 6 April, including the swarm’s largest shock. Subsequent days showed a decline in both magnitude and rate, with many events below magnitude 2.5 by 8 April.

Such swarms are characteristic of fluid-driven or aseismic slip processes along transform segments in the Gulf of California. The consistent shallow depths align with the brittle upper crust in this extensional regime. No damage or felt reports beyond the immediate area were associated with this sequence.

References

SeismoSight internal swarm classification S20100405.8
USGS Earthquake Catalog (regional tectonics)
Global CMT Project (plate boundary models)