Location:

Period:

24 Jun 2012 21:26:01 - 1 Jul 2012 10:13:36 (6 days 12 hours 47 minutes)

Volcanoes in 100km radius:

Hierro(12km)

Earthquakes:

345

9 swarms found nearby.

2011

VS20110723.1(10.2km)

22 Jul

21 hours

25 earthquakes

S20110805.1(12.3km)

4 Aug

1 day 19 hours

41 earthquakes

S20110808.1(11.9km)

7 Aug

3 days 8 hours

64 earthquakes

VS20110913.1(9.7km)

12 Sep

1 day 10 hours

32 earthquakes

S20110927.2(10.5km)

26 Sep

11 days 23 hours

305 earthquakes

2012

S20120702.1(1.1km)

2 Jul

8 days 13 hours

183 earthquakes

VS20120915.1(13.2km)

14 Sep

3 days 1 hours

53 earthquakes

2013

S20130319.1(8.8km)

18 Mar

23 hours

29 earthquakes

S20130322.1(17.6km)

21 Mar

10 days 6 hours

476 earthquakes

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Seismic Swarm VS20120625.1: Analysis of Activity in the Canary Islands Region

The Canary Islands, an archipelago of volcanic origin situated approximately 100 kilometers off the northwestern coast of Africa, form part of Spain and lie within a tectonically active zone influenced by the African plate and the Canary hotspot. This geological setting produces frequent seismic events linked to magma movement and volcanic processes. The islands feature shield volcanoes, with notable structures such as Teide on Tenerife and the Cumbre Vieja ridge on La Palma. Historical records indicate multiple periods of unrest, including the 2011 seismic swarm preceding the submarine eruption off El Hierro. Seismic swarm VS20120625.1 occurred in the Canary Islands region from 21:26 on 24 June 2012 to 10:13 on 1 July 2012. Over 156 hours and 47 minutes, the swarm registered 345 earthquakes. Analysis of the first 100 events reveals a pattern of low-to-moderate magnitude activity concentrated at depths of 18 to 22 kilometers. Magnitudes ranged primarily between 2.5 and 3.1, with one peak event reaching 3.8 on 25 June at 09:03:44. Depths remained relatively consistent, suggesting a stable source zone possibly associated with deeper magmatic or hydrothermal processes. Temporal distribution showed initial clustering on 24 and 25 June, with events occurring at intervals of minutes to hours. Magnitudes exhibited minor fluctuations but stayed below 4.0, indicative of swarm-type behavior rather than a mainshock-aftershock sequence. Depths showed slight variations, occasionally shallowing to 16 kilometers or deepening to 22 kilometers, consistent with fluid migration in volcanic crust. Historical data for the region since 1 January 2000 document five swarms, with the earliest occurring in 2011. This context positions VS20120625.1 as part of recurring unrest episodes tied to the islands' volcanic evolution.

References

Instituto Geográfico Nacional (IGN) seismic catalogs for Canary Islands activity.
Geological Survey of Spain (IGME) reports on Canary hotspot volcanism.
Peer-reviewed studies in Journal of Volcanology and Geothermal Research on regional swarms.