Teide volcano calms down after 6 hours of continuous tremors

TEIDE VOLCANO The seismic swarm under Tenerife's volcano began at 5.50am and stopped abruptly at around 12 noon yesterday (Tuesday). The Teide volcano once again put the people of Tenerife on alert yesterday as hundreds of earthquakes were recorded under and around Spain's highest peak. According to the Volcanological Institute of the Canary Islands (Involcán), the seismic swarm of hybrid events has recorded more than 630 registered events, all of low magnitude, since 05:50 (Canary Islands time) yesterday, 12 July. The events take place around Mount Teide at a depth of 9 to 12 kilometres. After the last update yesterday at 14:30 (Canary Islands time), the movement stopped at 12 noon, after which the seismic network of the Canary Islands returned to normal. This is the second swarm in less than a month, after a similar one was recorded in the same area on 17 June. Involcán points out that this swarm is most likely over, as IGN has since recorded only one earthquake in Tenerife, at 2.44am in Vilaflor de Chasnia with a magnitude of 1. After this event, others were recorded in the archipelago, in Tazacorte, La Palma (1.4 mbLg) and in Frontera, El Hierro (1.7 mbLg). It is very likely that the origin of this type of swarms is the movement of fluids such as steam, gas or water in the hydrothermal system of the Teide volcano. The swarm does not mean that the probability of an eruption is increasing, but it is a reminder that Tenerife is still a volcanically active island, says Involcán. The experts point out that the activity analysed under the Teide volcano indicates a rearrangement of the pressure in the lower part of the crust, due to the volcanic character of the island's edifice and magmatic processes at depth. This type of activity is to be expected on active volcanic islands and may remain at this depth or lead to lower seismic activity in the future without indicating an eruptive process in the near future. Series of this type have been recorded several times in the area over time, the first precedent being in 1980 in the Las Cañadas microseismicity campaign. At that time, it was assumed that this type of activity could recur. Like a replica of a drum The Spanish National Geographic Institute (IGN) and the CNIG have explained this type of event in a system with similar behaviour. The activity in all these series begins with the recording of a signal of long duration, without defined seismic phases and with a high frequency content, which passes into a long series of hundreds of events of small and similar magnitude, occurring at almost regular intervals in the form of a "drumbeat". In some places, the two types of signals coincide in time, the institute said. https://www.abc.es/espana/canarias/volcan-teide-calma-tras-horas-terremotos-constantes-20220713100827-nt.html