The Volcanological Institute of the Canary Islands (Involcan) has recorded the sounds of the seismic swarm of Cumbre Vieja. “This is the sonification of a part of the seismic swarm that is being registered in La Palma these days. The seismogram registered by the PTAB seismic station (Taburiente) of the Canary Seismic Network between 12:00 and 15:00 canaria) of this Thursday, has been accelerated 200 times in the sonification process, “he explains.” You can clearly hear the thousands of earthquakes that were recorded during a rebound in seismicity observed in this interval, “he adds.
La Palma has not stopped registering tremors for a week, located mainly in the Cumbre Vieja area, a natural park that spans six municipalities and covers a good part of the south of the island. which is in a situation of yellow alert due to volcanic risk (level 2 of 4). In total, the seismic series has already accumulated more than 20,650 earthquakes in seven days.
This type of phenomenon occurs when several earthquakes are concentrated in space and time. In the case of the Cumbre Vieja seismic swarm, the origin has been a magnetic intrusion that has caused the magma from the interior to enter the consolidated earth’s crust. It is not strange. Nine have been detected on La Palma since 2017 and seismic swarms have been recorded on all the volcanically active islands, although these are not synonymous with the risk of an eruption.
The yellow at the traffic light for volcanic risk on La Palma indicates that the affected municipalities can continue with their routine activities, but paying attention to the authorities. In addition, there are some recommendations for this level: renew the supplies that may be necessary in an emergency, such as a first-aid kit, candles, flashlights, radio, batteries, hygiene items, and have water and food reserves, and notify those responsible of the Local Emergency Plan if there are people with disabilities, pregnant women or the elderly in the family and if there is a second residence in unaffected areas.
From midnight this Friday to Saturday, La Palma’s seismic surveillance network has detected fifty earthquakes on the island. Among them, one of magnitude 3.2 in Tazacorte, with a focus on the surface (zero depth), which has been felt in several population centers in the municipalities of Tazacorte, Los Llanos de Arindane, El Paso and Mazo, but which has not caused damage. According to the National Geographic Institute, the movement, of 3.2 on the Richter scale, occurred at 4.26 in the morning.