Easter Seismic Swarm Detected Under Mount Teide
Holy Week in the Canary Islands has brought more than just religious fervour, afternoon socialising, beach trips and family time. The bustle of the spring holidays has also stirred Mount Teide from the silence it had maintained for several weeks. Specifically, from 10:47 pm on 3 April (Good Friday), the National Geographic Institute (IGN) began detecting new seismic-volcanic activity beneath the island of Tenerife.
Nature of the Seismic Events
As on other occasions, this activity is a mixture of almost imperceptible pulses or vibrations and some very low-intensity earthquakes. The activity, which was continuing three days later, has so far consisted of 131 of these hybrid seismic events. IGN researchers have managed to locate 31 of them. The magnitudes of these small tremors are very weak, ranging from 0.4 to 1.6 mbLg, making them undetectable to the public. The earthquakes are located at depths between 5 and 18 kilometres below sea level, similar to the activity of recent weeks.
No Short-Term Eruption Risk
For now, according to the IGN, “this activity does not present a repetitive pattern in the form of families like the activity observed since February.” This type of activity, composed of hybrid seismic events accompanied by long-period signals (known as LP events), does not increase the risk of an eruption in the short or medium term on the island of Tenerife.
Comprehensive Volcanic Monitoring
The IGN, as the body responsible for volcanic monitoring in Spain, has deployed a network of more than 100 fixed stations, equipment and sampling points on the island. This allows for the monitoring and evaluation of the most significant parameters with current technology, enabling comprehensive real-time tracking of any change, alteration or anomaly in seismicity, ground deformation and geochemistry that could indicate an evolution in the short, medium or long-term danger of a volcanic eruption. Furthermore, the island of Tenerife has the facilities of the Canary Islands Volcanological Institute (Involcan), which also carries out measurements on Teide.
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