Experts from the University of Seville and the Laboratory of Astronomy, Geodesy and Cartography of the University of Cádiz have published a study in 'Journal of Geodynamics' in which they analyze the behavior of the geodynamic zone of the island of Tenerife. Although the objective of the study was not the behavior between the two areas, it has been observed that there is a union process of the islands of Tenerife and Gran Canaria, which could be caused by the action of a fault between the two islands.
"The values of interplate displacement detected between the island of Tenerife and Gran Canaria are millimetric, so given the distance between the islands (approximately 64 kilometers), millions of years will have to pass until they join, which could be due to possible shearing, the movements are latent, and also, at this moment, there could be new elements to consider", emphasizes the professor of the University of Seville, Cristina Torrecillas.
What is a reality today is that there is a gravitational collapse or isostatic adjustment of the Teide after the volcanic crisis of 2004. This phenomenon has been detected thanks to the data provided by the GPS stations located in the areas around the island of Tenerife, with millimeter values every year. On the other hand, it has also been observed that the fissure of the northeast is expanding, possibly due to the action of a secondary fault that isolates the mountain range of Anaga in the central part of the island.
After the Teide volcanic crisis in 2004, caused by a multitude of not very intense earthquakes, the need arose to control the geodynamics of the island of Tenerife, so initially seven landmarks were established distributed around the island. Two of them were configured in constant observation mode and the rest in periodic annual campaigns.
Since 2008, other public agencies have implemented seven new reference points with continuous public access observation stations. Together, these two networks are known as Tegeteide's GNSS network, and this study was based on their data.
"Volcanology is a complex and multidisciplinary science, but it is more than proven that the deformation of the surface in active zones generally preceded seismic or volcanic events, this technique has been applied in the case of the recent eruption on the neighboring island of El Iron, but it was not until 2015 that a study was published in the journal Science about the predictive action with magmatic intrusions", explains the researcher.