Hybrid seismic swarm recorded in Tenerife, Spain
A hybrid seismic swarm was recorded in Tenerife from 18:34 to approximately 23:00 LT (17:34 to 22:00 UTC) on July 3, 2026, according to the Canary Islands Volcanological Institute (INVOLCAN). The institute said the episode does not change the likelihood of a volcanic eruption on the island in the short or medium term.
Satellite image of Tenerife, Canary Islands, Spain on June 28, 2026. Credit: CopernicusEU/Sentinel-2, The Watchers
INVOLCAN identified the episode as the 14th hybrid-event swarm detected in Tenerife since October 2, 2016. Its chronology lists earlier swarms on October 2, 2016, June 14, 2019, June 17 and 12, 2022, November 14, 2024, August 7, 2025, and February 12–13, 16–17, 18–20, 22, 23–24, 24, and 25–26, 2026.
As in earlier episodes, INVOLCAN’s most likely hypothesis is that the swarms are associated with the injection of hydrothermal volatiles of magmatic origin into Tenerife’s hydrothermal system.
The institute said the process has been observed regularly since 2016 and cited increased diffuse CO2 emissions at Teide crater and slight ground deformation in the northeastern sector of the Teide volcanic edifice as independent geochemical and geophysical evidence.
INVOLCAN said the underlying process remains active and shows no evidence of remission.
“From INVOLCAN, we want to convey a message of tranquility: this new swarm of hybrid seismic events implies no changes in the likelihood of a volcanic eruption in Tenerife in the short or medium term.”
Teo Blašković founded The Watchers in 2011 and edited it until 2026, covering seismic and volcanic activity, extreme weather, space weather and near-Earth objects. Articles on this page are his archive.
