Members of the INVOLCAN technical team walk through the ash of the Cumbre Vieja volcano as they head to the crater, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

Members of the INVOLCAN technical team walk through the ash of the Cumbre Vieja volcano as they head to the crater, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

David Martinez and Perla Pina, geophysicists of INVOLCAN, install measuring stations near the crater of the Cumbre Vieja volcano, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

Members of the UME and of the Spanish Geological Institute (IGME) take measurements and monitor temperatures and sulfur levels near the crater, following the eruption of the Cumbre Vieja volcano, on the Canary island of La Palma, Jan. 16, 2022.

An aerial view of the crater as members of UME and Spanish Geological Institute (IGME) take measurements and monitor temperatures and sulfur levels near the crater, following the eruption of the Cumbre Vieja volcano, on the Canary island of La Palma, Jan. 16, 2022.

A thermometer screen reads "775.3°C" (1,427.54 degrees Fahrenheit) as members of UME and Spanish Geological Institute (IGME) take measurements and monitor temperatures and sulfur levels near the crater, following the eruption of the Cumbre Vieja volcano, on the Canary island of La Palma, Jan. 16, 2022.

Members of the INVOLCAN technical team take measurements next to the crater of the Cumbre Vieja volcano, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

Members of the INVOLCAN technical team take measurements next to the crater of the Cumbre Vieja volcano, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

A member of the Spanish Geological Institute (IGME) taking measurements and monitoring temperatures and sulfur levels near the crater, following the eruption of the Cumbre Vieja volcano, on the Canary island of La Palma, Jan. 16, 2022.

INVOLCAN geophysicists David Martinez and Perla Pina install measuring stations near the crater of the Cumbre Vieja volcano, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

Members of the INVOLCAN technical team take measurements next to the crater of the Cumbre Vieja volcano, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.

Pedro Hernandez, a vulcanologist of INVOLCAN, observes the main crater of the Cumbre Vieja volcano, in Cabeza de Vaca, on the Canary Island of La Palma, Spain, Jan. 21, 2022.