Seismic activity moves westward

Seismic activity moves westward

Pre-eruptive seismic activity prompts the yellow traffic light and evacuations

Group: Geological report
Subgroup: SEIS – DIRDEF – DEF
Source: Noticias e informe mensual de vigilancia volc√°nica

The seismic activity appears to be moving westward and its depth has decreased. The surface deformation has reached 1.5 cm and shows a distribution compatible with the location of the seismicity. From the 13th of Sep, until 8:00 (UTC) today, 1365 earthquakes have been detected in the southern area of the island of La Palma, of which 61 have been located. The largest earthquake occurred today at 06:00 (UTC) with a provisional magnitude of 3.9 mbLg. The depth of earthquakes at this time is between 8 and 10 km. In the last hours, the seismicity apparently has a slight migration towards the west of the island. Surface deformation is also observed, both in the island’s network of GNSS stations and in the inclinometer. On the other hand, the GNSS network has registered an accumulated deformation since the beginning of the seismic series of 1.5 centimetres.

This diagram displays the seismic events as of the 11th of September 2021 on the island of La Palma. Sourced from Gobierno de Canarias (2021).
This diagram displays the seismic events as of the 11th of September 2021 on the island of La Palma. Sourced from Gobierno de Canarias (2021).
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