Increase in frequency and magnitude of earthquakes, but decrease in height of the eruptive column and slight deflation near the eruptive centre.

Increase in frequency and magnitude of earthquakes, but decrease in height of the eruptive column and slight deflation near the eruptive centre.

Earthquake magnitudes, intensity, and quantity increase and deflation of the eruptive centre is observed.

Group: Geological report
Subgroup: SEIS – PLUME – VOLTREM – SUB – EQPOP
Source: Noticias e informe mensual de vigilancia

There has been an increase in earthquakes observed both in the number of earthquakes and in their magnitudes with respect to previous days. Since yesterday, 75 earthquakes have been located in the southern part of the island of La Palma. Seventeen of them have been felt by the population and a maximum intensity value of III-IV (EMS). As in previous days, most of the seismicity is located 10-15 km deep. The mean amplitude of the volcanic tremor shows a slight progressive increase since yesterday morning. The column height measured at 7:30 UTC is 4,000 m, showing a slight descent of the eruptive cloud. The island’s network of permanent GNSS stations shows slight deflation in the vertical component of the stations near the eruptive centres.

This video shows the production of water vapour in the white cloud adjacent to a large dark ash column on the 4th of October. Sourced from IGME (2021).

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