27th February 2022

Martinique Mount Pelée volcano : 35 earthquakes recorded in one week

By la1ere.francetvinfo

Between February 18 and 25, 2022, the OVSM recorded at least 35 volcano-tectonic earthquakes of magnitude less than or equal to 0.5. These weak earthquakes were located inside the volcanic edifice between 0.5 and 1.2 km deep below the surface.

This superficial volcano-tectonic seismicity is associated with the formation of micro-fractures in the volcanic edifice. During the period of this report, the OVSM also recorded 1 hybrid type earthquake. This signal containing low frequencies is associated with the presence of fluids (gas, hydrothermal waters) in the volcanic edifice. None of these earthquakes was felt by the population.

The zone of degassing at sea at shallow depth between Saint-Pierre and Le Prêcheur is still observed. The IPGP took fluid samples in order to determine the origin of this degassing and to assess its possible relationship with the Mount Pelée hydrothermal system.

An extension of two zones of deteriorated vegetation located between Morne Plumé and the Rivière Chaude was observed during a helicopter flight carried out on February 9 with the support of Dragon 972, and confirmed by analysis of satellite images.

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