27 Dec A new maximum number of daily earthquakes so far is reached.
A new maximum number of daily earthquakes so far is reached
Rapid increase in number of seismic events and slight increase in average magnitude.
Ash plume climbs rapidly as phreatomagmatic activity increases.
Since the last statement, 230 earthquakes have been located in the area. The largest earthquakes in this period were two earthquakes of 4.7
and 4.8 mbLg at 12:33 UTC yesterday recorded with a few seconds difference between them, both located at depths greater than 35km. The maximum intensity associated with these earthquakes was IV. Earthquake hypocentres have a similar bi-modal distribution to previous days; a first group at a depth of 10-15 km and a second group with depths greater than 30 km. The volcanic tremor signal, which had increased since November 16th, fell sharply around 6:00 pm yesterday, coinciding with the re-establishment of the emission activity. The island’s network of permanent GNSS stations shows a gradual slowing down of the deformation towards the south at station LP03, which is the closest to the eruptive centres. Using a calibrated image a column height of 3,500 masl and an ash cloud of 3,000 masl in a southwesterly direction was estimated by IGN 09:02 UTC.
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