New pyroclastic cone forms and collapses

New pyroclastic cone forms and collapses

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The number of earthquakes recorded and felt by the population reduce

Renewed phreatomagmatic and strombolian activity

Since the last statement, a total of 77 earthquakes have been located in the area, 5 of them felt by the population. 76 of these earthquakes are located at depths of 9-18 km and only one at a depth of around 30 km. The maximum recorded magnitude is 4.2 (mbLg) during yesterday’s earthquake at 21:11 UTC, with a depth of 11 km and an intensity of V. The amplitude of the tremor signal is kept at low levels. The island’s network of permanent GNSS stations shows a vertical elevation increase of about 6 cm at station LP03, which is the closest to the eruptive centres. LP01, a GNSS station located further from the eruptive centres than LP03 continues to register slight deflation. Using a calibrated image IGN estimated at 08:30 UTC, an ash cloud height of 1,900 masl and a scattering cloud in the south-southwest direction. The height of the cone is measured obtaining a value of 1.125 masl. Persistent strombolian activity has been observed on the north east flank since December 1st (IGN, 2021). Yesterday, on the 2nd of December lava fountains rose 400-500 m above the North East flank vent, forming a new pyroclastic cone which collapsed and were transported downslope by lava flows which impacted Tacande highway. A new fissure opened on the South East flank of the main cone which produced Strombolian activity and fast-moving lava flows that traveled South West (GVP, 2022).

This video taken on the 3rd of December shows slowly advancing lava flows which originate from the Northeast vent. On the Northwest of Tajogaite sulfur, deposits can be observed. Sourced from IGME (2021).

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