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La Palma volcano eruption update: eruption intensifies intermittently

Mo, 13. Dez 2021, 23:10
23:10 PM | VON: T
Lava fountaining and ash emissions this afternoon (image: INVOLCAN / Twitter)
Lava fountaining and ash emissions this afternoon (image: INVOLCAN / Twitter)
Current tremor amplitude past 7 days (image: IGN)
Current tremor amplitude past 7 days (image: IGN)
Seismic signal TBT station since yesterday (image: IGN)
Seismic signal TBT station since yesterday (image: IGN)
Aerial view of active lava flows in the area south of Todoque this morning (image: La Palma government / opendatalapalma.es)
Aerial view of active lava flows in the area south of Todoque this morning (image: La Palma government / opendatalapalma.es)
Time vs depth of quakes under La Palma during the past days
Time vs depth of quakes under La Palma during the past days
After yesterday's large explosion at noon, the eruption gained in intensity, both explosive and effusive, during the evening and night. After being quieter most of the day today, it increased again in the evening, shown by the strongly fluctuating volcanic tremor signal.
Phases of strong ash emissions and lava fountains have been alternating with quiet periods when only steaming could be seen at the craters:
Ash plumes reached 4,200 m above sea level this morning, and reportedly up to 7,000 m in the afternoon, and drifted southeast. Absence of wind near the ground created very high SO2 concentrations in El Paso today, with values surpassing 2.590 micrograms per cubic meter this morning.
Lava continues to flow from the (hidden) vents on the western base of the cone into the tube system and crate breakouts in the central part of the flow field. One of the more active surface flows began to eat away one of the remaining islands of so-far untouched land in the area south of Todoque and east of Las Norias, as can be seen in the aerial drone image attached.

The number of quakes has again increased in numbers: During the past 24 hours, there have been 4 quakes of magnitudes 3.0-3.4 and 46 quakes between 2.0 and 2.9. Most of these occurred at the shallow layer around 10-15 km depth while only very few ones occurred at the deeper layer of 30 km or below.
The decrease of seismic activity in the deeper layer might indicate that magma supply from that area is less now than during previous weeks when lots of magnitude 4+ quakes occurred there, but this remains speculative.
No significant changes in deformation has been recorded.

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