10 Nov La Palma eruption update 10th November 2021: More deep earthquakes recorded
La Palma eruption – 10th November 2021
The size of the lava delta is increasing with the arrival of flow number 2 at the coast yesterday, which has increased the total area affected by lava flows by more than 10 hectares, with the total area affected now standing at 998 hectares. The fronts of the other lava flows remain stable however, as they have for the last couple of days. Outside of the affected areas, in order to secure the electricity supply to the surrounding towns, PEVOLCA have announced two sites for new backup electricity generation plants. The number of earthquakes increased again to 118, being recorded mostly at intermediate (10-15 km) depths with some deeper (35-40 km depth) events too, with the day’s largest earthquake being a mbLg 4.8 event at 34 km depth. The proportion of deeper earthquakes increased throughout the day.
At the closest GPS station to the eruption (LP03) near Jedey, some variable deformation reflecting eruption dynamics continue to be seen, with slight regional deflation seen at the rest of the stations. SO2 emissions showed a marked decrease relative to the 9th, at 13,000-15,000 tons per day, whilst the ash and gas plume reached 1800 m. However, satellite measurements imply current SO2 emissions show a downward trend since the start of the eruption. Currently, tremor remains stable at low levels as in the last days. Air quality remained improved for a second day compared to the previous week. SO2 levels were good-reasonably good in all stations except Puntagorda, which was at regular levels and exceeded the daily threshold (125 μg/m3). PM10 concentrations were again lower in Los Llanos, between fair and unfavourable levels, whilst concentrations were between good and reasonably good in the other stations. Again, the daily threshold (50 μg/m3) for PM10 was not exceeded in any of the stations.
Sources: Government of the Canary Islands, PEVOLCA, Involcan, IGN, DSN, Cabildo La Palma, 112 Canarias, Tolouse VAAC, Copernicus EMS
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