Ash and sulfur dioxide affect the airspace between La Palma, La Gomera and west of Tenerife


The emission of a considerable volume of ash from the Cumbre Vieja volcano continues this Tuesday, like the three previous days, and has covered the entire west and northeast sector of the island of La Palma, a phenomenon that has been accompanied by short episodes of audible bursts that could be caused by intense degassing.

This was reported at a press conference by the national director of Volcanic Surveillance of the National Geographic Institute (IGN) and spokesperson for the Pevolca Scientific Committee, Carmen López, who also indicated that in the last hours the high rate of lava emission from the source continues emitter from the northwest flank of the main cone, and in the pouring zone 11 there has been a slight advance of the lava flow that moves towards the west, approaching the LP-211 highway.

The height of the cone and the scattering cloud today reaches a height of 3,700 meters. Regarding the disposal of ash and sulfur dioxide (SO2), it is in an east-southeast direction, and this represents an unfavorable scenario for the next 36 hours for the operation of La Palma Airport, as well as for the airspace included between La Palma, La Gomera and the west of Tenerife. Likewise, tomorrow Wednesday there is a probability of weak rains in the northwest of La Palma, which may be locally moderate during Thursday.

In relation to seismicity, it continues to be located in the same areas and at the same depths, between 10 and 15 km and greater than 20 km. The maximum magnitude in the last 24 hours has been a 4.6 mbLg earthquake that occurred yesterday at 8:24 pm and 36 km deep, which has been felt with maximum intensity IV and which has also been slightly felt in La Gomera and Tenerife.

As for the deformations, the same scenario continues in the stations near the eruptive center, where stability is recorded, and in the higher stations a slight regional deflation continues.

Yesterday the emission of sulfur dioxide associated with the volcanic plume registered a value of 22,000 tons per day, with the use of remote sensors in mobile maritime disposal, and in the case of the diffuse emission of carbon dioxide (CO2) associated At the Cumbre Vieja ridge, an upward trend has been observed since October 22 and the last measurement gives a value of 1,520 tons per day.

“Extremely unfavorable”

Air quality due to sulfur dioxide was at ‘very unfavorable’ and ‘extremely unfavorable’ levels at the Puntagorda station between 00:00 and 05:00. Subsequently, these values ​​fell significantly from 08.00 hours, remaining at ‘good’ or ‘reasonably good’ values ​​for the rest of the day. In the rest of the stations the levels are also ‘good’ and ‘reasonably good’.

PM10 particles remain at ‘good’ levels at the air quality stations on the east side of the island, and at the Los Llanos station there is an ‘unfavorable’ quality index that is still maintained. Yesterday the daily threshold at this station was exceeded and today’s records continue to be high, reflecting the incidence of ash fall from the volcano, which is highly influenced by the eruptive dynamics and daily winds.

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