The technical director of the Volcanic Emergency Plan of Canaria (Pevolca), Miguel Ángel Morcuende, pointed out with respect to this gas that has been produced «An appreciable decrease yesterday [antes de ayer], which only confirms the general trend that is clearly downward ». To this is added the deflation of the land, which in the station located in Jedey, remains stable; seismicity, which continues for the sixth consecutive day around fifty tremors a day, and tremor -noise made by magmatic material as it rises through volcanic cones to the surface-, which although yesterday had a slight rise, from the beginning for the month of November is at “low” levels, as Pevolca points out in its daily report. Blanco again indicated, as he did last Sunday, that “the energy of the system continues to show a downward trend in recent days.”
This decrease in the presence of gas in the plume does not translate into a drop in the atmosphere. For the last three days, Pevolca has had to suspend convoys to remove ashes from homes and collect belongings in Las Manchas due to the high concentration of sulfur dioxide south of the Cumbre Vieja volcano, according to Morcuende. These episodes of contamination did not occur in the coastal area and farmers have been able to go to irrigate their crops in the towns of El Remo, Puerto Naos and La Bombilla. In Los Llanos de Aridane and Puntagorda, on the other hand, “quite unfavorable levels” were also registered, which were repeated in the early hours of yesterday but during the morning they fell to values ”that we could classify as regular,” Morcuende pointed out.
These records, together with those of particles smaller than 10 microns (PM10), are significantly affecting air quality in the Aridane Valley. In this sense, the technical director of Pevolca explained that the moments of high concentration derived from the expulsion of ashes are due in certain cases to “a greater movement of traffic” through the urban area, which put into “recirculation certain particles that were already deposited on the ground ‘. This event is reflected at night, when the amount of PM10 is low, and during the day, with an increase that coincides with the working day.
The ashes also reached the east face of the island yesterday, causing flight cancellations at the La Palma airport. At noon, operations were normalized by verifying that both the runway and the atmosphere were free of volcanic sand. And it is that the levels of PM10 improved with the passing of the hours. This made the Ministry of Education of the Government of the Canary Islands decide to resume the classroom activity in the educational centers of Los Llanos de Aridane, El Paso, Tazacorte, Tijarafe and Puntagorda, after classes were held online on Tuesday. Even so, the Pevolca maintains the recommendation for the population of these five municipalities They should consider reducing strenuous or prolonged outdoor activities and doing them indoors or when air quality improves.
The volcano, meanwhile, continues to expel lava that continues to feed the strip formed on the beach of Los Guirres, which continues with its daily growth until reaching 41.99 hectares, according to measurements carried out by the Geological and Mining Institute of Spain (IGME) . Part of this increase is occurring in the lava delta, which created the San Juan volcano in 1949 and is also causing the destruction of dozens of bushels of banana plantations in Las Hoyas. The data provided by Pevolca indicate that the total area of affected crops amounts to 305.59 hectares, with an increase of 9.91 between Sunday and Tuesday. This increase only affected banana plantations, which have already accumulated 179.36 hectares destroyed during the eruption by 59 of vineyards and 24 of avocados.
This advance of the lava through the farms is also reflected in the figures of buildings destroyed during the last days. The information provided by the Land Registry indicates that in the last 24 hours two new buildings had been destroyed, both related to agricultural use. Thus, a total of 1,462 buildings have so far been buried by volcanic material, of which 1,181 are for residential use, 152 agricultural, 67 industrial, 34 leisure and hospitality, 13 public and 15 among the so-called others.
Forecasts suggest that the lava will continue its advance, especially through flows 1, 2 and 9, which have joined in one to continue increasing the size of the Los Guirres strip after burying the beach of El Charcón. Likewise, the Pevolca indicated that the branch that originated last Monday and that could feed fronts 4 and 7, both located between the mountains of Todoque and La Laguna, slowed down without actually reactivating them on their way to the sea. from which they are 360 and 125 meters away respectively.