SANTA CRUZ DE TENERIFE, Oct 27 (EUROPA PRESS) –
The Cumbre Vieja volcano yesterday suffered a partial collapse of the upper part of the main cone, modifying its morphology and causing the lava flows to continue to flow west over the previous flows, mainly due to the original flow (number 1) and the one located north of the Todoque mountain (number 4), moving over already destroyed terrain and without causing further damage.
This was reported by the technical director of Pevolca, Miguel Ángel Morcuende, who highlighted at a press conference that the lava flow has continued to flow in the last 48 hours towards the west and focused towards the sea, filling gaps between flows that were not filled and growing in thickness and in height. As for colada 10, located to the south of the eruptive center and heading towards Corazoncillo, it is still stopped about 150 meters from the photovoltaic plant.
The director of Pevolca also highlighted that seismicity continues to be located at the same depths, between 10 and 15 km and over 20 km, and in the same areas as in recent days and almost weeks. In the last hours the number of events with magnitudes greater than 3.5 mbLg has increased, both at medium and deep depths, reaching the maximum magnitude of 4.9 mbLg and an intensity of IV-V.
Also, the high amplitude values of the tremor signal are maintained with intensification pulses. No significant surface seismicity is recorded and the level of seismicity continues to indicate that it is possible that more felt earthquakes will occur, being able to reach LV intensities on the EMS scale. Yesterday 24 felt earthquakes were registered, in particular two greater than 4 and all of them more than 30 km deep.
Miguel Ángel Morcuende also highlighted that the 10 cm deformation recorded yesterday at station LP03, near Jedey, has practically completely reversed, recovering the levels of previous days. At present there are no new relevant deformations and in the stations furthest from the eruptive center a slight regional deflation of deep origin persists.
As unfavorable data, Morcuende indicated that the emission of sulfur dioxide (SO2) associated with the plume continues at high values, reaching 37,350 tons per day yesterday. As for the diffuse emission of carbon dioxide (CO2) in the Cumbre Vieja building, after ten days of downward trend, it reached the value of 1,320 tons per day yesterday.
The number of people housed in hotel centers is currently 454. Of these, 65 are in a hotel center in Los Llanos de Aridane and 389 are staying in a hotel in Fuencaliente. All are being cared for by the Red Cross, in coordination with the municipal social services. In addition, there are 38 dependents in insular health centers.
The buildings destroyed or damaged, according to the data provided by the Cadastre, are estimated at 1,291 buildings, of which 1,038 are for residential use, 135 for agricultural use, 64 for industrial use, 30 for leisure and hospitality, 11 for public use and 14 from other uses.
Currently, several emission centers are still active with intermittent activity, both of pyroclasts and lava, varying as the configuration of the eruptive zone changes, with collapse of the cones and subsequent reconfiguration, cessation of activity of some of the centers, increase in the explosiveness, etc. The appearance of new emission centers is not ruled out, always in the vicinity of the main cone and within the exclusion zone. In addition, the measured height of the eruptive column this morning was 3,400 meters.
The next few hours will continue to blow the north component wind from the surface up to 5,500 meters, so that the ash plume and sulfur dioxide (SO2) will be available in the next 36-48 hours towards the southwest and west from the eruptive focus. This scenario is favorable for the operation of the Canarian airports and the arrival of fine ash to El Hierro island is not ruled out. Likewise, today and tomorrow there is a low probability of weak rainfall on the northern and eastern slopes of La Palma.
INCREASE IN CONCENTRATIONS.
Regarding air quality and regarding SO2, yesterday there was an increase in the values registered in the stations on the west side of the island, mainly in Los Llanos and Puntagorda, exceeding the hourly limit value in Los Llanos on one occasion and two in Puntagorda, with a concentration of 482 micrograms / m3 in the second exceedance in Puntagorda, very close to the alert threshold value, which is established at 500 micrograms / m3. Yesterday the daily limit value was not exceeded in any station.
As for today’s morning, a significant increase in concentrations is being recorded at the Los Llanos, Fuencaliente and Puntagorda stations, more intensely in Fuencaliente and Puntagorda. At the Fuencaliente station, the alert threshold has been exceeded with an hourly average of 702 micrograms / m3 at 09.00 hours, but the values have been subsequently decreasing. In Puntagorda the alert threshold was exceeded on three occasions, from 09:00 to 11:00, and the values appear to be decreasing.
Miguel Ángel Morcuende explained that these increases are occurring “very punctually” and, therefore, no new confinements are being considered. He also pointed out that so far there has been no report of any person who has had to be treated for having a problem with SO2.
In the case of Puntagorda, Morcuende announced that the management of Pevolca is working on a warning protocol, which will probably be ready tomorrow, so that in the event of certain threshold exceedances, immediately inform the population, such and as was done in El Paso or Los Llanos, and take measures such as reducing trips abroad, especially if it involves physical exercise, and use a FFP2 mask.
In relation to PM10 particles, values continue to be low below the daily hourly threshold in most of the island’s stations except in Los Llanos, where values above said threshold are recorded between 10 a.m. and 1 p.m. shrinking throughout yesterday morning. This Tuesday there were no exceedances of the daily threshold in any station and during the early hours and tomorrow of today the values have had low values in all the stations, except again in Los Llanos, where the values have been increasing during the first hours of the morning, currently standing above the daily threshold.