SANTA CRUZ DE TENERIFE, Dec. 10 (EUROPA PRESS) –
The lava emitted by the effusive focus located to the west of the main cone of the La Palma volcano continues to flow through volcanic tubes, one of which has several jameos from which two streams depart that move west over previous streams. The most active, which converged on the stream that emerged west of the Cogote Mountain (currently inactive), continues on the latter, falling on the lower island in the Las Hoyas area.
The director of the National Geographic Institute (IGN) in the Canary Islands and spokesperson for the Pevolca Scientific Committee, María José Blanco, reported at a press conference that the other emission centers of the main cone are very few active, with very sporadic pulses of strombolian activity , expulsion of ashes, and very intense gases. Likewise, the cracks and fractures in the upper part of the secondary cone have gradually modified its morphology, producing small landslides towards the interior and adjacent craters.
The technical director of Pevolca, Miguel Ángel Morcuende, stressed that in the last 24 hours there have been no particularly relevant events with respect to the eruption, although the dynamics of recent days in terms of the presence of gases in the southern area of the emergency, which is permanently monitored by the air quality services of the Government of the Canary Islands and by the Military Emergency Unit (UME).
Regarding the evolution of the streams, Miguel Ángel Morcuende explained that there has been no widening of streams 11 and 9, so today’s panorama is “substantially similar” to yesterday’s. In this sense, the lava continues to feed the lower island, especially through stream 9, and stream 11 is poorly fed and is still attached to stream 9.
Consequently, the total area affected by lava remains at 1,184 hectares, that of the lava deltas continues at 48.03 and the maximum width between external flows continues at 3,350 meters. On the other hand, so far 72,750 kilometers of roads have been affected.
Regarding the number of shelters, there are 547 people in hotel centers, 8 less than yesterday. Of the total, 398 are staying at the Fuencaliente hotel, 80 in Breña Baja and 69 in Los Llanos de Aridane. In addition, there are 43 dependent people cared for in insular health centers.
FAVORABLE SCENARIO FOR THE AIRPORT.
The height of the volcanic plume measured this morning was 1,200 meters, with an S-SW arrangement. In terms of meteorology, there is a predominance of the NE wind to component E from low levels to about 4,000 meters. The volcanic plume is expected to orient SW from the eruptive focus, which represents a favorable scenario for aeronautical operations.
Today Friday there is a probability of weak rainfall and wind from the NE with very strong gusts that can locally reach and exceed 70 km / h. At the end of today there is a probability of haze that can increase the values of PM10 particles due to the contribution of desert dust. The atmospheric instability situation will continue until the middle of next week.
Seismicity at intermediate depth, between 10 and 15 km, remains low and is located in the same areas. For its part, the number of earthquakes at depths greater than 20 km also remain low. The maximum magnitude reached in the last 24 hours was a 3.6 mbLg earthquake registered today at 11:08 am, at a depth of 10 km and felt with intensity III-IV on the European EMS scale. The tremor level is at low values and with little variability.
Regarding deformations, there are still no clear trends in the stations near the eruptive center and stable in the rest of the network.
Regarding the emission of sulfur dioxide associated with the volcanic plume, yesterday the emission rate was high, between 1,000 and 29,999 tons per day. The time series for the emission of this gas continues to reflect a downward trend since last September 23, when an extremely high emission was recorded, exceeding 51,000 tons per day. In the case of carbon dioxide (CO2) emissions associated with the Cumbre Vieja building, it continues to reflect an emission higher than the average value of the background levels and yesterday this diffuse emission was 5.5 times the average of this background level.
Regarding air quality, yesterday, regular and unfavorable levels were maintained in the Los Llanos, Tazacorte and Puntagorda stations, reaching a very unfavorable level in Los Llanos at 6:00 p.m. Throughout the day there were six exceedances of the hourly limit value in Los Llanos, one of which exceeded the alert threshold; three exceedances in Puntagorda, and one in Tazacorte. Values began to decline in the early evening until they reached good levels of air quality. However, as a result of the high concentrations recorded during the day, the daily limit value was exceeded in these three stations. In the rest, good air quality levels were maintained. During this morning, the values remain at good levels in all stations.
Regarding PM10 particles, yesterday there was a slight generalized increase in the concentrations registered in all the stations throughout the morning, being the one with the greatest intensity in the Los Llanos station, decreasing throughout the night of yesterday. During this morning, the dynamics of previous days continues, that is, an increase in concentrations is taking place in all stations but of low intensity, currently at good levels in the San Antonio station and reasonably good in the rest.