The lava that has sprouted from inside the Old Summit has blurred the orography from the Aridane Valley. As it passes by the east slope of La Palma, the laundry of molten rock have erased personal memories, homes, livelihoods and infrastructure. But they have also eliminated the ravines through which the water flowed in times of rain. These natural channels no longer exist and, if heavy or very heavy rainfall is recorded (5 millimeters per hour or 60 per day), the new route of the waterways sewer system make La Laguna a vulnerable area. Lava has created “a wall” that forces the water to flow towards the coast parallel to that wall, which did not exist two months ago. Following this path, the channel would flow into the basin located in the northern part of the La Laguna mountain. To mitigate this problem derived from the volcanic emergency, the Geological and Mining Institute (IGME), the Spanish Institute of Oceanography (IEO), the College of Civil Engineers and the Cabildo de La Palma are studying the hydrological works that will be necessary to reduce the risk of flooding or flooding.
The technical director of Canary Islands Special Volcanic Risk Protection Plan (Pevolca), Miguel Ángel Morcuende, warned about the serious damage that the rain added to the ash could cause and explained that the important thing is to channel the waters and correct the channels to minimize the vulnerability of La Laguna, but also of neighborhoods such as Las Manchas, Jedey or La Bombilla, where the risk, since the lava has modified the orography of the entire Valley. This study will serve to take precautions against the rains of these days, but also to carry out long-term actions that avoid the danger once the volcanic eruption concludes. Morcuende recalled that to avoid personal injury it is necessary for the population to avoid the areas of troughs and rainwater evacuation when rains occur and also the areas of slopes that may be unstable and cause landslides.
The opening of a new emission center on the eastern flank of the cone fed stream 10 – the one located further south – and its advance ended up devastating the Las Manchas cemetery, which had been besieged since the first week of the eruption, the field of solar panels and numerous single-family homes. In addition, the magma continues to feed the streams that pass between the mountains of Todoque and La Laguna, but without destroying new terrain in the area.
The area affected by the passage of the lava rises to 1,092 hectares. The southern fajana, the one that grows on the Los Guirres beach, already has 48.03 hectares, while the north adds 5.05 hectares. According to the latest data from Cadastre There are 1,506 buildings destroyed by magma on La Palma. Of these, 1,212 are for residential use, 161 for agriculture, 67 for industrial use, 36 for leisure and hospitality, 13 for public use and 16 for other uses. The terrestrial surveillance satellites of the European Copernicus program estimate that in total there are 2,789 buildings destroyed. It should be remembered that Copernicus does not distinguish between infrastructures in use or small unfinished or abandoned buildings.
The deep and intermediate seismicity are still at low values compared to previous weeks and the tremor is also low, although it presents slight with rebounds. Both earthquakes The most important ones recorded yesterday were 3.5 and occurred at 2.50 and 17.51 hours, at a depth of 13 and 27 kilometers, both with an epicenter in Fuencaliente.
The number of relocated people has risen to 513, of which 412 are in a hotel in Fuencaliente, 31 in Breña Baja and 70 in Los Llanos de Aridane. To these are added 43 dependent people who are being cared for in different social health centers on the island.
A week without airplanes
Today marks a week since the landing and take-off of the last planes at La Palma airport. The accumulation of ash from the Cumbre Vieja volcano forced Aena to close the airfield runways as a safety measure and the airlines canceled all connections with the island. The airport operators have taken care to keep the runways clean, but the incidence of the cloud of gases and ash from the volcanic plume and the wind regime have prevented the resumption of activity. The Special Plan for Protection against Volcanic Risk of the Canary Islands (Pevolca) foresees a change in winds that will be favorable to recover the operation of the airport after the island has spent a week isolated by air.