The descent of the tremor of the La Palma volcano, the earthquakes and the sulfur breathe hope


1,443

Destroyed buildings

  • The Pevolca returned to report yesterday on the Cadastre data on the destroyed buildings. So far there are 1,443, which is 150 more than those contributed last Thursday.

The indicator that is most out of the normal registers is that of sulfur dioxide. The optical sensors collected last Tuesday that 9,600 tons had been emitted in the plume, a value that, as López pointed out, “is still very high” since it must be around 100 to start talking about the last phase of the eruption . Despite this, it provided another piece of information that leads to hope of a possible end in the medium-long term: “This decline is supported by the temporal evolution of the estimates collected by satellites, which also show a downward trend.” However, the figure collected before yesterday is up to five times less than that of Sunday, October 31, when 50,000 tons were exceeded.

Another parameter that is carefully followed to try to predict the stage of the volcano is the tremor, which on Tuesday afternoon suddenly had an “abrupt” descent, as described by the seismologist of the National Geographic Institute ( IGN) Itahiza Domínguez on her Twitter account. The director of the National Geophysical Observatory indicated in this regard that it is at the levels of last October 24, but, there is always a but, “it has to go down more” until it reaches the episode that occurred on September 27. Then the eruption stopped to everyone’s surprise for a few hours and then resumed its activity with virulence. “We are very far from those levels,” he outlined at the usual press conference in which the Pevolca scientific committee reports the latest news.

The Cadastre indicates that in Todoque another 127 homes were buried last Thursday


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And there was seismic activity, which during the last week continues with a downward trend after more than half a thousand tremors accumulated on October 24 and 25. Since then, this figure has been declining until registering a thousand earthquakes in the last seven days, with about 120 last Tuesday and yesterday, between 00.00 and 20.00 hours, 102 were reached. “They are good signs”, Carmen López again pointed out, who once again added a but to these positive data: «They have to reduce the magnitudes so high that we are having [ayer se detectó uno de 5 grados que se sintió en toda La Palma, La Gomera y Tenerife] and the frequencies of these earthquakes. In any case, the scientist stressed that “if you follow this path, we will go well.” Some statements that have been one of the best news that the palmeros have received during the last 46 days. However, scientists remain prudent because, as López notes in each value that he makes public, even sulfur dioxide, tremor and seismicity are still too high to glimpse a near end.

158

Hectares of banana trees

  • The banana is one of the sectors most affected by the volcano. In the first 44 days of the eruption, 158 hectares of banana trees, 59 of vineyards and 24 of avocado trees have been buried.

The positive news did not come only from the behavior that the Cumbre Vieja volcano is showing in recent days. They also occurred when reporting the progress of the different flows, which, according to the Pevolca technical director, Rubén Fernández, had barely advanced during the last 24 hours. The only news came from wash number 11, which had advanced 50 meters and then stopped. This meant another day of advantage for emergency resources, who fear that sooner or later this language will advance another 100 meters more to bury a section of the LP-211 highway (Todoque – Las Manchas) that will invalidate the Marta Road, which it is currently used uphill from Puerto Naos. This possibility would significantly complicate access to this tourist town in Los Llanos de Aridane. Fernández declared that traffic through this point is “restricted” for “security reasons” due to the proximity of the laundry. And he announced that they hope that in a period of one or two weeks they will finish the work to improve the narrow path that leaves the Valle Aridane Tennis Club, with a single lane, which until now was used in the downward direction and that would remain as the only route of access to Puerto Naos. “It will be able to exit and enter large tonnage vehicles, especially to provide assistance to farmers in Puertos Naos, La Bombilla and El Remo, and allow work in desalination plants,” explained the technical director of Pevolca.

The lava that threatens one of the two entrances to Puerto Naos stops after advancing 50 meters


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Air communications, on the other hand, improved yesterday afternoon with the arrival of the trade winds, which helped dissipate the ash column that affected the province of Santa Cruz de Tenerife. This did not prevent any flight from being operated at La Palma airport in the morning, which began to return to normal from 3:00 p.m. For its part, Tenerife North was operated again on Wednesday without incident after several cancellations and diversions were recorded in the second half of Tuesday due to the presence of volcanic sand. The forecast for today’s session, according to Rubén Fernández, is the presence of rains, which may be locally moderate, on the north and east faces of La Palma, with an increase in the height of the thermal inversion that will also allow a respite for the inhabitants of the Aridane Valley.

And it is that the plume will have the opportunity to grow in height again, unlike in recent days when the investment was in the 800 meters that served as a parapet. This, together with the large amount of ash that the volcano expelled, caused that during Monday and Tuesday high concentrations of particles smaller than 10 microns (PM10) were collected in Los Llanos. The air quality then became “extremely unfavorable”, with records of up to 250 micrometers, five times more than the 50 in which the air quality limit is marked as good. With the passing of the hours, the situation has not changed considerably since during the whole day yesterday sulfur dioxide showed a pattern of stability in about 200 micrometers, which the Ministry for the Ecological Transition and the Demographic Challenge (Miteco ) described as “very unfavorable”.

498

Sheltered

  • The evicted people who remain in hotels and health centers are 498, seven less than on Tuesday. 388 are in Fuencaliente, 67 in Los Llanos and 43 are dependent.

The Pevolca once again reported on the data from the Cadastre on the destruction of buildings, which collected the houses that were buried last Thursday in the Todoque area. Since then, the number of buildings for residential use increased by 127 to 1,176, agricultural buildings increased by 11 to 147, for industrial use 6 more and a total of 69, another 4 for leisure and hospitality up to 33, 13 for public use ( two more) and 15 rated as others (one more).

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