Emergenza naturale

Dodici giorni di fuoco

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Il vulcano Cumbre Vieja di La Palma, nelle isole Canarie, è inarrestabile. Dopo dodici giorni di eruzione il fuoco continua a soffocare l'isola e provoca gas tossici quando entra in contatto con il mare. Venerdì 1 ottobre, altre due bocche del vulcano si sono aperte con altra lava più liquida che avanza verso Los Llanos de Aridane, il comune più popolato dell'isola.

Eruzione del vulcano Cumbre Vieja nelle Isole Canarie (Spagna). Foto: AP
A man speaks on his phone while standing on a street covered with ash from a volcano in Santa Cruz de la Palma on the Canary island of La Palma, Spain, Monday Sept. 27, 2021. A Spanish island volcano that has buried more than 500 buildings and displaced over 6,000 people since last week lessened its activity on Monday, although scientists warned that it was too early to declare the eruption phase finished. (AP Photo/Daniel Roca)
Lava flows from a volcano on the Canary island of La Palma, Spain on Monday Sept. 27, 2021. A Spanish island volcano that has buried more than 500 buildings and displaced over 6,000 people since last week lessened its activity on Monday, although scientists warned that it was too early to declare the eruption phase finished and authorities ordered residents to stay indoors to avoid the unhealthy fumes from lava meeting sea waters. (AP Photo/Daniel Roca)
Military Emergency Unit personal take gas reading measurements near a volcano on the Canary island of La Palma, Spain, in the early hours of Tuesday Sept. 28, 2021. Lava flowing from an erupting volcano on the Spanish island of La Palma has picked up pace on its way to the sea. Officials say it is now within about 800 meters (875 yards) of the shoreline. When the molten rock eventually meets the sea water it could trigger explosions and toxic gas. (Luismi Ortiz/UME, via AP)
Lava from a volcano reaches the sea on the Canary island of La Palma, Spain, Wednesday Sept. 29, 2021. Lava from a volcano that erupted Sept. 19 on Spain's Canary Islands has finally reached the Atlantic Ocean after wiping out hundreds of homes and forcing the evacuation of thousands of residents. (AP Photo/Saul Santos)
Lava from a volcano reaches the sea on the Canary island of La Palma, Spain, Wednesday, Sept. 29, 2021. Lava from a volcano that erupted Sept. 19 on Spain's Canary Islands has finally reached the Atlantic Ocean after wiping out hundreds of homes and forcing the evacuation of thousands of residents. (AP Photo/Saul Santos)
A cloud of gases are seen as lava from a volcano enters the sea on the Canary island of La Palma, Spain on Thursday Sept. 30, 2021. The surface of Spain's La Palma island continues growing as lava from a volcano keeps flowing into the Atlantic Ocean. Authorities were on alert because changing wind direction could sweep towards the island the plumes of toxic gases emerging from the sea. Sept. 30, 2021. (AP Photo/Daniel Roca)
A cloud of gases are seen as lava from a volcano enters the sea on the Canary island of La Palma, Spain on Thursday Sept. 30, 2021. The surface of Spain's La Palma island continues growing as lava from a volcano keeps flowing into the Atlantic Ocean. Authorities were on alert because changing wind direction could sweep towards the island the plumes of toxic gases emerging from the sea. Sept. 30, 2021. (AP Photo/Daniel Roca)
In this photo provided by the Spanish government and taken from a plane carrying Spain's Prime Minister Pedro Sanchez, a volcano erupts on the island of La Palma in the Canaries, Spain, Sunday Sept. 19, 2021. Lava continues to flow slowly from a volcano that erupted in Spain’s Canary Islands off northwest Africa. The head of the islands' regional government said Monday he expects no injuries to people in the area after some 5,000 were evacuated.(Borja Puig de la Bellacasa/Spanish Government via AP)
A house is covered in debris after an eruption of a volcano near El Paso on the island of La Palma in the Canaries, Spain, Tuesday, Sept. 21, 2021. A dormant volcano on a small Spanish island in the Atlantic Ocean erupted on Sunday, forcing the evacuation of thousands of people. Huge plumes of black-and-white smoke shot out from a volcanic ridge where scientists had been monitoring the accumulation of molten lava below the surface. (AP Photo/Emilio Morenatti)
Lava from a volcano eruption flows on the island of La Palma in the Canaries, Spain, Thursday, Sept. 23, 2021. A volcano on a small Spanish island in the Atlantic Ocean erupted on Sunday, forcing the evacuation of thousands of people. Experts say the volcanic eruption and its aftermath on a Spanish island could last for up to 84 days. (AP Photo/Emilio Morenatti)
Lava from a volcano eruption flows on the island of La Palma in the Canaries, Spain, Thursday, Sept. 23, 2021. A volcano on a small Spanish island in the Atlantic Ocean erupted on Sunday, forcing the evacuation of thousands of people. Experts say the volcanic eruption and its aftermath on a Spanish island could last for up to 84 days. (AP Photo/Emilio Morenatti, Pool)
A police officer orders journalists to leave the area during a media tour near the volcano on the island of La Palma in the Canaries, Spain, Wednesday, Sept. 22, 2021. A volcano on a small Spanish island in the Atlantic Ocean erupted on Sunday, forcing the evacuation of thousands of people. Experts say the volcanic eruption and its aftermath on a Spanish island could last for up to 84 days. The Canary Island Volcanology Institute said Wednesday it based its calculation on the length of previous eruptions on the archipelago. (AP Photo/Emilio Morenatti)
Lava from a volcano eruption flows on the island of La Palma in the Canaries, Spain, Thursday, Sept. 23, 2021. A volcano on a small Spanish island in the Atlantic Ocean erupted on Sunday, forcing the evacuation of thousands of people. Experts say the volcanic eruption and its aftermath on a Spanish island could last for up to 84 days. (AP Photo/Emilio Morenatti)
Residents look from a hill as lava continues to flow from an erupted volcano, on the island of La Palma in the Canaries, Spain, Friday, Sept. 24, 2021. A volcano in Spain’s Canary Islands continues to produce explosions and spew out lava, five days after it erupted. Two rivers of lava continue to slide slowly down the hillside of La Palma on Friday. (AP Photo/Emilio Morenatti)
Vehicles are covered by ashes from a volcano eruption at the island of La Palma in the Canaries, Spain, Friday, Sept. 24, 2021. A volcano on a small Spanish island in the Atlantic Ocean erupted on Sunday, forcing the evacuation of thousands of people. Experts say the volcanic eruption and its aftermath on a Spanish island could last for up to 84 days. (AP Photo/Emilio Morenatti)
Two people walk as lava spews from a volcano on the Canary island of La Palma, Spain in the early hours of Saturday Sept. 25, 2021. A volcano in Spain's Canary Islands is keeping nerves on edge several days since it erupted, producing loud explosions, a huge ash cloud and cracking open a new fissure that spewed out more fiery molten rock. The prompt evacuations are credited with helping avoid casualties but scientists say the lava flows could last for weeks or months. (AP Photo/Daniel Roca)
Lava flows from a volcano on the Canary island of La Palma, Spain in the early hours of Sunday Sept. 26, 2021. A volcano in Spain's Canary Islands is keeping nerves on edge several days since it erupted, producing loud explosions, a huge ash cloud and cracking open a new fissure that spewed out more fiery molten rock. (AP Photo/Daniel Roca)
Lava flows from a volcano on the Canary island of La Palma, Spain on Sunday Sept. 26, 2021. A massive cloud of ash prevented flights in and out of the Spanish island of La Palma on Sunday as molten rock continued to be flung high into the air from an erupting volcano. (AP Photo/Daniel Roca)
Lava from a volcano reaches the sea on the Canary island of La Palma, Spain, Wednesday, Sept. 29, 2021. Lava from a volcano that erupted Sept. 19 on Spain's Canary Islands has finally reached the Atlantic Ocean after wiping out hundreds of homes and forcing the evacuation of thousands of residents. (AP Photo/Saul Santos)

Lo scorso 19 settembre, il vulcano Cumbre Vieja sull’isola canaria di La Palma, in Spagna, ha eruttato causando l’evacuazione di migliaia di residenti e la distruzione di interi villaggi.
Dieci giorni dopo, martedì 28 settembre, la lava non solo non si era spenta, ma è riuscita a raggiungere l’Oceano Atlantico e ad occupare 19 ettari, passando sopra le piantagioni di banane, il sostentamento agricolo della regione, e causando un’enorme esplosione.
Di conseguenza, la temperatura dell’acqua è aumentata e le emissioni di anidride carbonica, acido carbonico e acido solforico hanno aumentato la sua acidità. C’è stata una diminuzione dell’ossigeno e un incremento delle concentrazioni di ferro, rame, cadmio e mercurio.
Secondo gli esperti dell’Istituto Oceanografico Spagnolo (IOE), questo squilibrio naturale causa una drastica alterazione dell’ecosistema marino, inquinamento, fuga di specie e mortalità. Sul lato positivo, l’effetto è transitorio e l’ambiente dovrebbe rigenerarsi entro due anni. Foto: AP

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