La Palma volcanic eruption of 2021

Article

October 19, 2021

The 2021 La Palma volcanic eruption begins on Sunday, September 19, 2021 at 2:10 p.m. local time, in the municipality of El Paso, near the village of Las Manchas on the island of La Palma in the Canary Islands, Spain . This is the first eruption on the island since the eruption of Teneguía in October 1971 and the first in the Canary Islands since the eruption of El Hierro in 2011 ,,,.

Previous

From October 7, 2017 to June 25, 2021, up to eight earthquakes with similar characteristics, called earthquake swarms, are recorded in the southern part of La Palma. A scientific study published in January 2021, which uses, among other things, a new technique for interpreting the radar observations available from different satellites, reveals certain anomalies in the Aridane valley (es) which would suggest a possible "reactivation" of the basement from 2009 or 2010, while acknowledging that it is accepted that almost 80% of situations with such anomalies did not result in subsequent volcanic eruptions. Saturday, September 11, 2021 in the morning, a new seismic swarm of low intensity begins in the south of the island. Until Sunday, September 12, 31 seismic movements were recorded, with magnitudes between 0.8 and 2 on the mbLg scale. On Monday, September 13, 1,500 seismic movements were recorded in the Cumbre Vieja area, in the municipalities of Fuencaliente, Villa de Mazo and El Paso, resulting in the activation by the government of the Canaries of the yellow alert (level of alert 2 on a scale of 4) of the Special Plan for Civil Protection and Emergency Alert Linked to Volcanic Risk (Pevolca). Sunday, September 19, 327 earthquakes were recorded, with an earthquake of 3.8 mbLg at 11:16 local time, widely felt on the island and with a depth of 2 km. Shortly thereafter, an earthquake of 4.2 on the Richter scale occurs. Since the start of the seismic activity, it has been observed that the deformation of the island, due to the pressure of the magma on the earth's crust, raises the possible eruption zone by about 15 cm. Despite this situation, it was decided not to increase the precautionary measures and the island cabildo of La Palma only decided to evacuate 40 people with reduced mobility and some of the cattle present in the area.

Procedure

September 19

The volcano erupted on Sunday, September 19 at 2:10 pm local time, in the area known as Cabeza de Vaca ("Cow's Head") in the town of El Paso. The eruption initially comprises two fissures 200 m apart and eight eruptive mouths. Authorities, such as the Civil Guard, which has deployed more than 120 people on the ground, estimate the total number of evacuees could exceed 10,000 in the coming hours, as lava flows towards the Atlantic Ocean. . Several roads are also closed to traffic as a precaution.

September 20

Over the next sixteen hours three lava flows occur, reaching a height of six meters. More than five thousand people were evacuated from the neighborhoods closest to the lava flows, including hundreds of tourists. At the end of the day, a ninth eruptive mouth was counted in the Tacande area. A-type lava flows are not very fluid; however, as they progressed towards the ocean at a speed of about 700 m / h, they caused extensive material damage, including the total destruction of buildings, roads and facilities near the area of ​​the first eruption. Location of the lava flow on September 20 at 5:50 p.m. UTC

September 21

On Tuesday, September 21 at 2 p.m., the main lava flow reached the town of TodoqueTodoque in

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