Volcanic warning on La Palma Island in the Canary Islands after nearly a thousand earthquakes were detected around La Kumbrevieha, the last eruption 50 years ago
- Seismic activity and magma displacement surge registered
- The strongest quake of the current earthquake swarm had a magnitude of 3.4
- Kumbrevieha is a dormant volcanic ridge that erupted twice in the 20th century.
La Palma, Canary Islands, is at increased risk of volcanic eruptions after 1,000 earthquakes in the last five days.
Experts have noticed a surge in seismic activity and magma displacement beneath volcanic ridges. a Kumbrevieja is one of La Palma’s popular tourist hotspots.
According to the Involcan Volcanology Institute, the strongest quake in recent earthquake swarms was a magnitude of 3.4.
Experts have noticed a surge in seismic activity and magma displacement beneath the ridges of Lakumbrevieha volcano in La Palma.
Earthquake swarms are a series of seismic events that occur in one place in a relatively short period of time.
“We cannot rule out the intensification of seismic activity types over the next few days,” the institute said.
A Spanish government office in the Atlantic archipelago said the situation “may change rapidly in the short term,” but emphasized that “there is no clear evidence that an eruption is imminent.” bottom.
The ridge covers the southern two-thirds of the small island, and the yellow warning warning affects four municipalities, including Los Janos de Aridan, El Paso, and Hermazo.
Kumbrevieha erupted twice in the 20th century on the ridge of a dormant volcano south of La Palma. It spewed lava first in 1949 and then in 1971 for three weeks.
A 2001 study article argues that changes in the eruptive activity of Kumbrevieha volcano and the destruction of the volcano formed during the 1949 eruption may signal a huge ridge collapse.
Authors Stephen N. Ward and Simon Day estimated that such a collapse could cause a tsunami across the North Atlantic Ocean, with serious implications for countries far away from North America.
Authorities raised alert levels from green to yellow on Tuesday in certain areas around the volcano. This is the second of four levels.
This means that civil protection authorities must notify the public to “take precautions prior to the possibility of a volcanic eruption,” says the Pevolka Emergency Program.
According to Involcan, all quakes were shallow, with a “small amount” of new magma flowing into the reservoir beneath the volcano, resulting in “significant ground deformation” that amounted to 11 million cubic meters.
“Undoubtedly, the current earthquake swarm represents a significant change in the activity of the Kumbrevieha volcano and is associated with the process of magma intrusion beneath La Palma,” he said.
In 2018, a swarm of 270 mini-earthquakes was recorded in the Canary Islands for 10 days, raising concerns that Mount Teide on Tenerife might erupt.
The largest of these reached a magnitude of 3.2 on a Richter scale about 22 miles from Puerto Lars in the port of Las Palmas de Gran Canaria.
However, the eruption did not occur, and scientists calmed fear by saying that the shaking was part of the island’s normal seismic activity.
Professor Mike Burton, chairman of the University of Manchester’s Volcanology, told MailOnline at the time: Southeast of Tenerife that matches this.
Prior to the eruption on Tenerife or other Canary Islands, there are clear precursors to seismic activity, gas and ground deformation. These are not such signals.
How can researchers predict a volcanic eruption?
According to Eric Dunham, an associate professor at Stanford University’s School of Global Energy and Environmental Sciences, “Volcanoes are complex and there is currently no universally applicable means for predicting eruptions. Probably never. “
However, there are indicators of increased volcanic activity that researchers can use to predict volcanic eruptions.
Researchers can track indicators such as:
- Volcanic infrasound: As the lava lake rises at the crater of Open Bent volcano, which is a sign of a possible eruption, the pitch or frequency of the sound produced by the magma tends to increase.
- Seismic activity: As magma moves through the volcanic “plumbing system” prior to the eruption, seismic activity in the form of small earthquakes and tremors almost always increases.
- Gas emissions: When the magma approaches the surface of the earth and the pressure drops, the gas escapes. Sulfur dioxide is one of the main components of volcanic gas, and increasing its amount indicates that the amount of magma near the surface of the volcano increases.
- Ground deformation: Changes in the surface of a volcano (deformation of a volcano) can be caused by the movement of magma, gas, or other fluid (usually water) underground, or by movement within the crust due to movement along a fault. Rows that are sexual, appear as swelling, sinking, or cracking. The expansion of the volcanic can indicates that magma has accumulated near the surface.
Source: US Geological Survey
Volcanic warning on La Palma Island, Canary Islands after nearly a thousand earthquakes have been detected
SourceVolcanic warning on La Palma Island, Canary Islands after nearly a thousand earthquakes have been detected