Over 1,000 small earthquakes hit Portuguese volcanic island in less than 48 hours
March 22, 2022, 8:57 am

Over 1,000 small earthquakes hit Portuguese volcanic island in less than 48 hours

Island of Sao Jorge in Portugal (File photo: Pixabay)

The Arab News reported, citing Reuters that around 1,100 small earthquakes have rattled one of Portugal's mid-Atlantic volcanic islands in less than 48 hours, prompting authorities to activate an emergency plan as experts assess what they have described as a "seismic crisis".

Rui Marques, head of the Azores archipelago's seismo-volcanic surveillance centre CIVISA, told Reuters on Monday the earthquakes, with a magnitude ranging from 1.9 to 3.3, had been recorded on the island of Sao Jorge since Saturday afternoon.

He said most of the earthquakes, which have caused no damage so far, were reported along the island's volcanic fissure of Manadas, which last erupted in 1808.

The report said that Sao Jorge, one of nine islands which make up the Azores, is home to around 8,400 people and is part of the archipelago's central group, which includes the popular tourist destinations of Faial and Pico, which are also volcanic.

Around 1,100 small earthquakes have rattled one of Portugal's mid-Atlantic volcanic islands in less than 48 hours (File photo: Pixabay)

Describing it as a preventive measure, Luis Silveira, the mayor of the municipality of Velas, where much of Sao Jorge's population lives, signed a document on Monday to activate an emergency plan due to the earthquakes.

The sudden increase in seismic activity is reminiscent of the earthquake swarms detected prior to the eruption of the Cumbre Vieja volcano on Spain's La Palma island last year, some 1,400 kilometres (870 miles) southeast of the Azores.

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Over 85 days, that eruption destroyed thousands of properties and crops.

However, CIVISA has yet to establish what the series of tremors might signify.

Marques told Lusa news agency: "It is still not possible to know the behaviour pattern of this seismic crisis."

CIVISA has sent teams to the ground to set up two additional seismic monitoring stations on the island and to measure soil gases, an indicator of volcanic activity.

In a statement on Sunday, the regional Civil Protection authority said it had already contacted local mayors and fire units, and asked them to "remain vigilant" and help the people of Sao Jorge if needed.

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Marques told Lusa that it urged people to stay calm, stay informed and follow the recommendations of officials. Only 63 of the 1,100 earthquakes registered so far have been felt by the population.

Marques told Antena 1 radio station: "We must be a bit concerned," adding that "We should not raise an alarm but we will be attentive to the evolution of the situation."

Source: arabnews

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