Azores records 4,000 earthquakes

Faial is the centre of earthquake activity

Earthquake map of the area west of Faial in the AzoresThanks as usual to Peter for a link to the Acoriano Oriental website in the Azores, which currently has the headline announcing that more than 4,000 earthquakes have now been recorded west of the island of Faial, with magnitude between 1.0 and 4.7 on the Richter scale, from November 5, 2019, until yesterday, Monday, 13 January 2020.

According to a statement from the Portuguese Institute of Sea and Atmosphere, the events of greatest magnitude occurred on November 5th at 6:22 am and on December 18th at 8:05 am, with magnitudes of 4.6 and 4.7 on the Richter scale, respectively.

Of all the events recorded, 35 were felt with maximum intensities, ranging from II / III to IV / V on the Modified Mercalli scale, and no damage was reported.

IPMA also notes that the location of the Azores archipelago – in the junction zone of the North American, Eurasian and Nubian lithospheric plates – explains “intense seismic activity”.

“The seismicity of the archipelago is generally organized into seismic sequences, either as replicas of a major event or as swarms or seizures of small to moderate magnitude, the strongest being felt by the population,” the statement said, adding that “The region west of the island of Faial is one of the seismic zones where periods of intense seismic activity recur”.

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