Earthquakes of magnitude 2.0 and 1.9 on the Richter scale felt in Terceira
Two earthquakes with magnitude 2.0 and 1.9 on the Richter scale were felt today in Terceira at 4:49 pm and 4:50 pm local time (5:49 pm and 5:50 pm in Lisbon), after another tremor recorded at dawn on that Azorean island, the authorities reported.
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País Açores
"According to the information available so far, the earthquakes were felt with maximum intensity III (Modified Mercalli scale) in Doze Ribeiras and Serreta (municipality of Angra do Heroísmo)", CIVISA said in a statement.
At 00:37 local time (01:37 in Lisbon) today, a quake with a magnitude of 1.8 on the Richter scale and an epicenter about four kilometers east of Serreta had already been registered.
The earthquake was felt with maximum intensity III (Modified Mercalli scale) in Serreta.
The three events are part of "the ongoing seismovolcanic crisis on Terceira Island since June 2022".
According to the Richter scale, earthquakes are classified according to their magnitude as micro (less than 2.0), very small (2.0-2.9), small (3.0-3.9), light (4.0-4.9), moderate (5.0-5.9), strong (6.0-6.9), large (7.0-7.9), important (8.0-8.9), exceptional (9.0-9.9) and extreme (when greater than 10).
The Modified Mercalli scale measures the "degrees of intensity and their respective description".
With an intensity of III, considered weak, the quake is felt indoors and hanging objects swing, with a "vibration similar to that caused by the passage of heavy vehicles", reveals the Portuguese Institute of the Sea and Atmosphere (IPMA) on its website.
Read Also: 1.8 magnitude earthquake on the Richter scale felt on Terceira Island (Portuguese version)
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