An earthquake measuring 3.1 on the Richter scale hit the island of São Jorge in the Azores on Tuesday, according to the Center for Information and Seismic Volcanic Observation of the Azores (CIVISA).
According to CIVISA, the earthquake was recorded at 18:14 local time (19:14 in Lisbon) and had an epicenter about seven kilometers northeast (NE) of Rosais, on the island of São Jorge.
“According to the currently available information, an earthquake with a maximum intensity of IV (on the modified Mercalli scale) was felt in the parishes of Rosais and Velas (Municipality of Velas),” the report says.
CIVISA indicated that the event is part of “an ongoing seismic volcanic crisis on São Jorge Island since March 2022.”
Between 00:00 and 22:00 on Tuesday, approximately 22 events were recorded, one of which was felt.
Seismic volcanic activity recorded on Sao Jorge Island since March 19, 2022 “remains above normal.”
“To date, about 57,579 events of small magnitude and tectonic origin have been registered,” he stressed.
The most powerful earthquake of this crisis occurred on March 29, 2022 at 21:56 local time (22:56 Lisbon), had an epicenter about two kilometers south-southwest (SSW) of Velas and had a magnitude of 3.8 Richter scale.
“To date, about 351 earthquakes have been identified and felt by the population,” he said.
On the Richter scale, earthquakes are classified by magnitude into micro (less than 2.0), very weak (2.0-2.9), small (3.0-3.9), weak (4.0-4.9), moderate (5.0-5.9). , strong (6.0–6.9), major (7.0–7.9), important (8.0–8.9), exceptional (9.0–9.9) and extreme (when more than 10 ).
The modified Mercalli scale measures “degrees of intensity and corresponding description”.
At intensity IV, which is considered “moderate”, “parked cars shake”, “windows, doors and dishes shake” and “glasses and dishes rattle or rattle”, and walls or wooden structures may creak, according to the Institute of the Sea. and Atmosphere (IPMA) on their website.
Author: Portuguese
Source: CM Jornal
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