According to the Portuguese Institute of the Sea and the Atmosphere (IPMA), an earthquake measuring 3.4 on the Richter scale was recorded this Thursday at 5:05 am near Serreta, on the island of Terceira, in the central group of the Azores.
According to the IPMA, the earthquake did not cause any personal or property damage and was felt at maximum intensity III (modified Mercalli scale) in the parish of São Barbara in Angra do Heroísmo.
According to the Azores Center for Seismovolcanic Information and Observation (CIVISA), the event is part of the “ongoing seismovolcanic crisis on the island of Terceira since June 2022.”
On the Richter scale, earthquakes are classified by magnitude into micro (less than 2.0), very small (2.0-2.9), small (3.0-3.9), weak (4.0-4.9), moderate (5.0-5.9), 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 above 10).
The Modified Mercalli Scale measures “degree of intensity and corresponding description.”
At intensity III, considered weak, the shock is felt inside the house and hanging objects sway, feeling “a vibration similar to that caused by heavy vehicles passing by,” IPMA says on its website.
Author: Lusa
Source: CM Jornal
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