An earthquake measuring 1.9 on the Richter scale was felt this Thursday on the island of Terceira, the Azores Center for Seismic Volcanic Information and Observation (CIVISA) reported.
According to CIVISA, the earthquake was recorded at 1:45 a.m. local time (2:45 a.m. in Lisbon) and had an epicenter about three kilometers northeast of Serreta, Terceira island.
“According to the information currently available, the earthquake was felt with a maximum intensity of III (modified Mercalli scale) in Serrete (municipality of Angra do Heroísmo),” CIVISA said in a statement.
This event “is part of the ongoing seismic-volcanic 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), strong (6.0-6.9), large (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 “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 the passage of heavy vehicles,” the Portuguese Institute of the Sea and the Atmosphere (IPMA) said on its website. .
Author: Lusa
Source: CM Jornal
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