An earthquake measuring 2.1 on the Richter scale was felt on the island of Terceira

An earthquake measuring 2.1 on the Richter scale was felt today on the island of Terceira in the Azores, the Azores Center for Seismic Volcanic Information and Observation (CIVISA) reported.

According to CIVISA, the earthquake was recorded at 18:54 local time (19:54 in Lisbon) and had an epicenter about four kilometers east of Serreta, Terceira island.

“According to the information currently available, the earthquake was felt with a maximum intensity of III (modified Mercalli scale) in the parishes of Serreta and Dose Ribeiras (municipality of Angra do Heroísmo, Terceira Island),” CIVISA said in a statement.

This Wednesday at 13:35 local time (14:35 in Lisbon), another earthquake was recorded on the island of Terceira, the epicenter of which was approximately four kilometers south-southeast of Raminho.

According to CIVISA, the earthquake was felt with maximum intensity III/IV (modified Mercalli scale) in the parishes of Doze Ribeiras and Altares (municipality of Angra do Heroísmo, Terceira Island).

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 “vibrations similar to those caused by the passage of heavy vehicles,” the Institute of the Sea and the Atmosphere (IPMA) said on its website.

At intensity IV, considered moderate, “parked cars shake,” “windows, doors, and dishes shake,” “glass and dishes rattle or clank,” and walls or wood structures may creak, the source said.