An earthquake measuring 2.5 on the Richter scale was recorded at 19:21 this Tuesday in the Aroca district of Aveiro district, the Portuguese Institute of the Sea and Atmosphere (IPMA) said.
The quake, whose epicenter is located about ten kilometers east of Aroca, was recorded at stations on the mainland’s seismic network, IPMA said in a statement.
“Information confirming that the earthquake was felt has not been received,” the IPMA added.
According to the institute, “the location of the epicenter of an earthquake is a complex physical and mathematical process that depends on the data set, algorithms and models of seismic wave propagation.”
“Different departments may give somewhat different results. Similarly, preliminary definitions are usually corrected later by combining additional information. In all cases, always follow the instructions of the civil protection services,” the IPMA says in a note.
Early this morning at 1:49 a.m., an earthquake of magnitude 3.9 on the Richter scale struck, with its epicenter located 98 kilometers south-southwest of Faro.
According to the institute, this shock “with maximum intensity III (modified Mercalli scale) was felt in the Albufeira area.”
Another earthquake of magnitude 3.7 on the Richter scale was recorded on Tuesday morning in the Algarve at 11:17, the epicenter of which was about 50 kilometers south of Olhao, in Faro district, advanced IPMA.
“This earthquake, according to the information available at the moment, did not cause personal or property damage and was felt with maximum intensity III / IV (modified Mercalli scale) in the municipalities of Faro, Loulé and Olhão,” IPMA said.
On Tuesday at 15:47 an earthquake measuring 2.6 on the Richter scale was recorded about eight kilometers west of Évora, according to IPMA.
This earthquake, according to the information available to the IPMA, “caused no personal or material damage and was felt with maximum intensity IV (modified Mercalli scale) in the municipality of Évora.”
“In the municipality of Montemor o Novo (Évora), this was felt even with less intensity,” the statement said.
When intensity III occurs, which is considered weak, a jolt is felt inside the home and hanging objects sway, feeling “a vibration similar to that which occurs when heavy vehicles pass,” according to IPMA on its website.
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 (40-4.9), 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 10).
Author: Portuguese
Source: CM Jornal
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