An earthquake of magnitude 3.9 (Richter), whose epicenter was located at sea, about 98 kilometers south-southwest of Faro, at 01:49 am (local time), was felt with maximum intensity III (modified Mercalli scale) in the Albufeira region, informed the Portuguese Institute of the Sea and the Atmosphere (IPMA).
If you also felt the earthquake, you can help IPMA, which wants to map the extent of the effects of the earthquakes felt, by filling out a short questionnaire, available here.
This earthquake, according to the information available so far, did not cause personal or material damage, adds the IPMA-
an earthquake of intensity III on the modified Mercalli scale is considered Weak. People who feel it report that it was «sfelt indoors», that «the hanging objects sway», the «vibration is similar to that caused by the passage of heavy vehicles», being «possible to estimate the duration but it cannot be recognized as an earthquake».
According to the Richter scale, earthquakes are classified according to their magnitude as micro (less than 2,0), very small (2,0-2,9), small (3,0-3,9), slight (4,0-4,9), moderate (5,0-5,9), strong (6,0-6,9), large (7,0-7,9), important (8,0-8,9 .9,0), exceptional (9,9-10) and extreme (when greater than XNUMX).
On the other hand, according to the IPMA, “the location of the epicenter of an earthquake is a complex physical and mathematical process that depends on the set of data, algorithms and models of propagation of seismic waves. Different agencies may produce slightly different results», explains the IPMA.
Likewise, «preliminary determinations are usually corrected later, by incorporating more information».
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