In a statement, the IPMA says that the earthquake had its epicentre about 10 kilometres south-southeast of Évora and was recorded at 1:22 am at the stations of the Continental Seismic Network.

The tremor "did not cause personal or material damage and was felt with a maximum intensity of III (modified Mercalli scale) in the municipality of Évora".

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), light (4.0-4.9), moderate (5.0-5.9), strong (6.0-6.9), large (7.0-7.9), major (8.0-8.9), exceptional (9.0-9.9) and extreme (when greater than 10).

The Modified Mercalli scale measures the "degrees of intensity and their respective description".

With an intensity of III, considered weak, the tremor is felt inside the house and hanging objects sway, with a "vibration similar to that caused by the passage of heavy vehicles" being perceived, as revealed by IPMA on its website.