A moderate earthquake struck the Portuguese capital, Lisbon, on Monday, February 17, 2025, at 1:24 PM local time (2:24 PM CET). The earthquake, measuring 4.8 on the Richter scale, was centered approximately 3 kilometers south of Charneca da Caparica, a municipality in the district of Setúbal, with a depth of 10 kilometers at coordinates (38.5878, -9.1875) 3.
Impact and Feelings
The tremor was felt with maximum intensity in the municipalities of Almada and Sesimbra, causing moments of tension and alert among residents. Although the earthquake was initially reported to have a magnitude of 4.7, it was later corrected to 4.8 by multiple seismological centers, including the United States Geological Survey (USGS) and the Euro-Mediterranean Seismological Center 3.
Emergency Response and Monitoring
The Portuguese Institute for the Sea and Atmosphere (IPMA) confirmed the earthquake and is continuing to monitor the situation for possible aftershocks. There have been no reports of casualties or significant structural damage. IPMA emphasized the importance of citizens remaining alert and following safety guidelines, as aftershocks can occur in the coming days 1.
Historical Context and Seismic Activity
Lisbon and its surrounding areas have a significant history of earthquakes. The most catastrophic seismic event occurred in 1755, when an earthquake estimated between 8.5 and 9.0 magnitude destroyed much of the city, resulting in the deaths of approximately 60,000 people. Another significant tremor occurred in 1969, measuring 7.9 on the Richter scale, causing considerable damage and reinforcing the need for continuous monitoring 1.
Infrastructure and Preparedness
Portugal has made significant investments in infrastructure to minimize the impact of earthquakes. Reinforcing historic buildings and implementing stricter construction regulations are some of the strategies adopted to reduce risks. Regular training and drills help ensure that citizens know how to act in an emergency, which is crucial for mitigating the effects of seismic events 1.
Public Safety Guidelines
During an earthquake, it is essential to follow safety measures to minimize risks. Some of the main recommendations include seeking shelter under tables or sturdy furniture, staying away from windows, mirrors, and objects that may fall, and avoiding unstable structures. After the tremor, residents should check for structural damage to homes and buildings, avoid using elevators, and follow official information and instructions from authorities 1.
Future Preparedness
Seismic events like the one that occurred this morning highlight the importance of continuous monitoring and preparedness for possible future tremors. Although the 4.8-magnitude earthquake did not cause damage, its occurrence serves as a reminder that Lisbon must continue improving its strategies for mitigating natural disasters. The possibility of aftershocks underscores the need for vigilance and adherence to safety guidelines 1.
