Chile continues to experience regular seismic activity as tectonic shifts rattle various regions across the country, according to reports published by El Comercio Perú.
Seismic Activity Along the Northern Tectonic Plates
The constant movement stems from Chile’s location along the convergent boundary shared by the Nazca and South American tectonic plates, as detailed by La Tercera. While many of these shifts go completely unnoticed by the general public, monitoring centers track every vibration to maintain public safety.
Among the notable recent events tracked by the Centro Sismológico Nacional (CSN) of the University of Chile, a 4.1-magnitude earthquake struck at 07:21 hours on November 10, located 62 kilometers southwest of Mina Collahuasi at a depth of 99 kilometers, La Tercera reported.
Distinguishing Earthquake Magnitude from Physical Intensity
Seismological agencies emphasize a clear scientific distinction between the size of a quake and its actual physical effects on the ground. Magnitude measures the total elastic energy released during the rupture, yielding a single fixed value for every event.
According to the CSN, a sismo, temblor, or earthquake is the process of generating elastic waves and their subsequent propagation through the interior of the Earth, which arrive at the surface to produce movement and vibration of the ground.
In Chile, the term earthquake is used for a seismic event that generates structural damage—meaning it is reported with an intensity of grade VII or higher on the Modified Mercalli Scale.
Intensity, however, gauges the specific disruption felt by people, animals, and infrastructure. In Chile, officials rely on the Modified Mercalli scale (NCh3 of.61), which spans twelve roman numerals to classify local severity based on local geology, distance from the epicenter, and structural engineering.
Intensity depends on the size and force of the sismo, epicenter distance, local geology, nature of the ground, and type of constructions, and typically decreases as epicenter distance increases.
Senapred Provides Safety Guidelines for Residents During Tremors
The Servicio Nacional de Prevención y Respuesta ante Desastres (Senapred) maintains ongoing safety guidelines for residents encountering active tremors. Recommendations include securing shelter beneath heavy furniture, cutting off utility lines when possible, and avoiding overhead electrical cables during evacuations.
Additional advice covers staying in place during a mass event while protecting the head and neck with the arms and following security personnel instructions, as well as reducing speed and stopping after exiting a tunnel, bridge, or highway.
Authorities confirmed that those specific offshore characteristics did not meet the criteria necessary to generate a tsunami along the nation’s coastline, according to BioBioChile.
Preliminarily, the epicenter was located 12 kilometers southeast of Pisagua at a depth of 63 kilometers, while official CSN parameters recorded the magnitude 5.1 event at 08:58 hours (specifically at 08:58:31 local time, latitude -19.65, longitude -70.06) with a depth of 63.98 kilometers (or 64 kilometers) and an epicenter 17 kilometers (or 17.14 kilometers) east of Pisagua. The event was also felt in the Arica y Parinacota Region.
