Increased seismic activity in La Cocha generates green alert in Nariño.

Since August 15, the La Cocha lagoon, located in the department of Nariño, has experienced a significant increase in seismic activity, prompting the Colombian Geological Service (SGC) to declare a green alert in the region. This phenomenon has captured the attention of both scientists and the local community, who are concerned about the possibility that this activity could trigger more severe events. The reported seismic activity is associated with the fracturing of rocks in the Earth's crust. According to the SGC, a total of 439 earthquakes have been recorded in this sector of the Guamuez - Sibundoy volcanic field during the evaluated period. Of these, seven events had a magnitude equal to or greater than 2.0, with the most notable occurring on August 17, 2024, which reached a magnitude of 3.4 and was felt in nearby towns such as Santiago and Pasto. Jhon Makario Londoño, Technical Director of Geo-hazards at the SGC, emphasized that the volcanoes in the area have particular characteristics that differentiate them from other Colombian volcanoes, such as Nevado del Ruiz or Galeras. These volcanoes tend to experience unique eruptions, leading to the formation of new volcanoes in the area, unlike others where magma emerges recurrently. This geological peculiarity adds a level of complexity to the analysis of seismic activity in the region. The SGC has also mentioned that the presence of geological faults in the area could play an important role in the interaction with volcanic activity. This information is crucial as it allows scientists to assess not only the possibility of eruptions but also how these faults may influence the behavior of the volcanoes. It is important to note that although seismicity has been a recorded phenomenon in the region since 2011, the number of events recorded in recent days is unusually high. This increase has led the scientific community to pay special attention to the area in an effort to better understand the present geological dynamics. Historically, the Guamuez - Sibundoy volcanic field has experienced earthquakes of considerable magnitude, with the most prominent being in 1834, which reached an estimated magnitude of 6.7. This historical precedent raises concerns in the community, which fears a possible return to risk situations. The SGC has urged the population to stay informed through its official channels and to follow the relevant safety recommendations. Constant monitoring of seismic activity is essential to mitigate risks and prepare the population for potential eventualities. The green alert implies that, while no imminent event has occurred, one must remain vigilant for any changes in conditions. This includes monitoring the behavior of the earthquakes and volcanic activity, as well as establishing emergency protocols in case the situation worsens. The community of Nariño, known for its rich biodiversity and natural beauty, now faces a new challenge. The inhabitants of the area must unite in preparation and prevention efforts, relying on the information and assistance that the SGC and other authorities can provide. In conclusion, the increase in seismic activity at La Cocha lagoon serves as a reminder of the geological dynamics that characterize Colombia. Collaboration between the scientific community and the local population will be crucial to addressing this phenomenon safely and effectively. The task is not only to monitor but also to educate and prepare citizens to be ready for any eventuality that may arise in the future.