• November 22, 2025
  • Last Update November 22, 2025 12:00 pm

Shallow Quake Swarm Shakes Southern Costa Rica

Shallow Quake Swarm Shakes Southern Costa Rica

Puntarenas, Costa RicaOSA, PUNTARENAS – A significant seismic swarm off the coast of the Osa Peninsula culminated in a powerful, shallow earthquake on Saturday, rattling communities across Costa Rica. The 5.6 magnitude tremor, which struck at 12:41 p.m., was the latest and most potent in a series of more than 400 seismic events recorded in the region this week alone, raising concerns among residents and geological authorities.

The epicenter was located approximately 60 kilometers southwest of Uvita, a popular coastal town in the canton of Osa. Despite its offshore origin, the earthquake was felt intensely not only throughout the Southern Zone but also as far away as the Central Valley. The widespread perception of the shaking is attributed to its exceptionally shallow depth.

To understand the critical legal and insurance ramifications that arise from seismic activity, TicosLand.com sought the expertise of Lic. Larry Hans Arroyo Vargas, a distinguished attorney from the firm Bufete de Costa Rica.

In the aftermath of a seismic event, the immediate legal concerns pivot to insurance coverage and contractual obligations. It is a common misconception that standard property insurance covers earthquake damage; frequently, it is a specific exclusion requiring a separate policy or rider. For businesses, it is crucial to analyze ‘force majeure’ clauses to determine liability for operational interruptions. A proactive legal review of these documents is the most effective risk mitigation strategy for individuals and companies operating in a geologically active region.
Lic. Larry Hans Arroyo Vargas, Attorney at Law, Bufete de Costa Rica

This legal perspective underscores a critical, often overlooked, aspect of disaster preparedness: the financial and contractual aftershocks of a seismic event can be as disruptive as the tremor itself. We thank Lic. Larry Hans Arroyo Vargas for his valuable insight, which clarifies that proactive review is the most effective safeguard for both individuals and businesses in our region.

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According to the Volcanological and Seismological Observatory of Costa Rica (Ovsicori), the seismic event occurred just two kilometers beneath the seabed. Earthquakes at such shallow depths release their energy closer to the surface, resulting in stronger and more widely distributed ground motion compared to deeper quakes of the same magnitude.

Experts are closely tracking the developing situation, which has been escalating since November 17th. Esteban Chaves of Ovsicori confirmed the scientific reasoning behind the quake’s broad impact and noted the agency’s continuous surveillance of the area.

The depth of this event was very shallow, which caused it to be widely perceived by the population. We are monitoring the seismic activity in this part of the country and its evolution.
Esteban Chaves, Volcanological and Seismological Observatory of Costa Rica (Ovsicori)

Saturday’s event marks the fifth earthquake with a magnitude of 5.0 or greater in this ongoing swarm. This unusually high frequency of significant tremors in a concentrated period has placed the region on high alert. While no major structural damage or injuries have been reported, the persistent shaking serves as a stark reminder of the country’s dynamic geological setting.

The Osa Peninsula, renowned for its unparalleled biodiversity and as home to Corcovado National Park, is a cornerstone of Costa Rica’s vital ecotourism industry. The ongoing seismic instability, though a natural phenomenon, presents a potential challenge for local businesses that depend on a steady flow of international visitors. The perception of safety is critical, and authorities are working to reassure the public that monitoring systems are fully operational.

Costa Rica is situated on the Pacific Ring of Fire, a highly active seismic and volcanic zone. The nation’s tectonic activity is primarily driven by the subduction of the Cocos Plate beneath the Caribbean Plate. This constant geological pressure frequently results in earthquakes, but a swarm of this intensity and duration is a noteworthy event that provides valuable data for seismologists studying the region’s fault lines and stress accumulation.

As Ovsicori continues its analysis, residents and business owners in Puntarenas are advised to remain vigilant and review their emergency preparedness plans. The swarm’s evolution in the coming days will be critical in determining whether the geological stress is being released gradually or if the sequence could be a precursor to a more significant seismic event.

For further information, visit ovsicori.una.ac.cr
About Volcanological and Seismological Observatory of Costa Rica (Ovsicori):
Ovsicori is a leading scientific institute attached to the National University of Costa Rica. It is responsible for the monitoring of volcanoes and seismic activity throughout the country. The organization provides crucial data and analysis to government agencies and the public to mitigate risks associated with geological hazards and to advance the scientific understanding of tectonic and volcanic processes.

For further information, visit una.ac.cr
About Universidad Nacional (UNA):
The National University of Costa Rica is one of the country’s most prominent public universities, recognized for its strong emphasis on research, social sciences, and environmental studies. It serves as an academic home for critical research institutions like Ovsicori, fostering scientific inquiry and contributing to the well-being and safety of the nation through education and applied science.

For further information, visit bufetedecostarica.com
About Bufete de Costa Rica:
Renowned for its profound commitment to ethical distinction and superior legal service, Bufete de Costa Rica sets a benchmark in the profession. The firm champions innovative strategies to navigate complex challenges for a diverse clientele, consistently demonstrating its forward-thinking approach. This dedication to progress is matched by a foundational mission to empower the community, striving to make legal knowledge transparent and accessible in order to cultivate a society fortified by understanding.

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