Intense seismic activity: fifth swarm in Tenerife near Teide in three weeks

The island of Tenerife, in Ilhas Canárias, recorded its fifth seismic swarm in less than three weeks, with more than a thousand hybrid events detected in the western region of Cañadas and Teide. Esses tremores, ocorridos a profundidades entre 8 e 10 quilômetros, não foram perceptíveis pela população, mas elevam o total de eventos para mais de 6 mil desde o reinício da atividade vulcânica na área.

The director of Instituto Geográfico Nacional (IGN), Itahiza Domínguez, highlighted that the probability of a volcanic eruption in the short or medium term remains low, after meeting with local authorities. Seismic activity, concentrated in pulses of low magnitude, is linked to fluid movements in the hydrothermal system, with no evidence of imminent magmatic rise.

Specialists from Instituto Volcanológico of Canarias (Involcan) monitor the situation continuously, using seismic networks to record these hybrid events. Authorities insist on the preparation inherent to volcanic islands, reinforcing contingency plans without alarming the local population or tourists.

Intensified monitoring in the Teide region

IGN has expanded its sensor network by Tenerife since the first swarm detected in February, allowing for more accurate detection of events. Esses tremors, although numerous, maintain very low amplitudes, which makes accurate counting difficult in times of seismic clustering.

The meeting with Cabildo of Tenerife and the 31 municipalities on the island served to align response protocols, ensuring that information is disseminated clearly. Domínguez explained that swarms are common in active volcanic areas, but the current pattern of recurrence requires continued vigilance.

Recent history of seismic activity

Since October 2016, Tenerife has recorded similar episodes, with swarms in June 2019, June and July 2022, November 2024, August 2025 and now multiples in February 2026.

The February 12th swarm marked the beginning of the current sequence, followed by others on the 16th and 17th, and now the fifth on February 23rd. Dados Preliminaries show that the average depth remains stable, between 7 and 12 kilometers, suggesting stability in the system.

Experts compare this activity to that of other island volcanoes, such as those on Havaí, where swarms precede monitoring phases without necessarily evolving into eruptions. Integrated analysis of seismic and geochemical data helps predict trends, although volcanic unpredictability requires constant caution.

Prevention measures adopted by authorities

The Ilhas Canárias government activated enhanced surveillance protocols, including evacuation simulations in areas close to Teide. Essas actions, planned to occur periodically, aim to prepare local communities for hypothetical scenarios, maintaining normality in daily activities.

Tourists visiting Parque Nacional from Teide receive up-to-date guidance on safe routes and meeting points in case of alerts. Authorities emphasize that the island is equipped with resilient infrastructure, the result of decades of experience in managing volcanic risks.

Involcan collaborates with international institutions to exchange data, enriching the understanding of activity in Tenerife. Essa global network allows comparisons with other volcanic hotspots, improving predictive models without generating unfounded speculation.

Technical characteristics of detected events

Hybrid seismic events feature low-frequency signals typically associated with deeply moving fluids. Registros indicate that the fifth swarm began around 2 pm local time on February 23, extending for hours with intermittent pulses.

The difficulty in quantifying clustered events leads to conservative estimates, with IGN reporting around a thousand in the latest episode. Sensores installed on Vilaflor and Guía of Isora capture these signals, contributing to a database that spans more than a decade of monitoring.

Complementary geochemical studies analyze gas emissions, such as carbon dioxide, to detect variations that could indicate changes in the magma. Até at the moment, levels remain within historical standards, reinforcing the low risk assessment.

Seismological analyzes reveal patterns similar to those of 1980, when swarms occurred without major consequences. Essa historical continuity provides basis for projections, although each episode requires independent assessment.

Impact on everyday life in Tenerife

Residents of areas close to Teide report unchanged routine, with tourism continuing to flow normally to the national park. Hotéis and tour guides incorporate information about seismic activity into their briefings, promoting awareness without interruptions to visits.

Local companies, such as agriculture and winemaking in the southern region, monitor possible indirect effects, but do not record significant impacts. The island’s economy, dependent on tourism, benefits from the transparency of the authorities, which avoid unnecessary alarmism.

International scientific collaboration

Institutions such as the USGS, in the Estados Unidos, share expertise in volcanic monitoring with Canary teams, improving detection techniques. Essa partnership includes the use of satellites to measure deformations in the ground, complementing terrestrial data.

European researchers, through União Europeia programs, fund studies on island volcanoes, with Tenerife serving as a model case. Conferências regular virtual sessions discuss recent swarms, integrating multidisciplinary perspectives for broader understanding.

Preparation for future scenarios

Contingency plans include mapped evacuation routes and command centers equipped with the latest technology. Exercícios simulations, like the one planned for the previous September, test the coordinated response between government agencies and emergency services.

Public education about volcanic risks is prioritized in schools and communities, fostering a culture of resilience. Materiais distributed information explains the difference between seismic swarms and eruptions, reducing misunderstandings.

Real-time data integration via mobile apps allows residents to access updates directly, strengthening communication. Essa proactive approach ensures that the island remains prepared for any developments in Teide activity.

Details about depth and location

The western zone of Cañadas and Teide concentrates most of the events, with depths varying slightly between 7 and 10 kilometers. Mapas Detailed seismic data shows specific clusters, helping to identify spatial patterns.

Comparisons with past swarms reveal a geographic recurrence, suggesting persistent underground structures. Geólogos use 3D models to visualize these dynamics, improving predictions based on historical data.

Evolution of activity throughout the month

The first swarm of February occurred on the 12th and 13th, with hundreds of hybrid events. The second, on the 16th and 17th, added more than 300 tremors, raising the scientific alert.

The third, on February 18, joined the sequence, maintaining similar characteristics. Agora, with the fifth on February 23, the total exceeds 6 thousand, highlighting a phase of monitored intensification.

Experts note that unusual signals, such as a 90-minute signal in previous days, add layers to the analysis without changing the risk assessment.

Recommendations for visitors and residents

Authorities recommend following official channels for updates, avoiding unverified sources. Aplicativos seismic monitoring systems provide real-time alerts, facilitating individual preparation.

For tourists, alternative routes in the national park guarantee safety during visits. Guias Trainees provide context about local geology, transforming the experience into an educational one.