Departamento de Física

URI permanente para esta comunidadhttp://10.0.96.45:4000/handle/11056/14434

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Characterizing tsunami signals from the Hunga Tonga-Hunga-Ha’apai eruption and its effects on the Caribbean
(American Geophysical Union, 2022-12-13) Sostre-Cortés, Jelis; Vanacore, Elizabeth A.; von Hillebrandt-Andrade, Christa; Watlington, Roy A.; Joseph, Erouscilla P.; Dourado, Francisco; Colón Rodríguez, Benjamín; Fontaine, Fabrice J.; Chacón Barrantes, Silvia; Paris, Raphael; Robertson, Richard E.A.; Mercado, Aurelio; Gómez Ramos, Octavio; McNamara, Daniel E.; Soto, Stephanie; Clouard, Valerie; Brome, Alison; Aliaga, Bernardo; Kong, Laura S.L.; Deroussi, Sebastien
The Hunga Tonga Hunga Ha'apai eruption of January 15 2022, was a rare geological event, resulting in atmospheric pressure waves being recorded around the world. The event caused significant environmental consequences, including sea-level fluctuations in the Caribbean. The focus of this research is to analyze the tsunami and pressure waves generated in the Caribbean, by this volcanic eruption. These perturbations are uncommon and have not been seen in many occurrences, let alone with global implications. Modern instrumentation in the Caribbean including both barometers and sea-level stations provided a unique opportunity to observe and analyze this event. A comprehensive review of the observations recorded in the Caribbean and adjacent regions linking the barometric observations to sea level perturbations, including observations of the lead/lag of the sea level perturbations relative to the barometric pressure spikes and the frequency content of observable sea level perturbations is presented in this study. For instance, at several stations in Puerto Rico, 7 barometric spikes were observed of which the first 3 generated a significant sea level observation. Notably in Puerto Rico the second barometric spike lagged the sea level anomaly by ~80 minutes. Factors complicating observations or non-observations such as land-water interactions as well as interference from factors such as a strong cold front will also be discussed. The goal of this study, which will integrate observations from across the Caribbean, is to better understand the nature of this unique event and how it was observed in the region. As such, this research can offer insight into the factors that may influence volcanic tsunamis, which is invaluable for developing tsunami warning and response protocols.
Integrating Volcanic Sources into the Tsunami Warning System for the Caribbean and Adjacent Regions
(Sociedad Sismológica Americana (SSA), 2023-04-17) Von Hillebrandt-Andrade, Christa; Clouard, Valerie; Sostre-Cortés, Jelis; Vanacore, Elizabeth; Aliaga, Bernardo; Angove, Michael; Arcos, Nicolas; Chacon-Barrantes, Silvia; Dourado, Francisco; Gómez Ramos, Octavio; Joseph, Erouscilla; Kong, Laura; Lynch, Lloyd; McCreery, Charles; McNamara, Daniel; Paris, Raphael; Rodríguez, Lizzette; Watlington, Roy
One of the goals of the UN Decade Ocean Science Tsunami Programme is that by 2030 actionable notifications are issued for all tsunamis, irrespective of source. In the Caribbean, 14% of all probable and definite historical tsunamis are associated with volcanoes (NOAA National Centers for Environmental Information). A tsunami triggered by the the Hunga Tonga Hunga Ha'apai eruption of January 15, 2022, was the most recent to be observed in the Caribbean and adjacent regions. This event as well as the eruption and related tsunami at Anak Krakatau (2018) and the eruptions of Kick’em Jenny (2015, 2017, 2018, 2020), Saint Vincent (2020) and La Palma (2021) reinforced the need for a tsunami warning system that can handle such non-seismic events. The UNESCO/IOC Intergovernmental Coordination Group for the Tsunami and Other Coastal Hazards Warning System for the Caribbean and Adjacent Regions was established in 2005. It coordinates tsunami warning and mitigation activities, including the issuance of tsunami bulletins for its 48 Member States and territories. Following the eruptions of Kick‘em Jenny in 2015, it established the Volcanic Sources Task Team to address the challenge of these nonseismic sources. A warning system, as the one operated by Tsunami Service Providers, (TSP, ie, the Pacific Tsunami Warning Center), is classically based on seismic and sea level data. Determined earthquake locations and magnitudes trigger initial action from the TSP, while sea level data confirm tsunami generation and help refine forecasts. For volcano sources, the task team has proposed that volcano observatories send messages to the TSP’s alerting them to potential and ongoing eruptions. These messages, vis a vis seismic information, would be the basis for TSP’s to issue initial standardized bulletins and products. The 2019 and 2023 CARIBE WAVE exercises included scenarios to test products and procedures for volcanic sources. However, more actions are required, including advancing the modeling of volcano scenarios and forecasting of triggered tsunamis, as well as expanding observations, including seismic and geodetic.
Ocean Decade Project: Integrating Coastal Hazard Early Warning Systems for the Tropical Americas and Caribbean(iCHEWS)
(IUGG, 2023-07-15) Von Hillebrandt-Andrade, Christa; Torres, Jair; Bayouth-Garcia, Desiree; Cabrera, Edgard; Wilson, Doug; Innis, Lorna; Pinardi, Nadia; Brome, Alison; Chacon-Barrantes, Silvia; Blythe-Mallett, Azra; Nibbs, Farah; Smail, Emily; Aliaga, Bernardo
In June 2021, UNESCO IOC approved the Ocean Decade Tsunami Programme (ODTP) in response to the call to action by the UN Ocean Decade of Ocean Science for Sustainable Development (2021-2030). The ODTP has two overarching goals: (1) develop the warning system’s capability to issue actionable and timely forecasts for tsunamis from all identified sources for all communities at risk, and (2) 100% of communities at risk are prepared and resilient to tsunamis by 2030. In 2022, a Scientific Committee for ODTP was established to develop a 10-Year Research, Development and Implementation Plan to reach these two objectives. This presentation will focus on three of the four areas of the plan: -Enhance tsunami risk assessments and research on technologies, so the countries know their expected vulnerability and threat (tsunami characteristics), and can identify and prioritize the at-risk communities. -Ensure all National Tsunami Warning Centres have access to data, tools and communication platforms, protocols and training to timely and effectively warn coastal and maritime communities threatened by tsunamis and other coastal hazards that are integrated into a multi-hazard framework. -Emphasize the importance of building tsunami resilient communities that are prepared and ready to respond through the UNESCO IOC Tsunami Ready Recognition Programme. Tsunami Ready is a global, voluntary community-based effort approved in 2022. It has 12 indicators categorized into Assessment, Preparedness and Response, and thus addresses all of the three aforementioned areas of the Plan. The objectives will be achieved through involvement of stakeholders at all levels and attention on capacity development and governance.

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Examinando Departamento de Física por Autor "Aliaga, Bernardo"