Nevado del Ruiz volcano (NRV), Columbia, is one of the most dangerous volcanoes in the world and caused the death of 25,000 people in 1985. Using a new algorithm for repeated tomography, we have found a prominent seismic anomaly with high values of the Vp/Vs ratio at depths of 2-5 km below the surface, which is associated with a shallow magma reservoir. The amplitude and shape of this anomaly changed during the current phase of unrest which began in 2010. We interpret these changes as due to the ascent of gas bubbles through magma and to degassing of the reservoir. In 2011-2014, most of this gas escaped through permeable roof rocks, feeding surface fumarole activity and leading to a gradual decrease of the Vp/Vs ratio in the reservoir. This trend was reversed in 2015-2016 due to replenishment of the reservoir by a new batch of volatile-rich magma likely to sustain further volcanic activity. It is argued that the recurring "breathing" of the shallow reservoir is the main cause of current eruptions at NRV.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5385870 | PMC |
| http://dx.doi.org/10.1038/srep46094 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
2q31 microdeletion syndrome with the velocardiofacial phenotype and review of the literature: a case report.
BMC Pediatr
October 2024
Congenital and rare disease center (CIACER), Universidad Icesi, Cali, Colombia.
Article Synopsis
- - The 2q31 deletion is linked to a specific set of features including developmental delays, short stature, distinct facial traits (like microcephaly and ear deformities), and limb defects, identified in 38 patients so far.
- - An 8-year-old girl with symptoms resembling velocardiofacial syndrome was diagnosed with a 2q31 microdeletion, confirmed through genetic testing that showed a non-continuous deletion between certain cytobands, along with treatment for her speech and swallowing difficulties.
- - This case is the first recorded instance of a complex deletion in the 2q31 regions, enhancing knowledge about the conditions linked to these genetic changes, and highlights the importance of advanced diagnostic methods to distinguish it
Novel risk loci for COVID-19 hospitalization among admixed American populations.
Elife
October 2024
CIBERER, ISCIII, Madrid, Spain.
Article Synopsis
- The study investigates the genetic factors linked to severe COVID-19, specifically focusing on hospitalized cases in admixed Americans.
- Researchers conducted the largest genome-wide association study (GWAS) for COVID-19 hospitalization in this population, identifying four significant genetic associations, including two novel loci found in Latin Americans.
- The findings highlight the importance of including diverse populations in genomic research, aiming to improve understanding of genetic risks associated with COVID-19 across different ethnic groups.
Geodetic monitoring of the recent activity and the dome forming eruption at Nevado del Ruiz (Colombia), 2010-2023.
Sci Rep
September 2024
Department of Earth Sciences, Sapienza - University of Rome, 00185, Rome, Italy.
Nevado del Ruiz (Colombia) is infamous for the catastrophic eruption of 1985 that destroyed the villages of Armero and Chinchiná. However, this was not the volcano's first destructive event; similar eruptions also occurred in 1595 and 1845. In 1985, the limited geodetic data available failed to provide a clear warning of the impending eruption.
View Article and Find Full Text PDFIdentification of copy-number variants in patients with overgrowth disorders.
Clin Genet
November 2024
CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, Madrid, Spain.
Overgrowth syndromes (OGS) comprise a heterogeneous group of disorders whose main characteristic is that the weight, height or the head circumference are above the 97th centile or 2-3 standard deviations above the mean for age, gender, and ethnic group. Several copy-number variants (CNVs) have been associated with the development of OGS, such as the 5q35 microdeletion or the duplication of the 15q26.1-qter, among many others.
View Article and Find Full Text PDFCarbon-phosphorus cycle models overestimate CO enrichment response in a mature forest.
Sci Adv
July 2024
Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith 2751, Australia.
Article Synopsis
- - The study examines the performance of phosphorus-enabled land surface models in predicting CO effects on ecosystem responses to climate change, using data from a long-term forest experiment.
- - Most models accurately predicted the direction and magnitude of CO effects on carbon sequestration but tended to overestimate plant carbon uptake and growth.
- - Key areas for improvement include photosynthesis scaling, plant nutrient balance, belowground carbon allocation, and their impact on plant-microbial interactions, suggesting models may overestimate the global carbon sink driven by CO.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!