scholarly journals Fluid geochemistry and seismic activityin the period 1998-2002 at Turrialba Volcano (Costa Rica)

2009 ◽  
Vol 47 (4) ◽  
Author(s):  
F. Tassi ◽  
O. Vaselli ◽  
V. Barboza ◽  
E. Fernandez ◽  
E. Duarte
Keyword(s):  
Costa Rica ◽  
Ground Deformation ◽  
Geochemical Data ◽  
Physical Parameters ◽  
Fumarolic Activity ◽  
Volcanic System ◽  
Magmatic Source ◽  
The Status ◽  
Central Crater ◽  
Turrialba Volcano

Turrialba Volcano, located in Central-Southern Costa Rica, has been characterized, since the last period of eruptive activity in 1884-1886, by a weak and discontinuous fumarolic activity in the western area of its summit. During the 1998-2002 period, fumaroles discharging from central and West craters were collected for chemical analyses of major and trace gas compounds, 13C/12C in CO2 and 18O/16O and D/H (in one fumarolic condensate), isotopic ratios. Geophysical measurements (seismic activity and ground deformation), monitored in the same period, were compared to geochemical data to define the status of the volcanic system. Chemical and isotopic characteristics of fumaroles of Turrialba Volcano seem to be related to interaction processes between a magmatic source and a shallower hydrothermal aquifer. Since February 1997, seismicity at Turrialba Volcano gradually increased, while since August 2001 new fumaroles start to discharge from a new fracture system located in the area between central and West craters. Since September 2001, strong compositional changes of gas discharges have been recorded at central crater. These occurrences are possibly due to variations in the permeability of the conduit system feeding the fumaroles. Heat pulse episodes from a magmatic source have possibly caused the increase of vapour pressure at depth and, consequently, favoured the uprising of the magmatic fluids toward the surface. The observed evolution of chemical and physical parameters suggests that to forecast a possible renewal of the volcanic activity in the near future a full program of both geochemical and geophysical surveillance must be provided at Turrialba Volcano.

scholarly journals Turmoil at Turrialba Volcano (Costa Rica): Degassing and eruptive processes inferred from high-frequency gas monitoring

2016 ◽  
Vol 121 (8) ◽  
pp. 5761-5775 ◽  
Author(s):  
J. Maarten de Moor ◽  
A. Aiuppa ◽  
G. Avard ◽  
H. Wehrmann ◽  
N. Dunbar ◽  
...  
Keyword(s):  
Costa Rica ◽  
High Frequency ◽  
Gas Monitoring ◽  
Turrialba Volcano

Evolution of fluid geochemistry at the Turrialba volcano (Costa Rica) from 1998 to 2008

2010 ◽  
Vol 72 (4) ◽  
pp. 397-410 ◽  
Author(s):  
O. Vaselli ◽  
Franco Tassi ◽  
E. Duarte ◽  
E. Fernandez ◽  
R. J. Poreda ◽  
...  
Keyword(s):  
Costa Rica ◽  
Fluid Geochemistry ◽  
Turrialba Volcano

scholarly journals Assessing Suitable Habitats for Treefrog Species after Previous Declines in Costa Rica

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 577
Author(s):  
Héctor Zumbado-Ulate ◽  
Catherine L. Searle ◽  
Gerardo Chaves ◽  
Víctor Acosta-Chaves ◽  
Alex Shepack ◽  
...  
Keyword(s):  
Costa Rica ◽  
Sympatric Species ◽  
Costa Rican ◽  
Suitable Habitat ◽  
Minimum Convex Polygon ◽  
Amphibian Species ◽  
Environmental Threats ◽  
The Status ◽  
Suitable Habitats ◽  
Iucn Assessment

Treefrogs represent 22% of amphibian species in Costa Rica, but gaps in the knowledge about this group of amphibians can impede conservation efforts. In this study, we first updated the status of Costa Rican treefrogs and found that a total of 38% of treefrog species are threatened according to the most recent IUCN assessment in 2019. Additionally, 21% of Costa Rican treefrog species have a high vulnerability to extinction according to environmental vulnerability scores. Then, we predicted the historical climatic suitability of eight target species that we expected to have exhibited changes in their ranges in the last 20 years. We assessed the location of new occurrence records since 2000 to identify recovery, range expansion, or previously underestimated ranges due to methodological limitations. We also estimated the area of each species’ suitable habitat with two metrics: extent of suitable habitat (ESH) and area of minimum convex polygon (AMCP). Six declined species exhibited recovery (i.e., new occurrences across historical range after 2000), with the widest recovery found in Agalychnis annae. We also found that Isthmohyla pseudopuma appears to have spread after the decline of sympatric species and that the range of I. sukia was originally underestimated due to inadequate detection. We found that the ESH was 32–49% smaller than the AMCP for species that are slowly recovering; however, the ESH is similar or greater than the AMCP for species that are recovering in most of their ranges, as well as rare species with widespread ranges. Results of this work can be used to evaluate the risk of environmental threats and prioritize regions for conservation purposes.

scholarly journals Study of the Coastal Vulnerability in ​​Indramayu Regency, Indonesia

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Waluyo Waluyo ◽  
Amelia Fitrina Devi ◽  
Taslim Arifin
Keyword(s):  
Coastal Area ◽  
Gis Mapping ◽  
Coastal Protection ◽  
Physical Parameters ◽  
Coastal Vulnerability ◽  
Physical Vulnerability ◽  
Coastal Vulnerability Assessment ◽  
Physical Infrastructure ◽  
The Status ◽  
Social Demographic

Coastal vulnerability is a condition of a coastal community or society that leads to or causes an inability to face the threat of danger. The level of vulnerability can be viewed from the physical (infrastructure), social, demographic, and economic vulnerabilities. Physical vulnerability (infrastructure) describes a physical condition (infrastructure) that is prone to certain hazard factors. The coastal vulnerability areas can also be interpreted as a condition where there is an increase in the process of damage in the coastal area which is caused by various factors such as human activities and factors from the nature. This research aims to determine the level of coastal vulnerability in Indramayu coastal Regency with a Coastal Vulnerability Assessment (CVA) analysis approach and a Geographic Information System (GIS). Mapping the status of the vulnerability level of the Indramayu coastal area using the CVA method where the index range generated from the calculation of the four physical parameters mentioned above is between 2.887 – 3.651 or are in moderate vulnerability. A higher vulnerability value is found in several locations such as Juntikedokan and Benda villages. It is necessary to develop coastal protection in this area to prevent damage to the coastal area.

scholarly journals EARTH AS PRIMORDIALLY HYDROGEN-RICH PLANET: HYPOTHESIS AND REALITY

2021 ◽  
Vol 12 (3) ◽  
pp. 645-651
Author(s):  
А. V. Pospeev
Keyword(s):  
Major Part ◽  
Geochemical Data ◽  
Physical Parameters ◽  
Average Volume ◽  
Energy Potential ◽  
Earth’S Mantle ◽  
The Earth ◽  
Proper Consideration ◽  
Hydrogen Energetics

The article is focused on the role of natural hydrogen in the Earth geodynamics and energy potential. With a proper consideration of the physical parameters of the Earth’s core and mantle, we discuss the aspects of the Hydridic Earth (or Primordially Hydrogen-Rich Planet) theory, which is currently used as a fundamental hypothesis in modern projects aimed at hydrogen energetics.A probability of finding natural hydrogen deposits in sedimentary traps is estimated. It is shown that the volume of deep degassing of hydrogen can be calculated from various cosmological, petrophysical and geochemical data, and an average volume is two orders of magnitude less than the amount predicted by the Hydridic Earth hypothesis. This hypothesis gives grounds to conclude that the major part of Earth’s mantle is a metal sphere; however, this conclusion is not supported by the geological and geophysical data.

Unsteady magma discharge during the “El Retiro” subplinian eruption (Turrialba volcano, Costa Rica): Insights from textural and petrological analyses

2019 ◽  
Vol 371 ◽  
pp. 101-115 ◽  
Author(s):  
Andrea Di Piazza ◽  
Alessandro Vona ◽  
Silvio Mollo ◽  
Gianfilippo De Astis ◽  
Gerardo J. Soto ◽  
...  
Keyword(s):  
Costa Rica ◽  
Magma Discharge ◽  
Turrialba Volcano

scholarly journals Carbon isotope systematics of Turrialba volcano, Costa Rica, using a portable cavity ring-down spectrometer

2017 ◽  
Vol 18 (7) ◽  
pp. 2769-2784 ◽  
Author(s):  
K. S. Malowany ◽  
J. Stix ◽  
J. M. de Moor ◽  
K. Chu ◽  
G. Lacrampe-Couloume ◽  
...  
Keyword(s):  
Costa Rica ◽  
Carbon Isotope ◽  
Turrialba Volcano ◽  
Isotope Systematics ◽  
Cavity Ring Down

scholarly journals Approach to Verify the Status of Measles, Rubella, and Congenital Rubella Syndrome Elimination in Costa Rica

2011 ◽  
Vol 204 (suppl_2) ◽  
pp. S690-S697 ◽  
Author(s):  
Ana Morice ◽  
Maria L. Avila-Aguero ◽  
Daniel Salas-Peraza ◽  
Alejandra Soriano ◽  
Carlos Castillo-Solórzano
Keyword(s):  
Costa Rica ◽  
Congenital Rubella Syndrome ◽  
Congenital Rubella ◽  
The Status
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