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462 results for “volcano”
FIGURE 2. Astyris axicostata n in New species of the genus Astyris (Gastropoda: Neogastropoda: Buccinoidea Columbellidae) from the vicinity of hydrothermal vents of the Piip Volcano southwestern Bering Sea
FIGURE 2. Astyris axicostata n. sp. (A–I) A–D. Holotype, SL 7.3 mm (A–C—dried shell, D—wet shell with body seen through transparency). E. Paratype 1, SL 7.4 mm. F–G. Paratype 2, SL 7.0 mm. H–I. Paratype 3, juvenile with intact protoconch, SL 3.0 mm. J. Astyris cf. rosacea (Gould, 1840), SL 12.1 mm. A–G—at the same scale, H–I—enlarged, J—reduced.
FIGURE 1 in New species of the genus Astyris (Gastropoda: Neogastropoda: Buccinoidea Columbellidae) from the vicinity of hydrothermal vents of the Piip Volcano southwestern Bering Sea
FIGURE 1. Phylogenetic reconstruction using the COI gene (658 bp) showing Astyris axicostata n. sp. forming the clade with Astyris thermophila and A. rosacea nested within Columbellidae. Node values indicate Bayesian posterior probability and Maximal Likelihood bootstrap values, those lower than 0.8 and 80 are omitted.
Seismic structure beneath the Avacha and Koryaksky volcanoes in Kamchatka based on the data of permanent and temporary networks
<p>This file contains the files to reproduce the results presented in the article: <strong>Seismic structure beneath the Avacha and Koryaksky volcanoes in Kamchatka based on the data of permanent and temporary networks </strong>by Kitsura E., Koulakov I., Jakovlev A., Abkadyrov I., Bushenkova N., Chebrov D., Izbekov P., and Qaysi S.I., submitted to <em>Journal of Geophysical Research, Solid Earth</em>.</p> <p>This file includes:</p> <p>1. The full folder with the LOTOS code for the passive-source seismic tomography (Koulakov, 2009, BSSA). </p> <p>2. Folder with the dataset including arrival times of the P and S waves from local seismicity in the area of the Avacha group of volcanoes.</p> <p>3. README_AVA__KOR.pdf file with the description of the workflow on how to reproduce the tomography models based on experimental and synthetic data presented in the article. </p> <p>Koulakov, I., 2009, LOTOS code for local earthquake tomographic inversion: Benchmarks for testing tomographic algorithms: Bulletin of the Seismological Society of America, v. 99, p. 194–214, https://doi.org/10.1785/0120080013.</p>
Geochemical data for: Intense overpressurization at basaltic open-conduit volcanoes as inferred by geochemical signals: The case of the Mt. Etna December 2018 eruption
<p>The reported dataset is annexed to the article "Intense overpressurization at basaltic open-conduit volcanoes as inferred by geochemical signals: the case of the Mt Etna December 2018 eruption". It consists of five types of parameters: soil CO<sub>2</sub> flux from Mt Etna flanks, CO<sub>2</sub>/SO<sub>2</sub> molar ratio of the volcano plume, SO<sub>2</sub> and HCl fluxes by volcano plume, and He isotope ratio in some peripheral gas emissions, all of them recorded in the period 2017–2019. The data come from continuous monitoring networks installed on Mt Etna and from discrete samplings carried out at specific sites, all the monitoring facilities being supported by the INGV-Civil Defence joint surveillance program.</p>
Data and program codes to reproduce the results of seismic tomography for the Augustine Volcano (Alaska)
<p>This file contains the files to reproduce the results presented in the article: by Ivan Koulakov, Saleh Ismail Quasi, and Pavel Izbekov (2023). Structure of shallow magma sources beneath Augustine Volcano (Alaska) inferred from local earthquake tomography, <em>Journal of Geophysical Research, Solid Earth</em>.</p> <p>This file includes:</p> <p>1. The full folder with the LOTOS code for the passive-source seismic tomography (Koulakov, 2009, BSSA). </p> <p>2. Folder with the dataset including arrival times of the P and S waves from local seismicity in the area of the Augustine Volcano in Alaska.</p> <p>3. README_AUGUSTINE.PDF file with the description of the workflow on how to reproduce the tomography models based on experimental and synthetic data presented in the article. </p> <p>Koulakov, I., 2009, LOTOS code for local earthquake tomographic inversion: Benchmarks for testing tomographic algorithms: Bulletin of the Seismological Society of America, v. 99, p. 194–214, https://doi.org/10.1785/0120080013.</p> <p> </p> <p> </p>
Datasets, scripts and Jupyter Notebook for "Two distinct magma storage regions at Ambrym volcano detected by satellite geodesy", Geophysical Research Letters
<p>This repository includes scripts and files necessary to create Figure 1 (<strong>S1.zip </strong>and <strong>plot_TS_Ambrym_2019_2022.py</strong>) in "Two distinct magma storage regions at Ambrym volcano detected by satellite geodesy", <em>Geophysical Research Letters</em>. We also include the Jupyter Notebook used to run the EnKF data assimilation (<strong>enkf_notebook.zip) </strong>and produce Figures 2 and 3. The Jupyter Notebook and files used to produce Figure 4b,c can be found on <a href="http://github.com/tshreve/jupyterNBs/">GitHub</a>.</p> <p>This version corrects a bug in the code used to plot the cross-sections in Figure 3 with <strong>enkf_notebook.zip</strong>.</p>
SHARAD reflectors in the Tharsis volcano province
<p>Supporting Material includes SHARAD radargrams containing the reflectors in the TVP, Mars.</p>
FIGURE 5 in A new Hygrochroma Herrich-Schäffer (Geometridae: Ennominae) from Mexico City named by its residents after an ancient volcano
FIGURE 5. Male and female genitalia of other Hygrochroma species present in Mexico. 5a, male genitalia of H. hyalopuncta (IGOR23-48); 5b, male genitalia of H. bubona (IGOR23-51); 5c, male genitalia of H. nondina (IGOR23-47); 5d, female genitalia of H. nondina (IGOR23-32).
FIGURE 1 in A new Hygrochroma Herrich-Schäffer (Geometridae: Ennominae) from Mexico City named by its residents after an ancient volcano
FIGURE 1. Push-up posture typical of some species in Hygrochroma and Patalene. 1a. Hygrochroma bubona (source inaturalist.org, observation by heinerziegler); 1b. female Patalene aenetusaria (Walker) (source inaturalist.org, observation by coletoobservador).
FIGURE 3 in A new Hygrochroma Herrich-Schäffer (Geometridae: Ennominae) from Mexico City named by its residents after an ancient volcano
FIGURE 3. Female and male genitalia of Hygrochroma xitle. 3a, female genitalia with arrow pointing at the antrum; 3b, lateral view of female sterigma and papillae anales (arrow pointing at lamella antevaginalis); 3c, male genitalia in dorsal view; 3d, medial extension of gnathos and furca (both pointed with arrows); 3e, lateral view of valvae and uncus; 3f. dorsolateral view of aedeagus with arrows pointing at digitate posterior extension and cornuti.
Density and characteristics of tree cavities inside and outside Volcanoes National Park, Rwanda
<p>Tree cavities, formed by animal excavation or processes of fungal decay and mechanical damage, may provide nesting, roosting, or resting opportunities to many invertebrate and vertebrate species. Although cavity availability has been linked to patterns of biodiversity and ecosystem functioning elsewhere, there have been few such studies in the Afrotropics. Here, we present a baseline survey of cavity availability inside the high elevation (<span>2,200</span>–<span>3,714 </span>m) Afromontane forest ecosystems of Volcanoes National Park (VNP), Rwanda. We aimed to provide such reference data in the form of summary statistics on cavity density and characteristics in a collection of 400 m<sup>2</sup> plots that together cover 8.8 ha inside and 0.68 ha outside VNP. We also explored the relative importance of fungal decay vs. excavators in the formation of cavities, tested for the relative role of standing dead trees and living trees as cavity substrates, considered differences in diameter and height between cavity-bearing trees and trees without cavities, determined the orientation of cavity entrances, and tested whether cavity density varies across elevation. We found 109 cavities in 52 cavity-bearing trees (dominated by <em>Hagenia</em> <em>abyssinica</em>) inside VNP, for a density of 12.4 cavities and 5.9 cavity-bearing trees per hectare, and none outside the park. More cavities were decay-formed (n = 90) than excavated (n = 19) and though most cavities were found in living trees (n = 44) the number of cavities in dead trees (n = 8) was high relative to dead tree substrate availability. We also found that cavity-bearing trees were larger than those without cavities, that excavated cavities were predominantly oriented towards the southeast and decay-formed cavities to the northeast, and that cavity density peaked near ~3,000 m. Our results show that large and dead trees of particular species are important cavity substrates that need to be given attention in conservation and management as is clearly illustrated by the lack of cavities in the highly managed Eucalyptus stands outside VNP.</p>
Dung counts large mammals Volcanoes NP, Rwanda, 2008 and 2021
<p class="MsoNormal">It is unclear whether the remarkable recovery of mountain gorillas (<em>Gorilla beringei) </em>in the Virunga Mountains, East Africa, that followed decades of intensive conservation efforts is indicative of positive trends in abundance and distribution of other large mammals (meso and megaherbivores). Positive population trends are particularly relevant for globally threatened elephants Loxodonta sp., as conservation and research efforts have predominantly focused on populations that range in lowland savanna ecosystems rather than the smaller but ecologically and genetically unique populations found in Virungas' montane ecosystems. We used marked pellet group counts in dung clearance plots to determine the density/abundance and distribution of three meso (buffalo, black-fronted duiker, bushbuck) and one mega (elephant) herbivores in Volcanoes National Park (VNP; covering part of the Virunga Mountains), Rwanda, in July–September 2008 and 2021. We estimated that elephants and duiker populations saw a minor increase between 2008 and 2021 while densities of buffalo and bushbuck increased substantially over the course of the past decade. Accompanying, we found no evidence of substantial distributional shifts for elephants but observed increases in densities of the other species in the southwestern parts of VNP. Overall, density estimates for all species were much higher in both 2008 and 2021 than in a previous survey in 2004, which suggests that meso and megaherbivores have largely recovered from a steep decline in numbers towards the end of the 20th century, possibly benefitting from the same protection efforts that benefitted mountain gorillas.</p>
Detecting Transient Deformation at the Active Volcano Ol Doinyo Lengai in Tanzania with the TZVOLCANO Network: Supplementary software, data, model files
<p><span>These are supplementary data, code, and model files associated with the manuscript "</span><span>Detecting Transient Deformation at the Active Volcano Ol Doinyo Lengai in Tanzania with the TZVOLCANO Network<span>" in consideration for publication in the Geophysical Research Letters. tzvolcano_code_and_models.zip contains all necessary Targeted Projection Operator (TPO) software, input, and output files for the GNSS inversions presented in our manuscript necessary to reproduce the results. The TPO program is a Unix/Linux code developed by <span>Kang-Hyeun Ji working at the Korea Institute for Geoscience and Mineral Resources, Daejeon, South Korea. The source code is available in the supplementary Zenodo repository. We also include input and output model files for the USGS code dMODELS for reproducibility. Please see the README.txt file for more details.</span></span></span></p> <p><span>This study was funded by the US National Science Foundation grant number EAR-1943681 to Virginia Tech, internal university funds via Ardhi University, and Ministry of Science and ICT of Korea Basic Research Project GP2021-006 to the Korea Institute of Geosciences and Mineral Resources. We acknowledge and thank the EarthScope Consortium for archiving and making TZVOLCANO GNSS datasets freely available, supported by the National Science Foundation’s Seismological Facility for the Advancement of Geoscience (SAGE) Award under Cooperative Support Agreement EAR-1851048 and Geodetic Facility for the Advancement of Geoscience (GAGE) Award under NSF Cooperative Agreement EAR-1724794.</span></p>
Density and characteristics of tree cavities inside and outside Volcanoes National Park, Rwanda
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Mineralogy and origin of aerosol from an arc basaltic eruption: case study of Tolbachik volcano, Kamchatka
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Data from: Factors determining forest diversity and biomass on a tropical volcano, Mt. Rinjani, Lombok, Indonesia
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Data from: Spatial variation in anuran richness, diversity, and abundance across montane wetland habitat in Volcanoes National Park, Rwanda
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Data from: Living on a volcano's edge: genetic isolation of an extremophile terrestrial metazoan
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Geochemical data for: Intense overpressurization at basaltic open-conduit volcanoes as inferred by geochemical signals: The case of the Mt. Etna December 2018 eruption
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Dung counts large mammals Volcanoes NP, Rwanda, 2008 and 2021
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.