Results 31 to 40 of about 544 (134)

Seismological analysis of conduit dynamics in fragmentation experiments

Journal of Geophysical Research: Solid Earth, Volume 119, Issue 3, Page 2215-2229, March 2014., 2014
AbstractWe simulate gas‐burst and volcanic explosions under controlled laboratory conditions inducing fragmentation of volcanic rocks by rapid depressurization. A series of experiments were performed in a shock‐tube apparatus at room temperature and a pressure range of 4 to 20 MPa using Argon (Ar) gas and, particles or pumice samples of different ...
A. Arciniega‐Ceballos, M. Alatorre‐Ibargüengoitia, B. Scheu, D. B. Dingwell, H. Delgado‐Granados   +4 more
wiley   +1 more source

Long period seismic source characterization at Popocatépetl volcano, Mexico

Geophysical Research Letters, Volume 39, Issue 20, 28 October 2012., 2012
The seismicity of Popocatépetl is dominated by long‐period and very‐long period signals associated with hydrothermal processes and magmatic degassing. We model the source mechanism of repetitive long‐period signals in the 0.4–2 s band from a 15‐station broadband network by stacking long‐period events with similar waveforms to improve the signal‐to ...
Alejandra Arciniega‐Ceballos, Phillip Dawson, Bernard A. Chouet   +2 more
wiley   +1 more source

Temporal variations in helium and argon isotopic compositions of fumarolic gases at Kusatsu-Shirane volcano, Japan

Goldschmidt2021 abstracts, 2021
The helium isotopic ratio ( 3 He/ 4 He) in the mantle (8 Ra, where the atmospheric 3 He/ 4 He is 1 Ra) is much higher than that in the crust (
T. Obase, H. Sumino, Kotaro Toyama, A. Terada, T. Ohba, Muga Yaguchi   +5 more
semanticscholar   +1 more source

Seismic source mechanisms of tremor recorded on Arenal volcano, Costa Rica, retrieved by waveform inversion [PDF]

, 2011
International audienceMoment tensor inversions of volcanic tremor are synthetically tested and subsequently applied to a dataset recorded on Arenal volcano in 2005.
Bean, C.J., Davi, R., De Barros, L., Lesage, Philippe, Lokmer, I., Mora, Mauricio M., O'Brien, G. S., Soto, Gerardo   +7 more
core   +3 more sources

High precision locations of long-period events at La Fossa Crater (Vulcano Island, Italy) [PDF]

, 2009
Since the last eruption in 1888-90, the volcanic activity on Vulcano Island (Aeolian Archipelago, Italy) has been limited to fumarolic degassing. Fumaroles are mainly concentred at the active cone of La Fossa in the northern sector of the island and are ...
Cammarata, Laura, Gambino, Salvatore, Rapisarda, Salvatore   +2 more
core   +3 more sources

Oscillation frequencies of long-period seismic events at Kusatsu-Shirane volcano, Japan, related to the volume of water vapor in a hydrothermal crack

Geophysical Journal International
Long-period (LP) seismic events at active volcanoes are characterized by damped harmonic oscillations, which are thought to be generated by resonances in fluid-filled cracks.
Masayuki Nakano, Hiroyuki Kumagai, K. Taguchi   +2 more
semanticscholar   +1 more source

A generalized equation for the resonance frequencies of a fluid-filled crack [PDF]

, 2017
Although a model of the resonance of a rectangular fluid-filled crack (crack model) is one of the most frequently used source models of long-period seismic events at volcanoes, there has been no analytical solution for the resonance frequencies.
72187, 72188, Kumagai, Hiroyuki, Maeda, Yuta   +3 more
core   +1 more source

Seismicity of the Askja and Bárðarbunga volcanic systems of Iceland, 2009-2015 [PDF]

, 2020
A large seismic network deployed in the Icelandic highlands recorded more than 100,000 earthquakes from 2009 to 2015. We develop a local magnitude scale, appropriate for use in central Iceland, which is similar to the scale used by the Iceland ...
Agustsdottir, Thorbjorg, Greenfield, Tim, White, RS, Winder, Tom   +3 more
core   +1 more source

Precise remote-monitoring technique of water volume and temperature of a crater lake in Aso volcano, Japan: implications for a sensitive window of a volcanic hydrothermal system [PDF]

, 2008
A high-resolution Digital Surface Model and a commercial digital camera have enabled precise and continuous monitoring of the crater lake at Aso volcano.
A W Hurst, A Wehr, C Oppenheimer, C Oppenheimer, G L Rowe, H Brown, M Yamamoto, P J Ryan, S Ohsawa, T Kagiyama, T Ohba, Y Tanaka   +11 more
core   +2 more sources

Carbon Storage in the Forearc Produced by Buoyant Diapirs of Subducted Sediment

Geophysical Research Letters, Volume 51, Issue 3, 16 February 2024.
Abstract Carbonate sediments transported into the mantle at subduction zone settings account for the majority of the carbon flux into the Earth's interior and are thus critical to the deep carbon cycle. Understanding carbon storage volumes in the deep earth requires knowledge of the degree to which carbonate sediments are stored in the arc lithosphere ...
Xinxin Wang, Liang Zhao, Jianfeng Yang, Zhengtang Guo   +3 more
wiley   +1 more source