Results 201 to 210 of about 985 (249)
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Seismicity at Ceboruco Volcano, Mexico
Seismological Research Letters, 2009Determining whether a volcanic area exhibits seismicity and identifying the rates and types of signals that are occurring are important diagnostic tools for assessing volcanic unrest. We present an analysis of seismicity recorded with a single available sensor, and some parameters that we can determine from it, to demonstrate the level of unrest and ...
J. J. Sanchez +3 more
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Seismic tomography of Etna volcano
Journal of Volcanology and Geothermal Research, 1993Abstract A 3-D velocity model beneath Etna volcano has been obtained through inversion of P-wave arrivals of local earthquakes. About 300 seismic events distributed around this volcano from surface up to a depth of 20 km have been used to infer the P-wave velocity structure.
CARDACI C +4 more
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How is Volcano Seismicity Different from Tectonic Seismicity?
Bulletin of the Seismological Society of America, 2010We analyze the temporal patterns of volcano seismicity using the statis- tics of waiting times between subsequent earthquakes. We compare waiting time distributions of seismicity at Mt. Etna and Mt. Vesuvius volcanoes during (1) inter- eruption phases and (2) dyke propagations, with those of tectonic seismicity using the southern California catalog ...
Traversa, Paola, Grasso, Jean-Robert
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Hydraulic Transients: A Seismic Source in Volcanoes and Glaciers
Science, 1979A source for certain low-frequency seismic waves is postulated in terms of the water hammer effect. The time-dependent displacement of a water-filled subglacial conduit is analyzed to demonstrate the nature of the source. Preliminary energy calculations and the observation of hydraulically generated seismic radiation from a dam indicate the ...
W S, Lawrence, A, Qamar
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Volcano-tectonic seismicity at Unzen Volcano, Japan, 1985–1999
Journal of Volcanology and Geothermal Research, 2001Abstract The eruption of Unzen Volcano in southwestern Japan began on November 17, 1990, and an extrusion of a dacite lava dome lasted from May 20, 1991, until early February 1995. The seismic network operated by the Shimabara Earthquake and Volcano Observatory of Kyushu University (SEVO) located about 4000 volcano-tectonic earthquakes during the ...
K. Umakoshi, H. Shimizu, N. Matsuwo
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Mud Volcanoes and Seismicity in Romania
2005Due to the occurrence of mud volcanoes and active seismic areas in close proximity in Romania, good conditions can be found for studying the relationship between the two phenomena. The most important earthquakes are generated within the Vrancea zone, related to a lithospheric fragment sunken into the astenosphere.
Calin Baciu, Giuseppe Etiope
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The Predictability of Seismicity: Bezymyannyi Volcano
Journal of Volcanology and Seismology, 2018This paper presents results from the estimation of predictability for the seismicity of Bezymyannyi Volcano based on data from the catalog of P.I. Tokarev (1955–1970) containing earthquakes in the Northern Volcanic Cluster area, Kamchatka (1971–1996, 1999–2013) and my processing of volcanic tremor during the eruptions of 1981–1986.
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Seismicity observed under Snæfellsjökull volcano
Jökull, 2013The Snæfellsnes peninsula in western Iceland is characterized by Pleistocene volcanism dominated by alkalic magmatism across an extinct (>6 Ma) axial rift zone of the Mid-Atlantic Ridge. Although Iceland has an extensive seismic coverage, no systematic seismic monitoring is in place on the Snæfellsnes peninsula.
Florian Fuchs +4 more
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Mud Volcanoes, Geodynamics and Seismicity
2005Contributing Authors. Preface. 1: Mud volcanic geology. New seismic neogene clay diapirs and hydrocarbon implications in the North-eastern African margin of Tunisia M. Bedir. Seismic signature of gas hydrate and mud volcanoes of the South African continental margin Z. Ben-Avraham, et al.
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The Predictability of the Seismicity on Shiveluch Volcano
Journal of Volcanology and Seismology, 2018This paper presents the results from estimating the predictability of the seismicity of Shiveluch Volcano based on the earthquake catalog for the Northern Group of Kamchatka Volcanoes for 1971–1996 and 1999–2013. The mathematical model that we employed is a nonlinear second-order differential equation, while the algorithms of optimization and ...
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