Results 191 to 200 of about 441,479 (240)

Sources of Volcanic Tremor Associated With the Summit Caldera Collapse During the 2018 East Rift Eruption of Kīlauea Volcano, Hawai'i

Journal of Geophysical Research - Solid Earth, 2021
Volcanic tremor occurring at the beginning of the 2018 Kīlauea eruption is characterized using both seismic and tilt data recorded at the Kīlauea summit.
J. Soubestre, B. Chouet, P. Dawson
semanticscholar   +1 more source

Fast Identification of Volcanic Tremor and Lahar Signals during the 2009 Redoubt Eruption Using Permutation Entropy and Supervised Machine Learning

Seismological Research Letters, 2021
Despite their usefulness for volcano monitoring, emergent seismic signals, such as volcanic tremor or signals generated by lahars, are difficult to identify with confidence in a timely fashion. Machine-learning algorithms offer an objective alternative
K. Konstantinou, Diah Ayu Rahmalia, I. Nurfitriana, M. Ichihara   +3 more
semanticscholar   +1 more source

Source mechanism of volcanic tremor

Journal of Geophysical Research: Solid Earth, 1982
Low‐frequency (<10 Hz) volcanic earthquakes originate at a wide range of depths and occur before, during, and after magmatic eruptions. The characteristics of these earthquakes suggest that they are not typical tectonic events. Physically analogous processes occur in hydraulic fracturing of rock formations, low‐frequency icequakes in temperate ...
M. G. Ferrick, A. Qamar, W. F. St. Lawrence   +2 more
openaire   +1 more source

Volcanic Tremor*

Bulletin of the Seismological Society of America, 1950
Abstract It is proposed that volcanic tremor originates in the vibration of laminae which are partly freed by the differential tilting of the surface of the earth around a volcanic vent during an eruption. The topographic evidence around Kilauea caldera is examined and a probable range of the free vibrating lengths is determined.
openaire   +1 more source

Volcanic tremor and frequency gliding during dike intrusions at Kı̄lauea—A tale of three eruptions

Journal of Geophysical Research: Solid Earth, 2015
Katharina Unglert, A M Jellinek
exaly   +2 more sources

On possible causes of volcanic tremor

Journal of Geophysical Research, 1975
The volcanic eruptions of different types are followed by volcanic tremor that is supposed to be initiated by the moving of the gases along the vent. Under some conditions the gas flow velocities can reach sonic values. The volcanic tremor is produced by the self-oscillations, which in turn are generated by the transition of subsonic to supersonic gas ...
Genrich S. Steinberg, Alexander S. Steinberg   +1 more
openaire   +1 more source

Structural changes of volcanic tremor at Stromboli volcano

Journal of Volcanology and Geothermal Research, 2008
Abstract The occurrence of a tectonic event sufficiently close to a volcano and/or sufficiently energetic can trigger a change in its eruptive activity. Examples include Ambrym (Vanuatu), Teide (Spain), Tungurahua (Ecuador) and Villarrica (Chile). Of course the possibility that an earthquake can even trigger a new eruption has serious implications in
FATTORI SPERANZA FRANCESCA, CARNIEL ROBERTO   +1 more
openaire   +1 more source

Origin of Shallow Volcanic Tremor: The Dynamics of Gas Pockets Trapped Beneath Thin Permeable Media

Journal of Geophysical Research - Solid Earth, 2019
Linking volcano‐seismic signals with subsurface processes is crucial to improve the forecasting of volcanic eruptions. One of the most enigmatic signals is shallow volcanic tremor, a highly periodic ground vibration that is typically sourced beneath the ...
T. Girona, C. Caudron, C. Huber
semanticscholar   +1 more source

Intermittent behaviour of volcanic tremor at Mt. Etna

pure and applied geophysics, 1996
Harmonic tremor is widely studied and modelled in a very narrow frequency band (1–5 Hz) which represents the eigenfrequencies of a resonator assumed as the source of the phenomenon. Minimal effort was dedicated towards understanding its behaviour in larger temporal scales.
GODANO, Cataldo, Cardaci C, Privitera E.
openaire   +2 more sources

A volcanic tremor monitoring system

Journal of Volcanology and Geothermal Research, 1985
Abstract The digitising system installed at the Chateau Observatory, in the North Island of New Zealand, to monitor Ruapehu and Ngauruhoe volcanoes is used to digitise the seismic records from three seismometers, and to calculate the power spectra of volcanic tremor in real-time, with the smoothed power spectra being recorded every 5 minutes on ...
openaire   +1 more source