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On heterogeneities with reduced viscosity in the mantle under the Kamchatka volcanoes according to seismological data [PDF]
Bulletin Volcanologique, 1973 A seismological study of the upper mantle under the Kamchatka volcanoes using body waves from nearby earthquakes has shown local heterogencities consisting of materials with reduced elastic properties at depths from 30 to 90 km.
Farberov A.I. +2 more
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Recent eruptions at Bezymianny volcano—A seismological comparison
Journal of Volcanology and Geothermal Research, 2013Abstract For the past few decades, Bezymianny volcano has erupted once to twice per year. Here, I examine eight eruptive events between 2006 and 2010. This is the first time period for which proximal or broadband seismic data have been recorded at Bezymianny. Several recurring patterns are demonstrated in advance of eruptions. Eruptions are generally
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Polarization Analysis in the Discrete Wavelet Domain: An Application to Volcano Seismology
Bulletin of the Seismological Society of America, 2010Abstract We propose a method for analyzing the polarization of three-component digital recordings using the discrete wavelet transform (DWT). This method allows for the automatic detection and separation of seismic phases that have a coherent linear or elliptical polarization.
L. D'Auria +5 more
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Seismological aspects of the 1989–1990 eruptions at redoubt volcano, Alaska: the SSAM perspective
Journal of Volcanology and Geothermal Research, 1994Abstract SSAM is a simple and inexpensive tool for continuous monitoring of average seismic amplitudes within selected frequency bands in near real-time on a PC-based data acquisition system. During the 1989–1990 eruption sequence at Redoubt Volcano, the potential of SSAM to aid in rapid identification of precursory Long-Period (LP) event swarms was ...
Christopher D. Stephens +4 more
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New Methods and Future Trends in Seismological Volcano Monitoring
1996Volcanic processes operate over a wide range of time scales that require a variety of instruments and techniques for their study. Short-period seismology typically covers the band 0.1–1 s, while broadband seismology can extend that band to 0.1–100 s.
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Listening to Volcanoes: Current Frontiers in Volcano Seismology and Acoustics
Volcano seismology and acoustics have advanced rapidly in recent years, significantly improving our ability to observe and interpret volcanic processes across a wide range of spatial and temporal scales. This talk will provide a broad overview of currently relevant topics in these fields, with an emphasis on how seismic and acoustic observations ...openaire +1 more source
APPLICATION OF SEISMOLOGY-BASED VOLCANO MONITORING TECHNIQUES AT WHAKAARI/WHITE ISLAND VOLCANO
Volcanoes present some of the most immediate and unpredictable natural hazards, particularly when they erupt without clear precursors. Phreatic and phreatomagmatic eruptions are especially challenging to forecast because they involve rapid interactions between shallow magma, hydrothermal fluids, and sealed rock layers.openaire +1 more source
More than a drumbeat – Towards a new suite of periodic patterns in volcano-seismology
Volcano observatories often rely on their ability to accurately decipher volcano-seismic signals to assess the state of a specific volcanic system. For this purpose, well-established patterns such as VT and LP event sequences during pre-eruptive unrest phases – or their periodic manifestation as ‘drumbeats’ – constitute a trusted and reasonably well ...Bastian Steinke +2 more
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