新皇冠体育app

Encyclopedia of Earthquake Engineering

Living Edition
| Editors: Michael Beer, Ioannis A. Kougioumtzoglou, Edoardo Patelli, Ivan Siu-Kui Au

Very-Long-Period Seismicity at Active Volcanoes: Source Mechanisms

  • Gregory P. WaiteEmail author
Living reference work entry
DOI: http://doi.org/10.1007/978-3-642-36197-5_46-1
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Synonyms

Introduction

Deformation at active volcanoes spans a wide range of frequencies, from permanent changes up to cycles of 100s of Hz. Scattering and anelasticity attenuate the high-frequency signals rapidly, making their detection difficult. The dominant range of frequencies observed with seismological methods, between about 0.5 and 5 Hz, has been well recorded for many decades, beginning with analog recordings. Studies of discrete events and longer-duration tremor in this so-called long-period (LP) band have led to significant advances in understanding of volcanological processes, but studies of events with lower frequencies have only been possible since the use of instruments that can record them has become widespread (Long-period and Very Long-period Seismicity on Active Volcanoes: Significance).

新皇冠体育appVery-long-period (VLP) seismicity with frequencies below the LP band has been observed at nearly every type of active volcano,...

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Authors and Affiliations

  1. 1.Department of Geological and Mining Engineering and SciencesMichigan Technological UniversityHoughtonUSA