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Spectral analysis of harmonic tremor signals at Mt. Semeru Volcano, Indonesia
Author(s) -
Schlindwein Vera,
Wassermann Joachim,
Scherbaum Frank
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01433
Subject(s) - harmonics , volcano , spectral analysis , geology , seismology , harmonic , spectral line , harmonic analysis , signal (programming language) , physics , acoustics , mathematics , computer science , spectroscopy , astronomy , mathematical analysis , quantum mechanics , voltage , programming language
A detailed spectral analysis of tremor signals recorded at Mt. Semeru volcano, Indonesia, in October 1992 by the German‐Indonesian Volcano Expedition (GIVE'92) reveals clearly harmonic spectra containing up to 11 integer harmonics. The spectral features can be explained by any rhythmically pulsating source producing a temporarily stable source signal. As one realisation of this concept we model the source as a resonating gas volume, generating seismic signals similar to the sound generated in a recorder.