Title: Coda Q Dependence on Time, Frequency and Coda Duration Interval at Mt. Etna, Sicily
Abstract: A re-estimate of coda Q (Qc) was carried out on short period vertical seismograms of earthquakes located on Etna volcano, Sicily. Care was taken in selecting coda duration intervals in which the estimates are made. A clear dependence of Qc on frequency and coda duration interval has been evidenced. Qc is proportional to fn with n equal to 1 for short coda duration intervals (25 s) and with n equal to or less than 0.8 for longer codas. A depth effect and/or the presence of multiple scattering can be the cause of the Qc dependence on coda duration. Dependence of Qc on time was investigated in an 8-year time interval. An increase of 1/Q seems to occur before the volcanic eruptions but we cannot place a statistical significance on the results.
Publication Year: 1992
Publication Date: 1992-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 28
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