Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8682
AuthorsDel Pezzo, E.* 
Bianco, F.* 
Borgna, I.* 
TitleMagnitude scale for LP events: a quantification scheme for volcanic quakes
Issue Date29-Apr-2013
Series/Report no./194 (2013)
DOI10.1093/gji/ggt126
URIhttp://hdl.handle.net/2122/8682
KeywordsEarthquake source observations;
Volcano monitoring
Volcano seismology
Subject Classification04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
AbstractThe peculiar source characteristics of long-period seismic events (time persistency of the source, low-frequency peaks in the source spectrum, absence of high-frequency radiation) prevent the formation of a definite high-frequency coda in the seismograms. In contrast, this is well formed in volcano–tectonic quakes. For this reason, the widely used duration magnitude scale that is based on the proportionality between the energy and the coda duration cannot be used for long-period estimation. In observatory practice, the long-period magnitude is sometimes estimated using the same duration magnitude scale, leading to confusing results. In this report, we show a new method to estimate the magnitude of long-period events that generally occur for volcanoes, with some application examples from data for Mt Etna (Italy), Colima Volcano (Mexico) and Campi Flegrei (Italy).
Appears in Collections:Papers Published / Papers in press

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