Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2420
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dc.contributor.authorallCaruso, F.; Scuola Superiore di Catania, Universit`a di Cataniaen
dc.contributor.authorallVinciguerra, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallLatora, V.; Dipartimento di Fisica e Astronomia, Universit`a di Cataniaen
dc.contributor.authorallRapisarda, A.; Dipartimento di Fisica e Astronomia, Universit`a di Cataniaen
dc.contributor.authorallMalone, S.; Department of Earth and Space Sciences, University of Washingtonen
dc.date.accessioned2007-09-03T07:26:51Zen
dc.date.available2007-09-03T07:26:51Zen
dc.date.issued2006en
dc.identifier.urihttp://hdl.handle.net/2122/2420en
dc.description.abstractWe present a multifractal analysis of Mount St. Helens seismic activity during 1980–2002. The seismic time distribution is studied in relation to the eruptive activity, mainly marked by the 1980 major explosive eruptions and by the 1980–1986 dome building eruptions. The spectrum of the generalized fractal dimensions, i.e. Dq versus q, extracted from the data, allows us to identify two main earthquake time distribution patterns. The first one exhibits a multifractal clustering correlated to the intense seismic swarms of the dome building activity. The second one is characterized by an almost constant value of Dq ≈ 1, as for a random uniform distribution. The time evolution of Dq (for q = 0.2), calculated on a fixed number of events window and at different depths, shows that the brittle mechanical response of the shallow layers to rapid magma intrusions, during the eruptive periods, is revealed by sharp changes, acting at a short time scale (order of days), and by the lowest values of Dq (≈ 0.3). Conversely, for deeper earthquakes, characterized by intense seismic swarms, Dq do not show obvious changes during the whole analyzed period, suggesting that the earthquakes, related to the deep magma supply system, are characterized by a minor degree of clustering, which is independent of the eruptive activity.en
dc.language.isoEnglishen
dc.relation.ispartofFractalsen
dc.relation.ispartofseries3/4(2006)en
dc.subjectEarthquakes Time Distributionsen
dc.subjectMultifractal Clusteringen
dc.subjectSt. Helens Volcanismen
dc.subjectDepth Analysisen
dc.titleMultifractal analysis of Mt. St. Helens seismicity as a tool for identifying eruptive activityen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber179-186en
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismologyen
dc.subject.INGV05. General::05.01. Computational geophysics::05.01.04. Statistical analysisen
dc.relation.referencesD. L. Turcotte, Fractals and Chaos in Geology and Geophysics (Cambridge University Press, 1992). P. Bak, C. Tang and K. Wiesenfeld, Phys. Rev. Lett. 59 (1987) 381–384; H. J. Jensen, Self-Organized Criticality (Cambridge University Press, Cambridge, 1998). D. L. Turcotte, Phys. Earth Planet. Int. 111 (1999) 275–293; F. Caruso, A. Pluchino, V. Latora, A. Rapisarda and B. Tadic, Eur. Phys. J. B 50 (2006) 243–247. P. Tosi, V. De Rubeis, V. Loreto and L. Pietronero, Ann. Geophys. 47 (2004) 1–6; V. De Rubeis, P. Dimitriu, E. Papadimitriou and P. Tosi, Geophys. Res. Lett. 20 (1993) 1911–1914. V. De Rubeis, P. Tosi and S. Vinciguerra, Geophys. Res. Lett. 24 (1997) 2331–2334. D. Legrand, A. Cisternas and L. Dorbath, Geophys. Res. Lett. 23 (1996) 933–936. S. Gresta and G. Patan`e, Pure Appl. Geophys. 121 (1983) 287–295. V. Latora, A. Rapisarda and S. Vinciguerra, Phys. Earth Planet. Int. 109 (1998) 115–127. S. Vinciguerra, Geophys. Res. Lett. 26 (1999) 24, 3685–3688. P. P. Dimitriu, E.M. Scordilis and V. G. Karacostas, Natural Hazards 21 (2000) 277–295. L. Telesca, V. Lapenna and F. Vallianatos, Phys. Earth Planet. Int. 131 (2002) 63–79. S. Malone, Geosci. Canada 17 (1990) 3, 146–150. C. Musumeci, S. Gresta and S. D. Malone, J. Geophys. Res. Solid Earth 107 (2002) 16. P. Grassberger and I. Procaccia, Physica D 9 (1983) 189. R. C. Hilborn, Chaos and Nonlinear Dynamics, 2nd edn. (Oxford University Press, Oxford, 2000). J. C. Sprott, Chaos and Time-Series Analysis (Oxford University Press, Oxford, 2003). S. R. Brantley and B. Myers, Mount St. Helens: From the 1980 Eruption to 2000, USGS factsheet 0036-00, http://geopubs.wr.usgs.gov/factsheet/ fs036-00/fs036-00.pdf (2000).en
dc.description.fulltextreserveden
dc.contributor.authorCaruso, F.en
dc.contributor.authorVinciguerra, S.en
dc.contributor.authorLatora, V.en
dc.contributor.authorRapisarda, A.en
dc.contributor.authorMalone, S.en
dc.contributor.departmentScuola Superiore di Catania, Universit`a di Cataniaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentDipartimento di Fisica e Astronomia, Universit`a di Cataniaen
dc.contributor.departmentDipartimento di Fisica e Astronomia, Universit`a di Cataniaen
dc.contributor.departmentDepartment of Earth and Space Sciences, University of Washingtonen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptCNR-INFM and Scuola Normale Superiore, Pisa, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptDip. di Fis, Univ. di Catania-
crisitem.author.deptUniversità di Catania, Dipartimento di Fisica e Astronomia-
crisitem.author.deptDepartment of Earth and Space Sciences, University of Washington Seattle, Washington, USA.-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent05. General-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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