Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1345
DC Field | Value | Language |
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dc.contributor.authorall | Gómez M., D. M.; INGEOMINAS - Observatorio Vulcanológico y Sismológico Pasto, Colombia | en |
dc.contributor.authorall | Torres C., R. A.; INGEOMINAS - Observatorio Vulcanológico y Sismológico Pasto, Colombia | en |
dc.contributor.authorall | Seidl, D.; Seismologisches Zentralobservatorium Gräfenberg, Germany | en |
dc.contributor.authorall | Hellweg, M.; Institut für Geophysik, Universität Stuttgart, Germany | en |
dc.contributor.authorall | Rademacher, H.; Geo Enterprises Orinda, CA, U.S.A. | en |
dc.date.accessioned | 2006-07-26T12:35:47Z | en |
dc.date.available | 2006-07-26T12:35:47Z | en |
dc.date.issued | 1999-06 | en |
dc.identifier.uri | http://hdl.handle.net/2122/1345 | en |
dc.description.abstract | Long-duration events have been recorded at several active, andesitic volcanoes. Their main characteristics are a single, sharp frequency peak, and an exceptionally long coda. Because their seismograms resemble a screw, these signals are called "tornillos" in Colombia. These events have been recorded during different stages of volcanic activity at various volcanoes worldwide. Tornillos have occurred for example, as a short-term precursor to eruptions at Galeras volcano, Colombia (1992-1993); and at Asama volcano, Japan, (1983). At Tokachi volcano, Japan, they were recorded after an eruption (1989). The Tornillo's dominant frequency appears to be related to the time of occurrence during an eruption cycle. It is independent of epicentral distance, azimuth, travel time, and lapse time, indicating that it is a source characteristic. Damping coefficients for the tornillo's coda range between 0.002 and 0.02. In contrast, damping coefficients for normal long-period events lies between 0.010 and 0.025 and for volcano-tectonic events between 0.010 and 0.040. In March 1996, the Galeras seismic network, which consists of short period, single-component seismometers, was augmented with a broadband, three-component station. This station, installed 1.5 km south of Galeras active cone, recorded a series of six tornillos. Narrowband and broadband tornillo records have similar characteristics in the time and frequency domains. | en |
dc.format.extent | 4127971 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.relation.ispartofseries | 3/42 (1999) | en |
dc.subject | volcanoes | en |
dc.subject | seismic events | en |
dc.subject | broadband record | en |
dc.subject | tornillos | en |
dc.subject | Galeras volcano | en |
dc.title | Tornillo seismic events at Galeras volcano, Colombia: a summary and new information from broadband three-component measurements | en |
dc.type | article | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Gómez M., D. M. | en |
dc.contributor.author | Torres C., R. A. | en |
dc.contributor.author | Seidl, D. | en |
dc.contributor.author | Hellweg, M. | en |
dc.contributor.author | Rademacher, H. | en |
dc.contributor.department | INGEOMINAS - Observatorio Vulcanológico y Sismológico Pasto, Colombia | en |
dc.contributor.department | INGEOMINAS - Observatorio Vulcanológico y Sismológico Pasto, Colombia | en |
dc.contributor.department | Seismologisches Zentralobservatorium Gräfenberg, Germany | en |
dc.contributor.department | Institut für Geophysik, Universität Stuttgart, Germany | en |
dc.contributor.department | Geo Enterprises Orinda, CA, U.S.A. | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | INGEOMINAS - Observatorio Vulcanológico y Sismológico Pasto, Colombia | - |
crisitem.author.dept | INGEOMINAS, Observatorio Vulcanológico y Sismológico, Unidad Operativa Pasto, Colombia | - |
crisitem.author.dept | Bundesanstalt für Geowissenschaften und Rohstoffe, Seismologisches Zentralobservatorium Gräfenberg, Erlangen, Germany | - |
crisitem.author.dept | University of California, Berkeley Seismological Laboratory, Berkeley, USA | - |
crisitem.author.dept | 57 Overhill Rd., Orinda, CA, U.S.A. | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Annals of Geophysics |
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02 gomez.pdf | 4.03 MB | Adobe PDF | View/Open |
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