Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1348
DC Field | Value | Language |
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dc.contributor.authorall | Gil-Cruz, F.; INGEOMINAS, Observatorio Vulcanológico y Sismológico de Manizales, Colombia | en |
dc.date.accessioned | 2006-07-26T12:36:14Z | en |
dc.date.available | 2006-07-26T12:36:14Z | en |
dc.date.issued | 1999-06 | en |
dc.identifier.uri | http://hdl.handle.net/2122/1348 | en |
dc.description.abstract | Since the reactivation of Galeras volcano in 1988 its seismic activity has been dominated by a variety of LP waveforms and tremor events. Some of these signals occurred as a response to volcanic activity. Among them, two kinds of tremor deserve special attention, Flute tremor and Spasmodic tremor. Flute tremor has a spectrum of equally spaced peaks and is associated with a quasi-steady degassing process at the top of the lava dome. It is accompanied by a flute-like sound. Its spectral features and the correlation with field observations are consistent with a model generation indicating that a crack or set of cracks are excited to resonance by the release and flow of gas through the lava dome. Spasmodic tremor is composed of several distinct LP-like events joined together by a continuous signal with lower amplitudes. Two types of spasmodic tremor may be distinguished on the basis of their spectral characteristics and field observations. Spasmodic tremor type I is apparently dominated by a mix of P, SH and Rayleigh waves as determined from preliminary polarization analysis. The source appears to be located, in a region west of the active crater. As a first approximation, Spasmodic tremor type I could be associated with magmatic intrusion process occurred in 1989-1991. | en |
dc.format.extent | 5085045 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.relation.ispartofseries | 3/42 (1999) | en |
dc.subject | Galeras volcano | en |
dc.subject | harmonic tremor | en |
dc.subject | spasmodic tremor | en |
dc.subject | degassing activity | en |
dc.subject | resonance | en |
dc.subject | crack | en |
dc.title | Observations of two special kinds of tremor at Galeras volcano, Colombia(1989-1991) | 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.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.01. Gases | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Gil-Cruz, F. | en |
dc.contributor.department | INGEOMINAS, Observatorio Vulcanológico y Sismológico de Manizales, Colombia | 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 de Manizales, Colombia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Annals of Geophysics |
Files in This Item:
File | Description | Size | Format | |
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07 cruz.pdf | 4.97 MB | Adobe PDF | View/Open |
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