Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1653
AuthorsAsch, G.* 
Wylegalla, K.* 
Hellweg, M.* 
Seidl, D.* 
Rademacher, H.* 
TitleObservations of rapid-fire event tremor at Lascar volcano, Chile
Issue DateMar-1996
Series/Report no.39/2
URIhttp://hdl.handle.net/2122/1653
Keywordsvolcano seismology
volcanic tremor
rapid-fire events
Lascar volcano
Subject Classification04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
AbstractDuring the Proyecto de Investigaciòn Sismològica de la Cordillera Occidental (PISCO '94) in the Atacama desert of Northern Chile, a continuously recording broadband seismic station was installed to the NW of the currently active volcano, Lascar. For the month of April, 1994, an additional network of three, short period, three-component stations was deployed around the volcano to help discriminate its seismic signals from other local seismicity. During the deployment, the volcanic activity at Lascar appeared to be limited mainly to the emission of steam and SO2. Tremor from Lascar is a random, «rapid-fire» series of events with a wide range of amplitudes and a quasi-fractal structure. The tremor is generated by an ensemble of independent elementary sources clustered in the volcanic edifice. In the short-term, the excitation of the sources fluctuates strongly, while the long-term power spectrum is very stationary.
Appears in Collections:Annals of Geophysics

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