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Time series analysis of lava flux

Odbert, H.M. and Wadge, G. (2009) Time series analysis of lava flux. Journal of Volcanology and Geothermal Research, 188 (4). pp. 305-314. ISSN 0377-0273

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To link to this article DOI: 10.1016/j.jvolgeores.2009.09.005

Abstract/Summary

We have applied time series analytical techniques to the flux of lava from an extrusive eruption. Tilt data acting as a proxy for flux are used in a case study of the May–August 1997 period of the eruption at Soufrière Hills Volcano, Montserrat. We justify the use of such a proxy by simple calibratory arguments. Three techniques of time series analysis are employed: spectral, spectrogram and wavelet methods. In addition to the well-known ~9-hour periodicity shown by these data, a previously unknown periodic flux variability is revealed by the wavelet analysis as a 3-day cycle of frequency modulation during June–July 1997, though the physical mechanism responsible is not clear. Such time series analysis has potential for other lava flux proxies at other types of volcanoes.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical and Physical Sciences > National Centre for Earth Observation (NCEO)
Faculty of Science > School of Mathematical and Physical Sciences > Environmental Systems Science Centre
ID Code:7518
Uncontrolled Keywords:lava flux; proxies; eruption processes; time series analysis
Publisher:Elsevier

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