Study of seismic site effects using H/V spectral ratios at Arenal Volcano, Costa Rica - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Geophysical Research Letters Year : 2001

Study of seismic site effects using H/V spectral ratios at Arenal Volcano, Costa Rica

Abstract

By using data obtained with a linear array at Arenal volcano, we show that the H/V spectral ratio method can be profitably applied to detect site effects on volcanoes. Similar results are obtained when calculating spectral ratios with different types of seismo-volcanic signals (tremor, ambient noise, explosion quakes, LP events). We compare the H/V ratios with theoretical S-wave transfer functions calculated using velocity models obtained from seismic refraction studies. There is a good agreement when the H/V ratios display sharp peaks, indicating a close relationship between the ratios and the transfer function of the shallow structure. Furthermore, the main peaks of the spectral ratios are consistent with local amplification of seismic waves observed at the corresponding frequencies.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2001 - Mora - Study of seismic site effects using H V spectral ratios at Arenal Volcano .pdf (437.58 Ko) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

insu-03606672 , version 1 (12-03-2022)

Licence

Copyright

Identifiers

Cite

Mauricio M. Mora, Philippe Lesage, Jacques Dorel, Pierre-Yves Bard, Jean-Philippe Métaxian, et al.. Study of seismic site effects using H/V spectral ratios at Arenal Volcano, Costa Rica. Geophysical Research Letters, 2001, 28, pp.2991-2994. ⟨10.1029/2001GL013049⟩. ⟨insu-03606672⟩
37 View
33 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More