Inferring seismic response of landslide-prone slopes from microtremor study

Vincenzo Del Gaudio, Janusz Wasowski, Chyi Tyi Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


The difficulty in identifying factors controlling the dynamic response of landslide-prone slopes to seismic shaking makes desirable the development of reconnaissance techniques to reveal site resonance conditions that can favour seismically-induced slope failures. Tests were performed to derive information on the occurrence of directional resonance by analysing the azimuthal variations of the horizontal-to-vertical spectral ratios of ambient noise (HVNR) recorded by portable seismometers. In particular, data were acquired in an area of central Italy (Caramanico Terme), affected in the past by seismically-induced landslides, and in two areas of Taiwan (Tsaoling and Jiufengershan), where the 1999 Chi-Chi earthquake triggered giant landslides. The HVNR analysis demonstrated that the presence of a pronounced directional resonance can be recognised from data acquired under different ambient conditions and with different sensors. However, measurement repetitions and uncertainty assessment are fundamental to distinguish persistent features, attributable to site effects, from transient phenomena due to variable ambient conditions.

Original languageEnglish
Title of host publicationLandslide Science and Practice
Subtitle of host publicationComplex Environment
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages11
ISBN (Print)9783642314261
StatePublished - 2013
Event2nd World Landslide Forum, WLF 2011 - Rome, Italy
Duration: 3 Oct 20119 Oct 2011

Publication series

NameLandslide Science and Practice: Complex Environment


Conference2nd World Landslide Forum, WLF 2011


  • HVNR
  • Microtremors
  • Seismically-induced landslides
  • Slope dynamic response


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