Embassy Science Fellowship Program Focuses on Earthquake Research
Articles, UC QuakeStudies
A blog post from US Ambassador to New Zealand and Samoa, David Huebner, titled, "Embassy Science Fellowship Program Focuses on Earthquake Research".
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Transcript of Brenda's earthquake story
Articles, UC QuakeStudies
Transcript of Brenda's earthquake story, captured by the UC QuakeBox project.
Transcript of June's earthquake story
Articles, UC QuakeStudies
Transcript of June's earthquake story, captured by the UC QuakeBox project.
Transcript of Edel Walker's earthquake story
Articles, UC QuakeStudies
Transcript of Edel Walker's earthquake story, captured by the UC QuakeBox project.
Transcript of Al Park's earthquake story
Articles, UC QuakeStudies
Transcript of Al Park's earthquake story, captured by the UC QuakeBox project.
Transcript of Katrina Lyman's earthquake story
Articles, UC QuakeStudies
Transcript of Katrina Lyman's earthquake story, captured by the UC QuakeBox project.
UC QuakeBox photograph taken by Waynne Williams Port Hills Productions (8)
Images, UC QuakeStudies
Sally Roome and Troy Gillan at the UC QuakeBox in the carpark of Westfield Riccarton.
UC QuakeBox photograph taken by Waynne Williams Port Hills Productions (9)
Images, UC QuakeStudies
Sally Roome and Troy Gillan at the UC QuakeBox in the carpark of Westfield Riccarton.
Ambient noise cross-correlation observations of fundamental and higher-mod…
Research papers, Victoria University of Wellington
Measurement of basement seismic resonance frequencies can elucidate shallow velocity structure, an important factor in earthquake hazard estimation. Ambient noise cross correlation, which is well-suited to studying shallow earth structure, is commonly used to analyze fundamental-mode Rayleigh waves and, increasingly, Love waves. Here we show via multicomponent ambient noise cross correlation that the basement resonance frequency in the Canterbury region of New Zealand can be straightforwardly determined based on the horizontal to vertical amplitude ratio (H/V ratio) of the first higher-mode Rayleigh waves. At periods of 1-3 s, the first higher-mode is evident on the radial-radial cross-correlation functions but almost absent in the vertical-vertical cross-correlation functions, implying longitudinal motion and a high H/V ratio. A one-dimensional regional velocity model incorporating a ~ 1.5 km-thick sedimentary layer fits both the observed H/V ratio and Rayleigh wave group velocity. Similar analysis may enable resonance characteristics of other sedimentary basins to be determined. © 2013. American Geophysical Union. All Rights Reserved.
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