Towards an automated Kappa measurement procedure

Tim Sonnemann, Benedikt Halldorsson*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


We present an automatic algorithm for measuring the high-frequency acceleration spectral decay parameter (κ) on seismic records of strong ground motion. This task is often done manually due to the strongly varying quality and characteristics of earthquake recordings, such that an adaptive algorithm is required to mostly reproduce manual measurements but in a less subjective way. We prepended a P- and S-phase picking algorithm to achieve complete automation, and we discuss the common pitfalls for such attempts regarding both algorithms. To test the measurement schemes, a dataset of accelerograms from South Icelandic earthquakes is used on which all parameters have been determined manually as well. The proposed program facilitates automatic creation of κ-value databases from input record databases, which might be used in regional hazard analyses and to better constrain earthquake source parameter inversions.

Original languageEnglish
Title of host publicationGeotechnical, Geological and Earthquake Engineering
PublisherSpringer Netherlands
Number of pages14
Publication statusPublished - 2019

Publication series

NameGeotechnical, Geological and Earthquake Engineering
ISSN (Print)1573-6059
ISSN (Electronic)1872-4671

Bibliographical note

Publisher Copyright:
© Springer International Publishing AG, part of Springer Nature 2019.

Other keywords

  • High frequency amplitude decay
  • Kappa
  • Near-surface attenuation
  • Strong ground motion


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