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Empirical models for the prediction of ground motion duration for intraplate earthquakes

Journal Article


Abstract


  • Many empirical relationships for the earthquake ground motion duration were developed for interplate region, whereas only a very limited number of empirical relationships exist for intraplate region. Also, the existing relationships were developed based mostly on the scaled recorded interplate earthquakes to represent intraplate earthquakes. To the author¿s knowledge, none of the existing relationships for the intraplate regions were developed using only the data from intraplate regions. Therefore, an attempt is made in this study to develop empirical predictive relationships of earthquake ground motion duration (i.e., significant and bracketed) with earthquake magnitude, hypocentral distance, and site conditions (i.e., rock and soil sites) using the data compiled from intraplate regions of Canada, Australia, Peninsular India, and the central and southern parts of the USA. The compiled earthquake ground motion data consists of 600 records with moment magnitudes ranging from 3.0 to 6.5 and hypocentral distances ranging from 4 to 1000 km. The non-linear mixed-effect (NLMEs) and logistic regression techniques (to account for zero duration) were used to fit predictive models to the duration data. The bracketed duration was found to be decreased with an increase in the hypocentral distance and increased with an increase in the magnitude of the earthquake. The significant duration was found to be increased with the increase in the magnitude and hypocentral distance of the earthquake. Both significant and bracketed durations were predicted higher in rock sites than in soil sites. The predictive relationships developed herein are compared with the existing relationships for interplate and intraplate regions. The developed relationship for bracketed duration predicts lower durations for rock and soil sites. However, the developed relationship for a significant duration predicts lower durations up to a certain distance and thereafter predicts higher durations compared to the existing relationships.

UOW Authors


  •   Anbazhagan, P (external author)
  •   Sheikh, M Neaz.
  •   Bajaj, Ketan (external author)
  •   Mariya Dayana, P (external author)
  •   Madhura, H (external author)
  •   Reddy, G (external author)

Publication Date


  • 2017

Citation


  • Anbazhagan, P., Sheikh, M., Bajaj, K., Mariya Dayana, P., Madhura, H. & Reddy, G. R. (2017). Empirical models for the prediction of ground motion duration for intraplate earthquakes. Journal of Seismology, 21 (4), 1001-1021.

Scopus Eid


  • 2-s2.0-85014026376

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6620

Has Global Citation Frequency


Number Of Pages


  • 20

Start Page


  • 1001

End Page


  • 1021

Volume


  • 21

Issue


  • 4

Place Of Publication


  • Netherlands

Abstract


  • Many empirical relationships for the earthquake ground motion duration were developed for interplate region, whereas only a very limited number of empirical relationships exist for intraplate region. Also, the existing relationships were developed based mostly on the scaled recorded interplate earthquakes to represent intraplate earthquakes. To the author¿s knowledge, none of the existing relationships for the intraplate regions were developed using only the data from intraplate regions. Therefore, an attempt is made in this study to develop empirical predictive relationships of earthquake ground motion duration (i.e., significant and bracketed) with earthquake magnitude, hypocentral distance, and site conditions (i.e., rock and soil sites) using the data compiled from intraplate regions of Canada, Australia, Peninsular India, and the central and southern parts of the USA. The compiled earthquake ground motion data consists of 600 records with moment magnitudes ranging from 3.0 to 6.5 and hypocentral distances ranging from 4 to 1000 km. The non-linear mixed-effect (NLMEs) and logistic regression techniques (to account for zero duration) were used to fit predictive models to the duration data. The bracketed duration was found to be decreased with an increase in the hypocentral distance and increased with an increase in the magnitude of the earthquake. The significant duration was found to be increased with the increase in the magnitude and hypocentral distance of the earthquake. Both significant and bracketed durations were predicted higher in rock sites than in soil sites. The predictive relationships developed herein are compared with the existing relationships for interplate and intraplate regions. The developed relationship for bracketed duration predicts lower durations for rock and soil sites. However, the developed relationship for a significant duration predicts lower durations up to a certain distance and thereafter predicts higher durations compared to the existing relationships.

UOW Authors


  •   Anbazhagan, P (external author)
  •   Sheikh, M Neaz.
  •   Bajaj, Ketan (external author)
  •   Mariya Dayana, P (external author)
  •   Madhura, H (external author)
  •   Reddy, G (external author)

Publication Date


  • 2017

Citation


  • Anbazhagan, P., Sheikh, M., Bajaj, K., Mariya Dayana, P., Madhura, H. & Reddy, G. R. (2017). Empirical models for the prediction of ground motion duration for intraplate earthquakes. Journal of Seismology, 21 (4), 1001-1021.

Scopus Eid


  • 2-s2.0-85014026376

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6620

Has Global Citation Frequency


Number Of Pages


  • 20

Start Page


  • 1001

End Page


  • 1021

Volume


  • 21

Issue


  • 4

Place Of Publication


  • Netherlands