SEISMIC WAVE TIME OF ARRIVAL AND PATH VELOCITY ESTIMATION USING 1-HZ GPS DATA

Authors

  • Mohd Azizi Alim Shah Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia https://orcid.org/0009-0008-9813-132X
  • Wan Anom Wan Aris Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Ahmad Zuri Sha’ameri School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Tajul Ariffin Musa Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
  • Shahidatul Sadiah Abdul Manan School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia

DOI:

https://doi.org/10.11113/jurnalteknologi.v85.19240

Keywords:

Earthquake, High-rate GPS, Seismic wave, TOA, Path velocity

Abstract

This paper proposed the method of determining seismic wave TOA and path velocity from Global Positioning System (GPS) data. High-rate GPS data from 13 Continuous Operational Reference Station (CORS) were utilized to obtain displacement and seismic waveform during the occurrence of Sumatra-Andaman 9.2Mw earthquake 2004. To detect seismic body waves using GPS data is difficult because of attenuated signal, therefore seismic surface waves have been used. The seismic wave TOA of between 116 s to 194 s was determined using time-frequency representation (TFR). The estimated seismic wave path velocities were found within the range of 3.8 km/s to 4.6 km/s, indicated as secondary wave or surface wave. To validate the estimated path velocity, it was compared with other research with an average value of 6 km/s to 13 km/s for body wave and 2 km/s to 5 km/s for surface wave. These results indicate that GPS CORS can be an alternative sensor for detecting earthquakes other than seismometers.

Published

2023-09-17

How to Cite

Alim Shah, M. A. ., Wan Aris, W. A. ., Sha’ameri, A. Z. ., Musa, T. A. ., & Abdul Manan, S. S. . (2023). SEISMIC WAVE TIME OF ARRIVAL AND PATH VELOCITY ESTIMATION USING 1-HZ GPS DATA. Jurnal Teknologi, 85(6), 111-119. https://doi.org/10.11113/jurnalteknologi.v85.19240

Issue

Vol. 85 No. 6: Forthcoming Issue November 2023

Section

Science and Engineering

License

Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.