Methodology for calculating trifunac duration

Authors

  • Zagdsuren Sainbayar Khovd branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0000-0002-4138-9687
  • Baasansuren Shurkhuu Khovd branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
  • Diimaa Baatarjav Khovd branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
  • Batbayar Purevkhuu Khovd branch, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia

DOI:

https://doi.org/10.5564/mjag.v12i1.5194

Keywords:

Trifunac Duration, Arias intensity, cumulative absolute velocity

Abstract

In July 2005, with the support of France’s DASE, an accelerometer (SMACH, 2005) was installed on rocky ground to the east of the Khovd seismic station to record ground acceleration during felt earthquakes. Since its installation, the station has recorded more than 20 strong earthquakes that occurred in the western region of Mongolia. The vibrations from these earthquakes were felt by residents of Khovd city and nearby soums, and due to the high ground motion, they were successfully registered by the station. From the recorded data, several strong events were analyzed to determine parameters such as Peak Ground Acceleration, Peak Ground Velocity, Peak Ground Displacement, Response Spectrum, Arias and Housner Intensities, Trifunac Duration, and Cumulative Absolute Velocity. This paper focuses on analyzing the Trifunac duration to determine the period during which the maximum energy of seismic waves is released during an earthquake.

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References

Atkinson G.M., K. S. (2007). Relationship between felt intensity and instrumental ground motion in the central United States and California. Bull. Seismol. Soc. Am., 97, N°2, 497-510.

Chopra, A. K. (2012). Dynamics of Structures: Theory and Applications to Earthquake Engineering. New Jersey: University of California at Berkely.

Housner, G. (1952). Intensity of ground motion during strong earthquakes. 1952.EERL.1952.001.

Kayen, R. a. (1997). Assessment of Liquefaction Potential during Earthquakes by Arias Intensity. Journal of Geotechnical and Geoenvironmental Engineering.

Rosenblueth, N. N. (1971). Fundamentals of Earthquake Engineering. Prentice Hall: Englewood Cliffs.

Trifunac M.D, a. A. (1975). A Study on the Duration of Strong Earthquake Ground Motion. Bulletin of the Seismological Society of America, 581-626.

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Published

2025-12-30

How to Cite

Sainbayar, Z., Shurkhuu, B., Baatarjav, D., & Purevkhuu, B. (2025). Methodology for calculating trifunac duration. Mongolian Journal of Astronomy and Geophysics, 12(1), 18–28. https://doi.org/10.5564/mjag.v12i1.5194

Issue

Vol. 12 No. 1 (2025)

Section

Research Articles

License

Copyright (c) 2025 Zagdsuren Sainbayar, Baasansuren Shurkhuu, Diimaa Baatarjav, Batbayar Purevkhuu

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