Earthquake Microzonation Using Microtremor Analysis and Horizontal to Vertical Spectral Ratio Method Study Case at Ampelgading and Tirtoyudo Sub-district, Malang, East Java

DOI

10.2991/978-94-6463-148-7_14How to use a DOI?

Keywords

HVSR; microtremor; microzonation; seismic susceptibility index

Abstract

The earthquake that occurred on April 10, 2021, with a magnitude of 6, was felt in several areas on the island of Java and Ampelgading and Tirtoyudo sub-districts are the most affected areas. Due to the impact caused by the earthquake, a method is needed to be able to reduce the destructive effects of earthquakes. One way is to conduct a seismic hazard assessment or microzonation using microtremor. Microtremor data was measured in these two sub-districts are able to determine the parameters of soil characteristics based on natural frequency, amplitude, and seismic susceptibility index. Microtremor data analysis used the HVSR method with geopsy software to collect two main parameters, f0 and A0. Then from these parameters can be used to calculate the seismic susceptibility index parameter. The results showed that the natural frequency ranged from 1.28–13.23 Hz, with areas with low natural frequencies being in the central to southern Ampelgading District and the central to northern Tirtoyudo District. The amplitude has a value range of 1.33–10.77, with high amplitude areas located in the middle part of Ampelgading and Tirtoyudo Districts. The seismic susceptibility index has a value range of 0.13–29.91, with areas with a high seismic susceptibility index located in the central part of Ampelgading and Tirtoyudo Districts, including Jogomulyan Village, Kepatihan Village, Sumbertangkil Village located in Tirtoyudo District, as well as Wirotaman Village and Sonowangi Village located in Ampelgading District and were the villages most affected by the earthquake.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Juan Pandu Gya Nur Rochman
AU  - Mirza Akbar Sadewa
AU  - Aditya Manafiska Putra
PY  - 2023
DA  - 2023/05/29
TI  - Earthquake Microzonation Using Microtremor Analysis and Horizontal to Vertical Spectral Ratio Method Study Case at Ampelgading and Tirtoyudo Sub-district, Malang, East Java
BT  - Proceedings of the 12th International Conference on Green Technology (ICGT 2022)
PB  - Atlantis Press
SP  - 127
EP  - 136
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-148-7_14
DO  - 10.2991/978-94-6463-148-7_14
ID  - Rochman2023
ER  -