Mapping Seismic Vulnerability Index (Kg) For Earthquake Swarm Activity In Western Halmahera, Indonesia

Authors

  • Rohima Wahyu Ningrum Khairun University
  • Hendra Fauzi Khairun University
  • Wiwit Suryanto Khairun University
  • Estuning Tyas Wulan Mei Khairun University

Keywords:

swarm, seismic vulnerability index,, HVSR

Abstract

This research was conducted to determine seismic vulnerability index based on microtremor analysis and make microzonation of seismic vulnerability index in West Halmahera district. The microzonation is expected to be used for regional development based on earthquake disaster mitigation. The swarm earthquake that occurred in West Halmahera regency, although not significant in terms of loss of life, greatly affected the stability and capacity of the region in terms of infrastructure development. Data acquisition at the research location obtained 56 point locations. Microtremor data were analyzed using the Horizontal to Vertical Spectral Ratio (HVSR) method to obtain frequency and amplification values that can be used to calculate the value of seismic vulnerability (Kg) from a region. The results obtained are the seismic vulnerability index (Kg) value in West Halmahera Regency is 0 cm/s2 - 31341.52 cm/s2. The highest Kg value is located in Jailolo sub-district at point D10 which is 10397.1 cm/s2. This is closely related to the total amount of damage to buildings in Jailolo Subdistrict due to the earthquake in November 2015 to February 2016. Whereas for other Subdistricts classified as medium to low Kg values, it can be concluded that having a stable soil structure.

References

Ansal, A., Erdik M, Studer J., Springman S., Laue J., Buchheister J., Giardini D., Faeh D., and Koksal D., (2004). Seismic Microzonation For Earthquake Risk Mitigation In Turkey. 13th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 1428

Daryono. 2011. Seismic Vulnerability Index Based on Microtremor in Various Landform Units at Bantul Graben Zone, Yogyakarta Special Province. Dissertation. Geographic Graduate Faculty Program of Gadjah Mada University. Yogyakrta: Indonesia.

Holtkamp. S., and Brudzinki. M.R., 2014. Megathrust earthquake swarms indicate frictional changes which delimit large earthquake ruptures. Earth and Planetary Science Letters. Elsevier. http://dx.doi.org/10.1016/j.epsl.2013.10.033.

Mogi, K., 1963, Some discussions on aftershocks, foreshocks, and earthquake swarms- The fracture of a semi-infinite body caused by an inner stress origin and its relation to the earthquake phenomena (third paper), Bull. Earthquake Res. Inst. Univ. Tokyo, 41, 615–658.

Nakamura, Y., 2000. Clear Identification of Fundamental Idea of Nakamura’s Technique and Its Application. World Conference of Earthquake Engineering.

Nakamura, Y., Sato, T., and Nishinaga, M., 2000. Local Site Effect of Kobe Based on Microtremor Measurement. Proceeding of the Sixth International Conference on Seismic Zonation EERI, Palm Springs California.

Nakamura, Y., 2008. On The H/V Spectrum. The 14thWorld Conference on Earthquake Engineering, Beijing, China.

Passarelli, L., Heryandoko, N., Cesca,S., Rivalta, E., Rasmid., Rohadi, S., Dahm, T., and Milkereit, C., 2018, Magmatic or Not Magmatic? The 2015–2016 Seismic Swarm at the Long-Dormant Jailolo Volcano, West Halmahera, Indonesia. Frontiers in Earth Science. June 2018 , Volume 6, Article 79.

Putri. Y.T., Heryandoko.N., Wandono. Marulak.R., Suwardi, Zulfikasr, Yuniarto.B., Pary.L., and Kamaruddin.B., 2016. Relokasi Dan Distribusi bValue Gempabumi Swarm Jailolo, Halmahera Barat. JURNAL METEOROLOGI DAN GEOFISIKA VOL. 17 NO. 3 TAHUN 2016 : 199-206

Warnana, D. D., Soemitro, R. A., & Utama, W., 2011, Application of Microtremor HVSR Method for Assessing Site Effect in Residual Soil Slope. International Journal of Basic & Applied Sciences IJBAS-IJENS, 04.

Downloads

Published

2018-12-31

Issue

Vol. 1 (2018): Proceedings of International Conference on Multidisciplinary Engineering (ICOMDEN)

Section

Articles

License

Copyright (c) 2025 Rohima Wahyu Ningrum, Hendra Fauzi, Wiwit Suryanto, Estuning Tyas Wulan Mei

Creative Commons License

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Copyright Notice

Authors published in this journal agree to the following terms:
1. The copyright of each article is retained by the author (s).
2. The author grants the journal the first publication rights with the work simultaneously licensed under the Creative Commons Attribution License, allowing others to share the work with an acknowledgment of authorship and the initial publication in this journal.
3. Authors may enter into separate additional contractual agreements for the non-exclusive distribution of published journal versions of the work (for example, posting them to institutional repositories or publishing them in a book), with acknowledgment of their initial publication in this journal.
4. Authors are permitted and encouraged to post their work online (For example in the Institutional Repository or on their website) before and during the submission process, as this can lead to productive exchanges, as well as earlier and larger citations of published work.
5. Articles and all related material published are distributed under a Creative Commons Attribution-ShareAlike 4.0 International License.