Abstract
AbstractA devastating Mw 7.5 earthquake and tsunami struck northwestern Sulawesi, Indonesia on 28 September 2018, causing over 4000 fatalities and severe damage to several areas in and around Palu City. Severe earthquake-induced soil liquefaction and landslides claimed hundreds of lives in three villages within Palu. The mainshock occurred at 18:03 local time at a depth of 10 km on a left-lateral strike-slip fault. The hypocenter was located 70 km north of Palu City and the rupture propagated south, under Palu Bay, passing on land on the west side of Palu City. The surface rupture of the earthquake has been mapped onshore along a 30 km stretch of the Palu-Koro fault. We present results of field surveys on the effects of the earthquake, tsunami and liquefaction conducted between 1–3 and 12–19 of October 2018. Seismic intensities on the Modified Mercalli Intensity (MMI) scale are reported for 375 sites and reach a maximum value of 10. We consolidate published tsunami runup heights from several field studies and discuss three possible interrelated tsunami sources to explain the variation in observed tsunami runup heights. Due to limited instrumentation, PGA and PGV values were recorded at only one of our field sites. To compensate, we use our seismic intensities and Ground Motion to Intensity Conversion Equations (GMICEs) and Ground Motion Prediction Equations (GMPEs) developed for similar tectonic regions. Our results indicate that the maximum predicted PGAs for Palu range from 1.1 g for GMICEs to 0.6 g for GMPEs.
Publisher
Springer Science and Business Media LLC
Subject
Geochemistry and Petrology,Geophysics
Reference90 articles.
1. Arikawa, T., Muhari, A., Okumura, Y., Dohi, Y., Afriyanto, B., Sujatmiko, K. A., & Imamura, F. (2018). Coastal subsidence induced several tsunamis during the 2018 Sulawesi earthquake. Journal of Disaster Research, 13, sc20181204. https://doi.org/10.20965/jdr.2018.sc20181201
2. Atkinson, G. M., Worden, C. B., & Wald, D. J. (2014). Intensity prediction equations for North America. Bulletin of the Seismological Society of America, 104(6), 3084–3093.
3. Bacques, G., de Michele, M., Foumelis, M., et al. (2020). Sentinel optical and SAR data highlights multi-segment faulting during the 2018 Palu–Sulawesi earthquake (Mw 7.5). Scientific Reports, 10, 9103. https://doi.org/10.1038/s41598-020-66032-7
4. Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) (2018) Laporan survey lapangan tsunami Donggala 28 September 2018, Tim BMKG Pusat, Balai IV, Palu, Gowa.
5. Badan Nasional Penanggulangan Becana (BNPB) (2010) Disaster Data and Information Indonesia Bencana (Indonesian National Disaster Management Agency), Jakarta, http://dibi.bnpb.go.id.
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献