PERBANDINGAN NILAI PERCEPATAN TANAH MAKSIMUM BERDASARKAN MODIFIKASI KONSTANTA ATENUASI DAN DATA ACCELEROGRAPH TAHUN 2008-2016 PADA STASIUN BMKG LAMPUNG
DOI:
https://doi.org/10.23960/jge.v4i2.17Keywords:
PGA, Lampung, earthquakeAbstract
Peak ground acceleration is one of the parameters used in estimating the extent of breakdown caused by earthquake shocks. In the present study, the determination of an attenuation empirical formula PGA (Peak Ground Acceleration) based on the attenuation equation Lin and Wu (2010). Data used in the study of seismic event data by period year 2008-2012. Through the calculation of regression analysis, then obtained the function attenuation of peak ground acceleration in Lampung region at each station accelerograph.At the LWLI accelerograph station obtained the value of the empirical coefficient of the distance of earthquake -2.351, the empirical coefficient of earthquake magnitude 0,574, and the constant 2,430. At the KASI accelerograph station obtained the value of the empirical coefficient of the distance of earthquake -2.522, the empirical coefficient of earthquake magnitude 0.654, and the constant 2.182. At the BLSI accelerograph station obtained the value of the empirical coefficient from the distance of earthquake -3.224, the empirical coefficient of earthquake magnitude 0.651, and constant 4,092. At the KLI accelerograph station obtained the value of the empirical coefficient from the distance of earthquake -2.746, the empirical coefficient of earthquake magnitude 0.751, and the constant 2.053.Result of correlation test verification, chart relation between distance and magnitude earthquakes, ratio PGA contour maps, as well as a ratio between the value of PGA models with the observation of accelerograph year 2013-2016 show that the acceleration attenuation function of the obtained soil is relatively good. Based on PGA attenuation contour map model at an event the earthquake on 28th May 2011, PGA great value be found in the Liwa region with a PGA score of 10-20 gal and its seismic intensity value is V-VI MMI. It happens because of the source the earthquake is in the western sea of Liwa.
References
Badan Geologi., 2015. Wilayah Potensi Gerakan Tanah Di Provinsi Sumatera Barat Bulan Agustus 2015. Laporan Penelitian PVMBG. Bandung.
Badan Meteorologi, Klimatologi dan Geofisika, 2017. Indeks Seismisitas Wilayah Lampung. BMKG.
Borman, P., 2002. IASPEI New Manual of Seismological Observatory Practice (NMSOP). Geo Forschungs Zentrum Postdam (GFZ). Germany.
Edwiza, D., 2008. Analisis Terhadap Intensitas da Percepatan Tanah Maksimum Gempa Sumbar. Laboratorium Geofisika Jurusan Teknik Sipil Unad, No.29, Vol. 1.
Grandis, H., 2009. Pengantar Pemodelan Inversi Geofisika. Himpunan Ahli Geofisika Indonesia (HAGI).
Gumuntur, E., 2008. Peta Administrasi Provinsi Lampung. Bahan diklat geografi regional. Lampung.
Ibrahim, G., dan Subardjo, 2004. Pengetahuan Seismologi. Badan Meteorologi dan Geofisika. Jakarta.
Lin dan Wu, 2010. Magnitude Determination Using Strong Ground Motion Attenuation in Earthquake Early Warning. Journal Geophysical Research Letters, Vol.37, L07304.
Mangga, S.A., Amirudin, T., Suwarti, S., dan Sidarto, 1993. Peta Geologi Lampung, Sumatra. Pusat Penelitian dan Pengembangan Geologi. Bandung.
McGuire, R. K., 1977. Seismic Design Spectra And Mapping Procedures Using Hazard Analysis Based Directly On Oscillator Response, Earthquake Engineering and Structural Dynamics, 5, 211–234.
Mulyatno, B. S., dan Suharno, 2007. Analisis Atenuasi Energi Gempabumi Terhadap Medium Batuan Daerah Lampung Berdasarkan Data Gempabumi Tahun 2003-2005. Jurnal Sains MIPA, Edisi 2007, Vol. 13, No. 3, Hal: 257-260.
Natawidjaja, D. H., Kertapati, E.K., Meilano, I., Suhardjono, Asrurifak, M., dan Ridwan, M., 2010. Ringkasan hasil studi tim revisi peta gempa Indonesia 2010, Kementrian Pekerjaan Umum.
Naryanto, H. S., 2008. Analisis Potensi Kegempaan dan Tsunami Kawasan Pantai Barat Lampung Kaitanya dengan Mitigasi dan Penataan Kawasan. Jurnal Sains dan Teknologi Indonesia Vol. 10 No. 2 Agustus 2008 Hal. 71-77.
Sativa, O., 2015. Accelerograph BMKG. Bahan diklat seismotek BMKG. Jakarta.
Sieh, K. dan Natawidjaja, D., 2000. Neotectonics of Sumatra Fault, Indonesia. Journal of Geophysical Research Vol. 105, 28, 295-28, 326.
Setiawan, A. Y., 2012.Kajian Rumus empiris Percepatan Tanah Di Daerah Bali Dan Sekitarnya, Program Sarjana di Program Studi Meteorologi Institut Teknologi Bandung.
Subardjo, 2008. Parameter Gempabumi. Materi diklat teknis peningkatan kemampuan observasi Geofisika tahun 2008. Badan Meteorologi dan Geofisika. Jakarta.
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