Uji Signifikansi Stasiun GPS Kontinu dan Periodik dalam Identifikasi Pergerakan Koseismik
DOI:
https://doi.org/10.25077/jfu.13.1.89-95.2024Keywords:
Gempa Bumi, Koseismik, GPS, Uji signifikansiAbstract
Pengukuran pergerakan bumi dengan menggunakan sistem GPS telah menjadi bagian penting dalam pemahaman deformasi kerak bumi yang berkaitan dengan aktivitas seismik. Dalam penelitian ini dilakukan uji  signifikansi dari stasiun GPS yang beroperasi secara kontinu dan periodik dalam mengidentifikasi pergerakan koseismik gempa Pesisir Barat pada 10 Maret 2020 (M5,8)  dan gempa Bengkulu pada 19 Agustus 2020 (M6,8). Pengolahan data GPS menggunakan perangkat lunak GAMIT/GLOBK yang bertujuan  untuk mendapatkan koordinat dan nilai pergeseran koseismik. Hasil penelitian menunjukan bahwa rata-rata titik tidak menunjukan pergeseran secara signifikan baik dari data GPS kontinu maupun data GPS periodik. Terdapat satu titik pengamatan yang menunjukkan  pergeseran secara signifikan yaitu stasiun pengamatan PRKB yang menunjukkan  pergeseran sebesar ~2-3 mm. Uji signifikansi dipengaruhi oleh nilai pergeseran koseismik dan standar deviasinya yang dipengaruhi mekanisme gempa. Uji signifikansi dari pengamatan stasiun GPS menunjukkan  tidak terdapat perbedaan baik dari data GPS secara kontinu maupun GPS secara periodik pada uji signifikansi karena  gempa yang diamati relatif kecil sehingga menghasilkan pergeseran koseismik yang relatif kecil.
References
Abidin, H. Z. (2007). Penentuan posisi dengan GPS dan aplikasinya. Jakarta: PT Pradnya Paramita.
Abidin, H.Z., Andreas, H., Meilano, I., Gamal, M., Gumilar, I. and Abdullah, C.I., 2009. Deformasi koseismik dan pascaseismik gempa Yogyakarta 2006 dari hasil survei GPS. Indonesian Journal on Geoscience, 4(4), pp.275-284.
Albano, M., Barba, S., Bignami, C., Carminati, E., Doglioni, C., Moro, M., Saroli, M., Samsonov, Sergey., & Stramondo, S. (2021).
Numerical analysis of interseismic, coseismic and post-seismic phases for normal and reverse faulting earthquakes in Italy. Geophysical Journal International, 225(1), 627-645.
Alif, S. M., Fattah, E. I., Kholil, M., & Anggara, O. (2021). Source of the 2019 Mw6. 9 Banten Intraslab earthquake modelled with GPS data inversion. Geodesy and Geodynamics.
Alif, S. M., Cahyani, P. F., Anggara, O., & Rizqiansyah, A. (2022). Slip Rate of Kumering Fault in Lampung Province Calculated from GPS Data from 2007 to 2021. Jurnal Geosains dan Teknologi, 5(2), 83-90.
Alif, S. M., Siagian, J. M., & Anggara, O. (2023). Present-day Crustal Deformation in West Sumatra After Series of Sumatran Great Earthquake from 2004-2010. Journal of Earth and Marine Technology (JEMT), 3(2), 59-68.
Altamimi, Z., Rebischung, P., Métivier, L., & Collilieux, X. (2016). ITRF2014: A new release of the International Terrestrial Reference Frame modeling nonlinear station motions. Journal of geophysical research: solid earth, 121(8), 6109-6131.
Banerjee, P., Pollitz, F., Nagarajan, B., & Bürgmann, R. (2007). Coseismic slip distributions of the 26 December 2004 Sumatra–Andaman and 28 March 2005 Nias earthquakes from GPS static offsets. Bulletin of the Seismological Society of America, 97(1A), S86-S102.
Chlieh, M., Avouac, J. P., Sieh, K., Natawidjaja, D. H., & Galetzka, J. (2008). Heterogeneous coupling of the Sumatran megathrust constrained by geodetic and paleogeodetic measurements. Journal of Geophysical Research: Solid Earth, 113(B5).
Estey, L. H., & Meertens, C. M. (1999). TEQC: the multi-purpose toolkit for GPS/GLONASS data. GPS solutions, 3(1), 42-49.
Faris, A., Kriswati, E., Meilano, I., & Sarsito, D. A. (2018). Analisis Deformasi Gunung Api Batur Berdasarkan Data Pengamatan GPS Berkala Tahun 2008, 2009, 2013, dan 2015 Deformation Analysis Of Batur Volcano Based On Periodic GPS Observations Data in 2008, 2009, 2013, and 2015. Jurnal Lingkungan dan Bencana Geologi, 9(1), 1-10.
Herring, T. A., King, R. W., & McClusky, S. C. (2018). GPS analysis at MIT. GAMIT reference manual.
Herring, T. A., King, R. W., & McClusky, S. C. (2010). Introduction to gamit/globk. Massachusetts Institute of Technology, Cambridge, Massachusetts.
Hofmann-Wellenhof, B., Lichtenegger, H., & Wasle, E. (2007). GNSS–global navigation satellite systems: GPS, GLONASS, Galileo, and more. Springer Science & Business Media.
Hilla, S. (2002). A new plotting program for Windows-based TEQC users. GPS solutions, 6(3), 196-200.
King, M. A., & Watson, C. S. (2010). Long GPS coordinate time series: multipath and geometry effects. Journal of Geophysical Research: Solid Earth, 115(B4).
Li, Y. (2021). Analysis of GAMIT/GLOBK in high-precision GNSS data processing for crustal deformation. Earthquake Research Advances, 1(3), 100028.
McLoughlin, I. V., Wong, K. J., & Tan, S. L. (2011). Data collection, communications and processing in the Sumatran GPS array (SuGAr). In Proceedings of the World Congress on Engineering (Vol. 2, pp. 6-8).
Mustofa, A., 2013. Uji Hipotesis Statistik. Gapura Publishing.
Vigny, C., Simons, W.J.F., Abu, S., Bamphenyu, R., Satirapod, C., Choosakul, N., Subarya, C., Socquet, A., Omar, K., Abidin, H.Z. and Ambrosius, B.A.C., 2005. Insight into the 2004 Sumatra–Andaman earthquake from GPS measurements in southeast Asia. Nature, 436(7048), pp.201-206.
Wessel, P., Smith, W. H., Scharroo, R., Luis, J., & Wobbe, F. (2013). Generic mapping tools: improved version released. Eos, Transactions American Geophysical Union, 94(45), 409-410.
Zheng, Z., Jin, S., & Fan, L. (2018). Co-seismic deformation following the 2007 Bengkulu earthquake constrained by GRACE and GPS observations. Physics of the Earth and Planetary Interiors, 280, 20-31.
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