Present-day Crustal Deformation in West Sumatra After Series of Sumatran Great Earthquake from 2004-2010

Satrio Muhammad Alif, Jenny Melynda Siagian, Ongky Anggara

Abstract


Present-day crustal deformation was an attempt to estimate earthquake potential, yet the presence of postseismic deformation should be carefully identified. Studying crustal deformation in West Sumatra has been important for this purpose since the series of Sumatran Great Earthquake from 2004-2010. This study utilized present-day GNSS data (2017-2021) and pre-2004 GNSS velocities to understand the present-day crustal deformation. Bernese 5.2 was used to process the GNSS data and linear regression was used to calculate present-day velocities. These velocities were transformed into an ITRF2000-based Sundaland plate reference frame and then the velocities were compared to pre-2004 velocities in the same reference frame. The present-day velocities were ranging from 28.4 mm/yr to 58.3 mm/yr in ITRF2014 and from 8.8 to 44.8 mm/yr in the Sundaland plate reference frame. This suggests West Sumatra was located on the Sumatra block of the Sundaland plate. The low velocity difference (< 11.7 mm/yr) with the random vector direction between present-day velocities and pre-2004 velocities shows that there is no postseismic deformation affecting West Sumatra. This proposes the utilization of present-day velocities for earthquake potential estimation in West Sumatra.

Keywords


Crustal deformation; Earthquake; GNSS velocity; Postseismic deformation; Sumatra.

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References


Mendoza, L. P. O., A. Richter, E. R. Marderwald, J. L. Hormaechea, G. Connon, M. Scheinert, R. Dietrich, and R. A. Perdomo. "Horizontal and vertical deformation rates linked to the Magallanes-Fagnano Fault, Tierra del Fuego: Reconciling geological and geodetic observations by modeling the current seismic cycle." Tectonics 41, no. 1. 2022: e2021TC006801. https://doi.org/10.1029/2021TC006801

McCaffrey, R.. "The tectonic framework of the Sumatran subduction zone." Annual Review of Earth and Planetary Sciences 37, no. 1. 2009: 345-366. DOI: 10.1146/annurev.earth. 031208.100212

DeMets, C., G. Gordon, and F. Argus. "Geologically current plate motions." Geophysical journal international 181, no. 1. 2010: 1-80. https://doi.org/10.1111/j.1365-246X.2009.04491.x

Sieh, K, and D. Natawidjaja. "Neotectonics of the Sumatran fault, Indonesia." Journal of Geophysical Research: Solid Earth 105, no. B12. 2000: 28295-28326. https://doi.org/10.1029/ 2000JB900120

Alif, S. M., I. Meilano, E. Gunawan, and J. Efendi. "Evidence of postseismic deformation signal of the 2007 M8. 5 Bengkulu earthquake and the 2012 M8.6 Indian Ocean earthquake in Southern Sumatra, Indonesia, based on GPS data." Journal of Applied Geodesy 10, no. 2. 2016: 103-108. https://doi.org/10.1515/jag-2015-0019

Newman, A. V., G. Hayes, Y. Wei, and J. Convers. "The 25 October 2010 Mentawai tsunami earthquake, from real‐time discriminants, finite‐fault rupture, and tsunami excitation." Geophysical Research Letters 38, no. 5. 2011. https://doi.org/10.1029/2010GL046498

Wiseman, Kelly, P. Banerjee, R. Bürgmann, K. Sieh, D. S. Dreger, and I. Hermawan. "Source model of the 2009 M w 7.6 Padang intraslab earthquake and its effect on the Sunda megathrust." Geophysical Journal International 190, no. 3. 2012: 1710-1722. https://doi.org/10.1111/j.1365-246X.2012.05600.x

Alif, S. M., E. I. Fattah, M. Kholil, and O. Anggara. "Source of the 2019 Mw6. 9 Banten Intraslab earthquake modelled with GPS data inversion." Geodesy and Geodynamics 12, no. 4. 2021: 308-314. https://doi.org/10.1016/j.geog.2021.06.001

Bie, L., I. Ryder, and M. Metois. "Deep postseismic viscoelastic relaxation excited by an intraslab normal fault earthquake in the Chile subduction zone." Tectonophysics 712. 2017: 729-735. https://doi.org/10.1016/j.tecto.2017.07.012

Gunawan, E., S. Widiyantoro, G. I. Marliyani, E. Sunarti, R. Ida, and A. R. Gusman. "Fault source of the 2 September 2009 Mw 6.8 Tasikmalaya intraslab earthquake, Indonesia: Analysis from GPS data inversion, tsunami height simulation, and stress transfer." Physics of the Earth and Planetary Interiors 291. 2019: 54-61.DOI: 10.1016/j.pepi.2019.04.004

Lubis, A. M., "Pemanfaatan Survey GPS Geodetik untuk Pengamatan Deformasi Inter-seismik Setelah Satu Dekade Kejadian Gempa Bumi Bengkulu 2007. Mw 8.4. di Daerah Bengkulu Bagian Utara." Jurnal Geosains dan Teknologi 4, no. 1. 2021: 1-10. https://doi.org/10.14710/ jgt.4.1.2021.1-10

McLoughlin, I. V., K. J. Wong, and S. L. Tan. "Data collection, communications and processing in the Sumatran GPS array. SuGAr.." In Proceedings of the World Congress on Engineering, vol. 2, pp. 6-8. 2011.

Tsang, L. LH, E. M. Hill, S. Barbot, Q. Qiu, L. Feng, I. Hermawan, P. Banerjee, and D. H. Natawidjaja. "Afterslip following the 2007 Mw 8.4 Bengkulu earthquake in Sumatra loaded the 2010 Mw 7.8 Mentawai tsunami earthquake rupture zone." Journal of Geophysical Research: Solid Earth 121, no. 12. 2016: 9034-9049. https://doi.org/10.1002/2016JB013432

Dach, R., S. Lutz, P. Walser, and P. Fridez. "Bernese GNSS software version 5.2.". 2015.

Abidin, H. Z., H. Andreas, T. Kato, T. Ito, I. Meilano, F. Kimata, D. H. Natawidjaya, and H. Harjono. "Crustal deformation studies in Java. Indonesia. using GPS." Journal of Earthquake and Tsunami 3, no. 02. 2009: 77-88. https://doi.org/10.1142/S1793431109000445

Altamimi, Z., P. Rebischung, L. Métivier, and X. Collilieux. "ITRF2014: A new release of the International Terrestrial Reference Frame modeling nonlinear station motions." Journal of geophysical research: solid earth 121, no. 8. 2016: 6109-6131. https://doi.org/10.1002/2016JB013098

Feng, L, E. M. Hill, P. Banerjee, I. Hermawan, L. LH Tsang, D. H. Natawidjaja, B. W. Suwargadi, and K Sieh. "A unified GPS‐based earthquake catalog for the Sumatran plate boundary between 2002 and 2013." Journal of Geophysical Research: Solid Earth 120, no. 5. 2015: 3566-3598. https://doi.org/10.1002/2014JB011661

Prawirodirdjo, L., R. McCaffrey, C. D. Chadwell, Y. Bock, and C. Subarya. "Geodetic observations of an earthquake cycle at the Sumatra subduction zone: Role of interseismic strain segmentation." Journal of Geophysical Research: Solid Earth 115, no. B3. 2010. https://doi.org/ 10.1029/2008JB006139

Simons, W. J. F., A. Socquet, C. Vigny, B. A. C. Ambrosius, S. H. Abu, C. Promthong, C. Subarya. "A decade of GPS in Southeast Asia: Resolving Sundaland motion and boundaries." Journal of Geophysical Research: Solid Earth 112, no. B6. 2007. https://doi.org/10.1029/2005JB003868

Stein, S., and M. Wysession. An introduction to seismology, earthquakes, and earth structure. John Wiley & Sons, 2009.

Alif, S. M., M. S. Sauri, and R. S. Perdana. "Perubahan Kecepatan Subduksi Lempeng Indo-Australia terhadap Lempeng Sundaland akibat Gempa Bumi Samudera Hindia tahun 2016." Jurnal Geosains dan Teknologi 4, no. 3. 2021: 159-167. https://doi.org/10.14710/jgt.4.3.2021.159-167

Hanifa, N. R. , T. Sagiya, F. Kimata, J. Efendi, H. Z. Abidin, and I. Meilano. "Interplate coupling model off the southwestern coast of Java, Indonesia, based on continuous GPS data in 2008–2010." Earth and Planetary Science Letters 401. 2014: 159-171. https://doi.org/10.1016/ j.epsl.2014.06.010

Kuncoro, H., I. Meilano, and S. Susilo. "Sunda and Sumatra Block Motion in ITRF2008." In E3S Web of Conferences, vol. 94, p. 04006. EDP Sciences, 2019.

Yong, C. Z. . "Tectonic geodesy: an analysis of the crustal deformation of the western Sundaland plate from nearly two decades of continuous GPS measurements." PhD diss., University of Otago, 2019.

Widiyantoro, S., E. Gunawan, A. Muhari, N. Rawlinson, J. Mori, N. R. Hanifa, S. Susilo et al. "Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia." Scientific reports 10, no. 1. 2020: 1-11. https://doi.org/10.5281/zenodo.3935744.

Alif, S. M., A. N. Hidayah, A. I. Fauzi, and R. S. Perdana. "Analisis Pentingnya Gempa Bumi sebagai Faktor Pemicu Kejadian Gerakan Tanah di Lampung Barat." Jurnal Lingkungan dan Bencana Geologi 12, no. 3. 2021: 170-180.

Wessel, P. , W.HF Smith, R. Scharroo, J. Luis, and F. Wobbe. "Generic mapping tools: improved version released." Eos, Transactions American Geophysical Union 94, no. 45. 2013: 409-410. https://doi.org/10.1002/2013EO450001




DOI: https://doi.org/10.31284/j.jemt.2023.v3i2.3733

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