Surface Rupture and Geotechnical Features of The July 2, 2013 Tanah Gayo Earthquake

Mudrik Rahmawan Daryono, Adrin Tohari

Abstract


DOI:10.17014/ijog.3.2.95-105

An assessment of surface rupture and collateral ground failures can help to evaluate the impact of future earthquakes. This paper presents the results of a field survey conducted to map the surface rupture and geotechnical phenomena associated with the ground shaking during the July 2, 2013 earthquakes in Tanah Gayo Highland. The objectives of this survey are to document and to characterize the surface ruptures as well as to identify types of earthquake-induced ground failures. Results of the survey identified four best sites of possible surface rupture. Two locations are obvious surface ruptures that can be traced on primary topographic feature of the active fault segment from the north to the south, crossing Pantan Terong Hill. The fault segment has a total mapped length of 19 km, with WNW trending zone and a dextral rupture offset. The ground shaking also resulted in landslides and liquefaction in areas underlain by very fine-grained tuffaceous sands. Based on the field survey, it can be concluded that the newly defined active fault segment, the Pantan Terong segment, is likely the segment that ruptured at the July 2, 2013 Tanah Gayo earthquake. Due to the soil types and unstable rocky slopes in the hilly Central Aceh region, large-scale landslides are primary risks during an earthquake event in this region.


Keywords


active fault; ground failure; Sumatran Fault; surface rupture; Tanah Gayo earthquake

References


Anonymous, 2010. Hillshade Tools: the Swiss Hill shade Model and the MDOW (Multi-Directional Oblique Weighting) Model. ESRIMapping-Center-Team. http://mappingcenter.esri .com/index.cfm?fa=arcgis Resources.gateway.

Anonymous, 2013. Impact - ShakeMap of M6.1-55km S of Bireun, Indonesia. USGS. http://earthquake.usgs.gov/earthquakes/eventpage/usb000i4re#impact_shakemap.

Cameron, N.R., Bridge, D.M., Clarke, M.C.G., Djunudin, A., Ghazali, S. A., Harahap, H., Jeffery, D.H., Kartawa, W., Keats, W., Ngabito, H., Rock, N.M.S., and Thompson, S.J., 1983. Geologic Map of the Takengon Quadrangle, Sumatera (1:250,000). Geological Research

and Development Centre, Indonesia.

Daryono, M.R., Natawidjaja, D.H., and Sieh, K., 2012. Twin Surface Ruptures of the March 2007 M 6+Earthquake Doublet on the Sumatran Fault. Bulletin of the Seismological Society of America, 102 (6), 2356-2367. DOI:10.1785/0120110220

Irsyam, M., Sengara, I.W., Aldiamar, F., Widiyantoro, S., Triyoso, W., Kertapati, E., Natawidjaja, D.H., Meilano, I., Soehardjono, Asrurifak, and Ridwan, M., 2010. Peta Zonasi Gempa Indonesia. Kementerian Pekerjaan Umum. DOI: 10.1007/978-94-007-5675-5_3

Ito, T., Gunawan, E., Kimata, F., Tabei, T., Simons, M., Meilano, I., Agustan, Ohta, Y., Nurdin, I., and Sugiyanto, D., 2012. Isolating Along-Strike Variation in the Depth Extent of Shallow Creep and Fault Locking on the Northern Great Sumatran Fault. Journal of Geophysical Research, 117, B06409, DOI:10.1029/2011JB008940

Klinger, Y., 2010. Relation Between Continental Strike-Slip Earthquake Segmentation and Thickness of the Crust. Journal of Geophysical Research, 115. DOI: 10.1029/2009JB006550

McCaffrey, R., 1994. Dependence of Earthquake Size Distributions on Convergence Rates at Subduction Zones. Geophysical Research Letter, 21 (21), p. 2327-2330. DOI:10.1029/94GL02153

McCalpin, J.P., and Nelson, A.R., 2009. Introduction to Paleoseismology, In: McCalpin, J.P.(ed.), Paleoseismology - International Geophysics Series, 95, Elsevier. DOI: 10.1016/S0074-6142(09)95001-X

Natawidjaja, D.H. and Triyoso, W., 2007. The Sumatran Fault Zone - From Source to Hazard. Journal of Earthquake and Tsunami, 1 (1), p.21-47. DOI: 10.1142/S1793431107000031

Prawirodirdjo, L., Bock, Y., Genrich, J.F., Puntodewo, S.S.O., Rais, J., Subarya, C., and Sutisna, S., 2000. One Century of Tectonic Deformation Along the Sumatran Fault from Triangulation and Global Positioning System Surveys. Journal of Geophysical Research, 105 (B12), p.29,343-28,361. DOI:10.1029/2000JB900150

Rusydy, I., 2013. Belajar dari gempa 02 Juli 2013 (Kab. Bener Meriah dan Aceh Tengah). http://www.ibnurusydy.com/belajar-darigempa-2-juli-2013-kab-bener-meriah-danaceh-tengah.

Sieh, K. and Natawidjaja, D., 2000, Neotectonics of the Sumatran Fault, Indonesia. Journal of Geophysical Research, 105(B12), p.28295-28326. DOI: 10.1029/2000JB900120

Team, A., 2010. ASTER Global Digital Elevation Model (GDEM). http://gdem.ersdac. jspacesystems.or.jp/ index.jsp.USGS, 2013.6.1-magnitude quake strikes Indonesia’s Aceh: USGS. http://www.mysinchew.com/node/88279tid=37#sthash.s1Xq5KLj.dpuf


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