Adrin Tohari, Khori Sugianti, Eko Soebowo


ABSTRACT The September 30, 2009 Padang earthquake has resulted in damages to infrastructures and buildings and a death toll of 383 in Padang City. Numerous liquefaction and ground deformations caused by the earthquake were particularly evidence in the areas few kilometers from the coast. The paper presents results of the previous field geotechnical investigations of liquefaction potential and the recent liquefaction observations in Padang City. A microzonation map was created using the data from liquefaction potential analyses and liquefaction potential indexes. The predicted liquefaction susceptibility zones showed a good agreement with site observations. The assessment suggests that the liquefaction susceptibility decreases to the northeast away from the coastal line.


the 2009 Padang earthquake, geotechnical investigation, liquefaction index, liquefaction analysis, microzonation

Full Text:



Atkinson, G.M., and Boore, D.M. (2003), “Em-pirical Ground Motion Relations for Sub-duction-Zone Earthquakes and Their Ap-plication to Cascadia and Other Regions”, Bulletin SSA, 93, 1703-1729.

EERI (2009), “The Mw 7.6 Western Sumatra Earthquake of September 30, 2009”, Spe-cial Earthquake Report — December 2009.

Iwasaki, T., Tokida, K., Tatsuoka, F., Watanabe, S., Yasuda, S.,and Sato H. (1982). Micro-zonation for Soil Liquefaction Potential Using Simplified Methods, Proc. 3rd Int. Earthquake Microzonation Conference, Seattle, WA, vol. III, 1319–30.

Kastowo, Gerhard, W. Leo, Gafoer, S. dan Amin, T.C. 1996. Peta Geologi Lembar Padang. Skala 1: 250.000. PPPG/GRDC-Bandung, Indonesia.

McCaffrey, R. (1992), “Oblique Plate Conver-gence, Slip Vectors, and Forearc Deforma-tion”, J. Geophys. Res., 97, 8905-8915.

Prawirodirdjo, L., Bock, Y., Genrich, J.F., Punto-dewo, S. S. O., Rais, J., Subarya, C., and Sutisna, S.(2000), “One Century of Tec-tonic Deformation Along the Sumatran Fault From Triangulation and Global Posi-tioning System Surveys”, J. Geophys. Res., 105, 28,343-28,363.

Robertson, P.K., and Wride, C.E. (1998). "Eva-luating Cyclic Liquefaction Potential Us-ing the Cone Penetration Test", Canadian Geotechnical Journal, 35 (3), 442-459.

Sakorlak (2009). “Recapitulation of West Suma-tra EQ Impacts - Friday, October 23”, cir-culated by UN OCHA, Sumatra.

Seed, H.B., and Idriss, I.M. (1971), "Simplified Procedure for Evaluating Soil Liquefac-tion Potential," J. Soil. Mech. Foundat. Div., ASCE , 97 (SM9), 1249-1273.

Sieh, K. (2009), “Padang Earthquake Struck at Edge of Zone Where Much Bigger Quake is Expected”, http://www.earthobservato

Sieh, K., and Natawidjaja, D. (2000), “Neotec-tonics of the Sumatran Fault, Indonesia”, J.Geophys. Res., 105, 28,295-28,326.

Tohari, A., Soebowo, E., Daryono, M. D., Anwar, H. Z., Kumoro, Y., Wibowo, S., Galih, D. R., and Rahardjo, P. P. (2006), “Assessment of Liquefaction Potential Due to Earthquake for Padang City”, Research Report, Research Center for Geotechnolo-gy, Bandung, 41 p (in Indonesian).

Tohari, A., Damayanti, M., and Sugianti, K. (2008), “Engineering Geological Survey in Coastal Area of Padang City: Liquefac-tion potential and susceptibility, and quali-ty of water resources”, Research Report, Research Center for Oceanography, Ban-dung, 67 p (in Indonesian).

Youngs, R. R., Chiou, S.-J., Silva W. J., and Humphrey, J. R. (1997), “Strong Ground Motion Attenuation Relationships for Subduction Zone Earthquakes,” Seismo-logical Research Letters, 68, 58-73.



  • There are currently no refbacks.

Copyright (c) 2011 Adrin Tohari, Khori Sugianti, Eko Soebowo

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Copyright of Riset Geologi dan Pertambangan (e-ISSN 2354-6638 p-ISSN 0125-9849). Powered by OJS


Indexed by:



Plagiarism checker: