CORRELATION OF SITE CONDITION - BUILDINGS DAMAGES – AND GROUND RUPTURE OF THE 27 MAY 2006 YOGYAKARTA EARTHQUAKE – CENTER JAVA

The 27 May 2006 earthquake produced a strike-slip ground rupture about ± 80 Km. long. It stretches along general N 220-245E direction from Desa Parangtritis – Distric Kretek- Kabupaten Bantul to Desa Prajinan, Distric Josonalan, Kabupaten Klaten. The sense of horizontal movement is left-lateral. Its epicenter lies within “the District Saden area” (?), Kabupaten Bantul and registered a magnitude of 6.3 (Ms) on the open ended Richter scale. The ground rupture was responsible for part of the damage inflicted by the earthquake. Hardest hit by rupturing are the Kampung Sengir, Piyungan, Srimartani, Derjo, Pathuk, Taji, Prambanan District. Many roads and one bridge were also cracked by the ground rupturing. Vibration triggered landslides and liquefaction and settling. Vibration was widely felt and its intensity varied with local ground conditions. Landslides affected Sengir. Liquefaction and settling damaged mostly the river deposits (flood plain) areas in and near Taji, Prajinan and Srimartani.

Post earthquake study of the ground ruptures provides additional insights into the possibilities that might be expected in case the Melange Cretaceous-Tertiary Fault (Kertapati, 1999) and Opak Fault or other faults move again. Future activities of similar magnitudes along the ground rupture will most probably follow the same trace. Structural controls that affected rupture propagation and arrest might provide us clues as to the size of the next earthquake and enable us to identify sites where high frequency energy inducing strong ground-motion might be expected along the trace.

Learn more about CORRELATION OF SITE CONDITION - BUILDINGS DAMAGES – AND GROUND RUPTURE OF THE 27 MAY 2006 YOGYAKARTA EARTHQUAKE – CENTER JAVA, you can download here