An earthquake with a magnitude of 6.3 has occurred on May 27, 2006 and caused 5, 700 casualties. Investigation on damage for the Prambanan temple, housing and infrastructure was carried out in and around Yogyakarta, in central JAVA from June 5 to 8, 2006 The Prambanan complex sustained heavy damage, even this complex is located 40 km far north east of the epicenter. It is considered that the seismic wave was amplified due to the directivity effect and attacked Prambanan complex. Extensive damaged areas are distributed in the west side of the Imogiri fault. Serious damaged areas are limited in Bantul and in Klaten Regency. Damaged areas begin in Klaten Regency between Solo and Yogyakarta. In Bantul Regency, there were more than 4, 000 casualties. The infrastructure suffered comparatively light damages, however, housing sustained heavy damages and totally collapsed in Bantul Regency. In this report, reasons why the infrastructure sustained light damage while housing suffered heavily and as well as why damage areas are distributed unevenly are discussed.
The Iranian design code has been recently revised after the 2003 of Bam earthquake and currently proposes two standard shapes for the design response spectra. These propositions, however, were not constrained using actual strong motion data. In the present study, the high quality data from five recent earthquakes in Iran from 2002 until 2005 were used to evaluate the proposed design response spectra. A database of 696 strong motion records from 242 stations were employed. Using these records, the sites were classified and the response spectra together with their means were calculated for each site catagory. The mean response spectra used to review the shape of the proposed design response spectra. In particular, the plateau-PGA ratio level and the period interval where this plateau is constant.