| Penulis/Author |
PYI SOE THEIN (1) ; Prof. Dr. Ir. Subagyo Pramumijoyo, DEA., IPU. (2); Prof. Dr. Kirbani Sri Brotopuspito (3); JUNJI KIYONO (4); Prof. Dr.Eng. Ir. Wahyu Wilopo S.T., M.Eng., IPM. (5); Ir. Salahuddin, S.T., M.Sc., Ph.D., IPM. (6); Dr.Eng. Ir. Agung Setianto, S.T., M.Si., IPM. (7) |
| Abstrak/Abstract |
In this study, we investigated the underground structure at Prambanan area, Yogyakarta. We performed single observations of microtremor at 124 sites in Prambanan area. The results enabled us to estimate the site dependent shaking characteristics of earthquake ground motion. We also conducted 2-site bore holes investigation to gain a representative determination of the soil condition of subsurface structures in Prambanan. From the SPT of borehole observations, the prambanan area corresponds to relatively soil condition with Vs ? 298 m/s, the predominant periods due to horizontal vertical ratios (HVSRs) are in the range of 0.48 to 1.19 s and the frequency are in the range of 0.95 to 1.92 Hz. By making these observations, we can obtain a relationship between the predominant periods, frequency and distribution of the first layer thickness of the sediment. |
