2026-09-21T04:01:20Z https://meral.edu.mm/oai

oai:meral.edu.mm:recid/291 2021-12-13T00:39:24Z 1582963788001:1582966668038 user-ydbu

Estimation of Sedimentary Layered Media at Prambanan Area, Yogyakarta Indonesia Pyi Soe Thein Subagyo Pramumijoyo In this study, we investigated the sedimentary layered media at Prambanan area, Yogyakarta. Several powerful earthquakes have struck the Opak River Fault during recent years. An earthquake occurred at Sengir village, Prambanan District, Yogyakarta on May 27, 2006, and caused several casualties. Following the event, we conducted a microtremor survey to estimate the shaking intensity distribution during the earthquake. We performed single observations of microtremor at 124 sites in Prambanan area. We also conducted 2-site bore holes investigation to gain a representative determination of the soil condition of subsurface structures in Prambanan. From the Standard Peneration Tests (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 0.95 to 1.92 s and the frequency are in the range of 0.48 to 1.19 Hz. By making these observations, we can obtain a relationship between predominant periods, frequency, general soil types and peak ground acceleration. The results enabled us to estimate the site-dependent shaking characteristics of earthquake ground motion. 2019 http://hdl.handle.net/20.500.12678/0000000291 https://meral.edu.mm/records/291