The research has been conducted in the Gedongsongo manifestation area, Mount Ungaran Geothermal Field. This study aims to characterize shallow subsurface manifestations using microtremor data. Microtremor data were recorded Candi Village, Bandungan Subdistrict and Jubelan Sumowono Subdistrict, Semarang Regency. recording can be done directly a seismometer with three components. measurement is b...

Based on the observed strong-motion records of K-NET and KiK-net, we utilized 1,065 earthquake observation stations installed throughout Japan, gathering more than 140,000 recordings for weak motions with a peak ground acceleration (PGA) less 100 cm/s2 5,300 strong PGA cm/s2. These sites detected at least one recording value greater were used to quantify horizontal-to-vertical spectral ratio (H...

Abstract This study reports the geostatistical analysis of a set 40 single-station horizontal-to-vertical spectral ratio (HVSR) passive seismic survey data collected in Kathmandu basin (Nepal). The is characterized by heterogeneous sedimentary cover and complex geo-structural setting, inducing high spatial variability bedrock depth. Due to geological interpretation soil resonance periods derive...

Earthquake site responses or effects are the modifications of surface geology to seismic waves. How well can we predict (average over many earthquakes) at individual sites so far? To address this question, tested and compared effectiveness different estimation techniques in predicting outcrop Fourier separated using general inversion technique (GIT) from recordings. Techniques being evaluated (...

Provinsi Lampung memiliki kondisi geografis kompleks, dilewati jalur bukit Bukit barisan Barisan dan terletak diantara dua lempeng yaitu Indo-Australia Eurasia. juga merupakan wilayah yang dekat dengan Samudera Hindia pada zona Sesar Semangko (Sumatra Transform Fault Zone) terbentang dari Aceh sampai Teluk Semangka Lampung. Dengan demikian penataan pembangunan infrastruktur berbasis mitigasi ge...

Three widely-available surface wave measurement techniques, including two active-source methods, the Spectral Analysis of Surface Waves (SASW) method and the Multi-channel Analysis of Surface Waves (MASW) method, and one passive-source method, the Refraction Microtremor (ReMi) method, were applied at a complex-layered site. Dispersion relations were compared to one another. Outcomes from the MA...

it is well known that ground-shaking site effect caused by an earthquake can vary significantly within a small distance. this is because at sites having soft soil and/or topographic and basement undulations, seismic energy gets trapped, leading to amplification of vibration that may cause considerable damage to man-made structures. theoretical analysis and observational data have shown that eac...