Abstract The 7.5 M w tectonic earthquake that hit Palu City on 28 September 2018 was followed by tsunami and liquefaction, triggered massive mudflows in Balaroa, Petobo, Jono Oge areas. This study focuses the generating factors of liquefaction such as condition soil lithology, depth water table, distance to focal mechanism, thickness soft sediment. Microtremor data, including Horizontal Vertica...

Abstract 1D velocity profiles at a strong motion station in the northern part of Kumamoto plain, Japan, were submitted Step-1 blind prediction exercise ground motions sixth international symposium on effects surface geology seismic (ESG6). Individual participants requested to estimate S-wave profile sedimentary layers from given data obtained by microtremor array explorations and surface-wave s...

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...

recordings of ambient noise or microtremors are increasingly used to find valuable information on soil in one dimension at a given site. ambient vibrations, which are assumed to be mainly composed of surface waves, can be used to determine the surface wave dispersion curve in order to retrieve shear wave velocity profile. in this regard, microtremors are usually recorded simultaneously in an ar...

Abstract Microtremor is recorded with a device that very sensitive to subsurface soil vibrations, unwanted noise frequency waves are often also included. For this reason, processing needs be done using filters can attenuate the noise. In previous research, signal decomposition was performed Interpolated Finite Impulse Response (IFIR) filter and resulted attenuation at desired value. Using MATLA...

uniform linear array (ula)-based tapped-delay line (tdl) structure has good performance metrics when the signal sources are located at the middle angles. it offers poor performance when the signal sources are close to the array endfire. in this paper, a new approach is proposed which offers higher performance and desired beamforming on tdl structure when the wideband uncorrelated radio sources ...

A new four elements compact antenna array is presented and discussed to achieve enhanced phase resolution without sacrificing the array output power. This structure inspired by the Ormia Ochracea’s coupled ears. The analogy between this insect acute directional hearing capabilities and the electrically compact antenna array is used to enhance the array sensitivity to direction of arrival estima...