Results 61 to 70 of about 5,228 (199)

Frequency and Amplification for Assessing site Effects and PVS in the Padang City Railway

JIF (Jurnal Ilmu Fisika), 2023
The train uses a special line in the form of railroad tracks that produce vibrations during movement. This study aims to determine the type of soil layer and the peak particle velocity due to the train around the Padang City train line.
Ahmad Fauzi Pohan M.Si, Dwi Pujiastuti, Nadila Syarah, Nurul Annisa   +3 more
doaj   +1 more source

Seismic microzonation for Muscat region, Sultanate of Oman [PDF]

, 2016
Site characterization was carried out for Muscat region using the ambient noise measurements applying the horizontal-to-vertical spectral ratio (HVSR) technique and using active seismic survey utilizing the multichannel analysis of surface waves (MASW ...
Al-Habsi, Z., Al-Hashmi, S., Al-Jabri, K., Al-Rawas, G., Al-Saifi, M., Al-Toubi, K., Deif, A., El-Hady, S., El-Hussain, I., Mohamed, A. M. E., Sundararajan, N., Toksoz, M. Nafi   +11 more
core   +1 more source

The Soft Layer Thickness Estimation using Microtremor Measurement to Identify Landside Potential in Watukumpul, Central Java, Indonesia.

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2021
Watukumpul is an area that is prone to landslides, so determining the soft layer thickness is very important to identify the landslide potential. The soft layer thickness can be estimated using microtremor signal measurements which analyzed using the ...
Urip Nurwijayanto Prabowo, Akmal Ferdiyan, Ayu Fitri Amalia   +2 more
doaj   +1 more source

Comparative Study of Microtremor Analysis Methods

Pure and Applied Geophysics, 2001
During a multidisciplinary microzonation pilot project in the city of Heraklion (Crete, Greece), microtremor data were collected at the top of exploratory boreholes specifically designed for the purposes of the project, over a period of 5 days, for 4 h/day at 125 Hz (continuous recordings).
Diagourtas, D., Tzanis, A., Makropoulos, K.   +2 more
openaire   +2 more sources

Validating alternative methods to account for shallow site effects in hybrid broadband ground‐motion simulation of small‐magnitude earthquakes in New Zealand

Earthquake Spectra, Volume 41, Issue 5, Page 3914-3948, December 2025.
Proper incorporation of shallow site effects in hybrid broadband ground‐motion simulation is essential to improving predictions at soil sites. This paper validates and compares four methods to account for these effects in the predominantly linear regime, using 1446 ground motions from 213 small‐magnitude earthquakes (3.5≤MW≤5.0) recorded at 38 sites in
Felipe Kuncar, Brendon A Bradley, Christopher A de la Torre, Adrian Rodriguez‐Marek, Chuanbin Zhu, Robin L Lee   +5 more
wiley   +1 more source

Effects of Surface Geology on Seismic Ground Motion Deduced from Ambient-Noise Measurements in the Town of Avellino, Irpinia Region (Italy) [PDF]

, 2011
The effects of surface geology on ground motion provide an important tool in seismic hazard studies. It is well known that the presence of soft sediments can cause amplification of the ground motion at the surface, particularly when there is a sharp ...
Amanda J. Chamberlain, Benjamin J. Hayes, Catriona A. Millen, Christy J. Vander Jagt, Leah C. Marett, Majid Khansefid, Michael E. Goddard, Thuy T. T. Nguyen   +7 more
core   +3 more sources

Ocular microtremor measurement using laser-speckle metrology [PDF]

Journal of Biomedical Optics, 2013
We describe a novel, noninvasive measurement approach for recording a small involuntary tremor of the eye known as ocular microtremor. The method is based on measuring out-of-plane angular displacements of a target by using laser-speckle correlation of images recorded in the Fourier plane of a lens.
Emer, Kenny, Davis, Coakley, Gerard, Boyle   +2 more
openaire   +2 more sources

Evaluating Seismic Ambient Noise Techniques for Detecting Ice‐Bearing Rocks on the Moon

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract One of the primary objectives of upcoming lunar missions is to locate ice‐bearing rocks at the South Pole. While evidence for their presence exists, the exact distribution and quantity remain uncertain. In this study, we evaluate the potential of seismic ambient noise techniques—including seismic interferometry, H/V spectral ratios ...
S. Keil, M. Schimmel, H. Igel
wiley   +1 more source

Comparison of earthquake and microtremor ground motions in El Centro, California [PDF]

, 1973
Strong earthquake ground shaking has been investigated by the study of 15 events recorded in El Centro, California. The strong-motion records analyzed show that no simple features (e.g., local site conditions) govern the details of local ground shaking ...
Trifunac, M. D., Udwadia, F. E.
core  

A frequency‐domain beamforming procedure for extracting Rayleigh wave attenuation coefficients and small‐strain damping ratio from 2D ambient noise array measurements

Earthquake Spectra, Volume 41, Issue 2, Page 1333-1363, May 2025.
The small‐strain damping ratio plays a crucial role in assessing the response of soil deposits to earthquake‐induced ground motions and general dynamic loading. The damping ratio can theoretically be inverted for after extracting frequency‐dependent Rayleigh wave attenuation coefficients from wavefields collected during surface wave testing.
Aser Abbas, Mauro Aimar, Brady R Cox, Sebastiano Foti   +3 more
wiley   +1 more source