Results 71 to 80 of about 5,324 (216)

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

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

SPAC: An alternative method to estimate earthquake site effects in Mexico City [PDF]

Geofísica Internacional, 2003
Microtremor recordings are a very useful tool for microzonation studies because of simple data acquisition and analysis. The Spatial Autocorrelation Method (SPAC) proposed by Aki (1957), may be used to constrain the velocity structure underlying the site
Jorge Aguirre González, Hortencia Flores Estrella   +1 more
doaj  

Simultaneous recordings of ocular microtremor and microsaccades with a piezoelectric sensor and a video-oculography system [PDF]

, 2013
Our eyes are in continuous motion. Even when we attempt to fix our gaze, we produce so called “fixational eye movements”, which include microsaccades, drift, and ocular microtremor (OMT).
Albano, Bahill, Balslev, Beer, Bengi, Bengi, Betta, Bojanic, Bolger, Bolger, Bridgeman, Carpenter, Collewijn, Collins, Ditchburn, Donaldson, Drysdale, Engbert, Engbert, Engbert, Engbert, Frens, Funke, Gauthier, Hafed, Hennig, Hopp, Laubrock, Luo, Macknik, Martinez-Conde, Martinez-Conde, Martinez-Conde, Martinez-Conde, Matin, McCamy, Møller, Optican, Optican, Otero-Millan, Otero-Millan, Pélisson, Riggs, Rine, Rolfs, Rolfs, Ryle, Sharpe, Sheahan, Snow, Stark, Troncoso, Troncoso, van Donkelaar, Wang, Weir, Weir, Yarbus, Zozor   +58 more
core   +1 more source

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

Shallow Microtremor Array Survey Using Miniature and Small Arrays: Strategy for Efficient and Feasible Dense Survey

Earth and Space Science
We investigated the applicability of miniature microtremor arrays with a radius of a few meters or less to shallow surveys (up to a few tens of meters). It is shown that the upper limit wavelength normalized by the seismometer separation distance s that ...
I. Cho, T. Nakazawa
doaj   +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

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

Valley of Mexico site response from non‐reference site approach

Earthquake Spectra, Volume 41, Issue 2, Page 1029-1059, May 2025.
We present a model for Valley of Mexico site response that is referenced to a 30 m time‐averaged shear wave velocity (VS30) of 760 m/s. This reference condition ensures compatibility with regional ground motion models (GMM) for Central America and Mexico (CAM), which were developed from an expanded version of the NGA‐Subduction (NGA‐Sub) database as ...
Victor Contreras, Jonathan P Stewart, Juan M Mayoral, Xyoli Pérez‐Campos   +3 more
wiley   +1 more source

Site amplification in the Kathmandu Valley during the 2015 M7.6 Gorkha, Nepal earthquake [PDF]

, 2016
The 25th April 2015 M7.6 Gorkha earthquake caused significant damage to buildings and infrastructure in both Kathmandu and surrounding areas as well as triggering numerous, large landslides. This resulted in the loss of approximately 8600 lives.
,, Burton, P, Datla, S, Dejong, M, Fenton, C, Franco, G, Gosh, B, Lloyd, T, Novellis, V, Tallett-Williams, S, Trieu, A, White, T, Whitworth, M, Wilkinson, S   +13 more
core   +1 more source