Article
Geochemistry & Geophysics
D. Albarello, M. Herak, E. Lunedei, E. Paolucci, A. Tanzini
Summary: The use of numerical models to connect observations of ambient vibrations with subsoil seismic properties has been investigated. Nine different models were tested on realistic subsoil configurations, and the resultant HVSR curves predicted by these models were found to be quite similar in shape and resonance frequencies. However, the amplitudes of the HVSR values corresponding to the resonance frequencies differed among the models. The variability in experimental HVSR amplitudes and uncertainty about the local seismo-stratigraphical profile make it difficult to score the computational models based on empirical observations. Therefore, the choice of the optimal numerical tool for forward HVSR modeling should be determined on a case-by-case basis.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Engineering, Civil
S. Vishal Gupta, Imtiyaz A. Parvez, Prosanta K. Khan
Summary: This study characterizes the site response of the Kashmir valley in the northwest portion of the Himalayan lap for the first time. Using microtremor measurements and array measurements, the study reveals the deep deposition and spatial heterogeneity within the valley, and extracts the dispersion characteristics of Rayleigh waves and one-dimensional shear wave velocity profiles. This research is important for site-specific seismic hazard and risk analysis of the valley.
EARTHQUAKE SPECTRA
(2023)
Article
Geochemistry & Geophysics
Hamdullah Livaoglu, Erman Senturk, Fadime Sertcelik
Summary: The study compares Fourier and response spectral ratios to estimate clear predominant periods and seismic site classes. Results show that response spectral ratios are more reliable for engineering purposes, especially at sites where Fourier spectra show superficial peaks.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Multidisciplinary Sciences
Mingzhen Wang, Lin Gao, Zailin Yang
Summary: The research proposes a method for rapid evaluation of seismic damage state of building structures through the coupling effect of structural displacement response and periodic characteristics. It includes a calculation formula for fundamental period, an assessment standard considering period variation, and an evaluation method. Validation results show that the method has high accuracy and good engineering practicability.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Civil
Alan Poulos, Eduardo Miranda
Summary: Correlations between spectral ordinates at different periods and damping ratios are important in seismic hazard computations. This study computes damping-dependent correlations using the NGA-West2 ground motion database. It is found that correlations increase as the damping ratio increases and as the period ratio departs from one. A regression model is fitted to simplify future computations.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2023)
Article
Acoustics
David Caballol, Alvaro P. Raposo, Francisco Gil Carrillo, Monica Morales-Segura
Summary: The researchers measured and analyzed ambient vibration in urban residential buildings, focusing on unidentified sources and their relationship with the color of the noise map and floor level. Random peak values of vibration were identified, with different rates at different colors of the noise map.
Article
Biochemical Research Methods
Hidehiko Honda, Masato Yamamoto, Satoru Arata, Hirokazu Kobayashi, Masahiro Inagaki
Summary: This study identified two wavenumber regions by recording the infrared absorption spectra of gases surrounding Staphylococcus aureus, using a decision tree-based machine learning algorithm for classification. The results demonstrate the potential effectiveness of using absorbance measurement within these wavenumber regions to detect Staphylococcus aureus.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Astronomy & Astrophysics
F. Zhang, L. Li, Z. Han, X. Gong
Summary: This study investigates the relationship between the known binary fraction and spectral absorption feature index in order to determine which indices are suitable for determining the binary fraction. The determination of the binary fraction is important in various studies related to binary star formation and population synthesis models. The study uses Galactic globular clusters as a sample and finds that certain spectral absorption feature indices have strong correlations with the binary fraction. The results can be used to eliminate the effects of metallicity, age, and dynamical evolution and improve the understanding of binary star formation and population synthesis models.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Acoustics
John Ragland, Felix Schwock, Matthew Munson, Shima Abadi
Summary: This paper analyzes acoustic data from 2015 to 2020 to identify prominent features in the Ocean Observatories Initiative (OOI) acoustic dataset in the north-east Pacific Ocean. The analysis reveals notable features such as volcanic and seismic activity, rain and wind noise, marine mammal vocalizations, and anthropogenic sound. The study presents long-term spectrograms, median time-series trends, and statistical metrics for different locations and spectral bands, showing varying trends over the course of six years.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Kenneth A. Macpherson, Juliann R. Coffey, Alex J. Witsil, David Fee, Stephen Holtkamp, Scott Dalton, Heather McFarlin, Michael West
Summary: This study utilizes data from 108 infrasound sensors to compute ambient infrasound noise levels for 2020 and develop new low- and high-noise models. The findings show that wind is the dominant factor affecting noise levels, with higher noise in winter months. Additionally, the study demonstrates that knowledge of land cover type and wind speed can help predict infrasound noise levels.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Biotechnology & Applied Microbiology
T. L. Bercel, S. A. Kranz
Summary: The recent advancement in LED technology has led to many incubator manufacturers and research labs switching to these more efficient, yet spectrally restricted, light sources. The study investigated the effects of different LED lights on phytoplankton growth, productivity, and cellular composition, showing changes in underlying cellular metabolism and acclimation responses to different light environments. The results suggest that LED light spectra can have implications on ecophysiological responses of phytoplankton species and should be considered when designing laboratory-based incubation experiments.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Engineering, Civil
Daniel Verret, Denis LeBoeuf
Summary: The study analyzed the dynamic characteristics of the dam by recording vibration frequency values in different directions and evaluating ambient noise measurements. The results showed the consistency between the values obtained using simple methods and advanced modal analysis. Additionally, numerical modal analysis of the 3D valley-dam system supported the plausibility of the vibration modes obtained from experimental synchronized ambient noise modal analysis.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Engineering, Geological
Shahabaldin Mazloom, Rola Assi
Summary: This study aims to estimate the vertical-to-horizontal pseudo-spectral acceleration ratios in the Eastern Canada seismic zone for Site Class C soils. The study found that the prescribed 2/3 V/H ratio in the National Building Code of Canada is overestimated for far-field areas and underestimated for near-field areas. The study computed the V/H ratios using records from historic earthquakes and calibrated them with available ground motion prediction equations compatible with Site Class C.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Weilai Wang, Guangyao Cai, Guijuan Lai, Mingfei Chen, Long Zhang
Summary: This study in North China reveals that high-frequency ambient noise is correlated with surrounding sedimentary thickness and population density. The reduction in noise level during the Spring Festival in 2019 and 2020, as well as the epidemic control period, is influenced by the sedimentary thickness and population density in the region.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Yves Quilfen, Jean-Francois Piolle, Bertrand Chapron
Summary: Satellite altimeters provide key measurements of sea surface height (SSH) for monitoring ocean dynamics. However, below a wavelength of 70 km, the signal-to-noise ratio (SNR) of altimeter measurements drops dramatically, posing challenges for analyzing small variations in SSH. This study develops a data-driven approach using empirical mode decomposition (EMD) and adaptive noise filtering to estimate noise-free sea level anomaly (SLA) signals. The method effectively resolves small-scale SLA variability and provides valuable insights for evaluating global small-scale kinetic energy distributions.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Giuseppe Tortorici, Gino Romagnoli, Sabrina Grassi, Sebastiano Imposa, Giuseppe Lombardo, Francesco Panzera, Stefano Catalano
ENVIRONMENTAL EARTH SCIENCES
(2019)
Article
Archaeology
Grassi Sabrina, Imposa Sebastiano, Patti Graziano, Boso Domenico, Lombardo Giuseppe, Panzera Francesco
JOURNAL OF CULTURAL HERITAGE
(2019)
Article
Geosciences, Multidisciplinary
F. Panzera, G. Romagnoli, G. Tortorici, S. D'Amico, M. Rizza, S. Catalano
JOURNAL OF APPLIED GEOPHYSICS
(2019)
Article
Geosciences, Multidisciplinary
Francesco Panzera, Sebastiano D'Amico, Emanuele Colica, Marco Viccaro
BULLETIN OF VOLCANOLOGY
(2019)
Editorial Material
Geochemistry & Geophysics
Laura Pecchioli, Francesco Panzera, Valerio Poggi
JOURNAL OF SEISMOLOGY
(2020)
Article
Geochemistry & Geophysics
Francesco Panzera, Paolo Bergamo, Donat Faeh
Summary: An amplification map was developed for Switzerland using macroseismic intensity observations and geophysical data, showing differences among geological/tectonic classes. Analysis of amplification factors and geological parameters establishes a foundation for the intensity prediction equation and macroseismic amplification map.
JOURNAL OF SEISMOLOGY
(2021)
Article
Engineering, Geological
Francesco Panzera, Giuseppe Tortorici, Gino Romagnoli, Graziana Marletta, Stefano Catalano
ENGINEERING GEOLOGY
(2020)
Article
Geochemistry & Geophysics
Francesco Panzera, Paolo Bergamo, Donat Fah
Summary: The national seismic networks of Switzerland consist of over 200 stations, with empirical amplification functions computed routinely after each earthquake. Geophysical measurements are used to estimate shear-wave velocity profiles and HVNR, with the correlation between HVNR and EAF assessed through canonical correlation. Predictions and reconstructions of EAF at station sites are made using two parallel methods, improving when geological and geophysical parameters are considered in addition to HVNR.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Miroslav Hallo, Walter Imperatori, Francesco Panzera, Donat Faeh
Summary: The physical properties of near-surface soil and rock layers are crucial in seismic site effects analysis, and can be inferred through non-linear inversion techniques. An alternative inversion technique within the Bayesian framework allows for the inference of posterior probability density in the model space.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Manuel Hobiger, Paolo Bergamo, Walter Imperatori, Francesco Panzera, Agostiny Marrios Lontsi, Vincent Perron, Clotaire Michel, Jan Burjanek, Donat Faeh
Summary: The paragraph discusses the construction and site characterization of new strong-motion stations for the Swiss Strong Motion Network renewal. Various geophysical and geotechnical methods are used for each station to model seismic-velocity profiles and assess liquefaction potential. The combination of different methods is shown to be beneficial for retrieving important seismic characteristics of the sites.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Correction
Geochemistry & Geophysics
Laura Pecchioli, Francesco Panzera, Valerio Poggi
JOURNAL OF SEISMOLOGY
(2021)
Article
Engineering, Geological
Francesco Panzera, Jonas Alber, Walter Imperatori, Paolo Bergamo, Donat Fah
Summary: This study establishes a 3D model of subsurface structures by combining noise recordings and shear-wave velocity profiles, and tests and verifies the accuracy of the model. The results show that ambient vibration techniques are powerful tools for reconstructing 3D models of the subsurface.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Veronica Antunes, Thomas Planes, Anne Obermann, Francesco Panzera, Sebastiano D'Amico, Adriano Mazzini, Alessandra Sciarra, Tullio Ricci, Matteo Lupi
Summary: Research on the Nirano Mud Volcano in Northern Italy revealed different types of high-frequency drumbeat signals present in the most active part of the mud volcano plumbing system. By using seismic methods, the source location of these drumbeats, originating from the migration of mud and gas inside the mud volcanic conduits, can be determined.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Francesco Panzera, Paolo Bergamo, Vincent Perron, Donat Faeh
Summary: This study utilizes the dataset from the KiK-net network in Japan to investigate a strategy for predicting local earthquake amplification. The results show that the best prediction is obtained when using standard spectral ratios referred to local bedrock and the horizontal-to-vertical spectral ratio of earthquake coda.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Agostiny Marrios Lontsi, Manuel Hobiger, Francesco Panzera, Francisco J. Sanchez-Sesma, Donat Faeh
Summary: This study determines the shear-wave velocity profiles at two strong-motion borehole stations in Switzerland by inverting microtremor H/V curves. The results show seasonal variabilities in H/V curves and the estimated velocity profiles compare well with independent estimates. The obtained seismic velocity profiles are used to model the theoretical 1D shear wave transfer function.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Geosciences, Multidisciplinary
Mohamed Khatif Tawaf Mohamed Yusof, Ahmad Safuan A. Rashid, Mohd Faisal Abdul Khanan, Muhammad Zulkarnain Abdul Rahman, Wardatun Ahmar Abdul Manan, Roohollah Kalatehjari, Ali Dehghanbanadaki
Summary: This study investigates the effects of climate change on landslide susceptibility mapping (LSM) using a case study on Penang Island in Malaysia. The results show that future rainfall and temperatures are expected to increase, especially under a higher climate change scenario. LSM can help local authorities identify critical areas for monitoring and responding to landslide risks caused by climate change.
PHYSICS AND CHEMISTRY OF THE EARTH
(2024)
Article
Geosciences, Multidisciplinary
Shivam Pandey, Ajay Singh, Anuj Kumar, Inderjeet Tyagi, Rama Rao Karri, Rama Gaur, Hamedreza Javadian, Monu Verma
Summary: This research compares the effectiveness of hydrothermally produced ZnO and SnO2 nanocatalysts in degrading p-nitrophenol, a noxious chemical in water. The study finds that ZnO catalyst has better degradation efficiency compared to SnO2 catalyst. Detailed investigation reveals the optimal conditions for degrading p-nitrophenol using ZnO photocatalysts.
PHYSICS AND CHEMISTRY OF THE EARTH
(2024)
Article
Geosciences, Multidisciplinary
Muhammad Farhan Ul Moazzam, Sudeep Thakuri, Ghani Rahman, Byung Gul Lee
Summary: This study explores the elevation dependent warming in the Indus River Basin and its impacts on cryospheric and hydrological changes. The results show significant warming trends in the Tmax and Tmin in the upper Indus Basin, with a more prominent trend observed during the winter season for Tmax. These consistent warming trends can have harmful impacts on the cryosphere of the region, leading to water scarcity and extreme droughts.
PHYSICS AND CHEMISTRY OF THE EARTH
(2024)
