Results 91 to 100 of about 3,488 (216)

Non-stability of the noise HVSR at sites near or on topographic heights

Geophysical Journal International, 2020
SUMMARYThe horizontal to vertical spectral ratio (HVSR) of seismic noise is often used to investigate site effects, and it is usually assumed to be a stable feature of the site considered. Here we show that such an assumption is not always justified, and may lead to incorrect conclusions.
Mario La Rocca, Giuseppe Davide Chiappetta, Anna Gervasi, Rocco Lorenzo Festa   +3 more
openaire   +1 more source

Seismic Structure of the Mid to Upper Crust at the Santorini‐Kolumbo Magma System From Joint Earthquake and Active Source Vp‐Vs Tomography

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Santorini volcano has a history of caldera‐forming eruptions, most recently in the Late Bronze Age, at 3.4 kya, and remains volcanically active. The Kolumbo submarine volcano, located 7 km to the northeast of Santorini, erupted in 1650 AD in a deadly phreatomagmatic eruption.
R. S. Hufstetler, E. E. E. Hooft, D. R. Toomey, B. P. VanderBeek, C. B. Papazachos, N. Chatzis   +5 more
wiley   +1 more source

Unveiling Cryosphere Dynamics by Distributed Acoustic Sensing and Data‐Driven Hydro‐Thermo Coupled Simulation

Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.
Abstract As global warming continues, the Earth's cryosphere is experiencing severe degradation. This study leverages a novel combination of distributed acoustic sensing (DAS) and artificial intelligence to monitor and decipher cryospheric dynamics. We have developed an advanced time‐lapse surface wave analysis workflow to capture shear wave velocity ...
Haoyuan Sun, Feng Cheng, Jianghai Xia, Jianbo Guan, Zefeng Li, Jonathan B. Ajo‐Franklin   +5 more
wiley   +1 more source

Nonlinear response of S-net sites in 2022 Mw7.4 off-Fukushima earthquake, Japan

Yantu gongcheng xuebao
To investigate the seismic nonlinear response of seafloor sites, this study analyzes S-net seafloor strong-motion records from the Mw7.4 off-Fukushima earthquake on March 16, 2022. Horizontal-to-vertical spectral ratios (HVSR) are compared between strong
HU Jinjun 1, 2, LI Jianhua 1, 2, CUI Xin 1, 2
doaj   +1 more source

Progressive Layer Stripping Analysis for HVSR Interpretation

The horizontal-to-vertical spectral ratio (HVSR) technique is widely used to determine site fundamental periods from ambient noise recordings, but relating the observed peak to a specific impedance contrast within layered soils remains challenging. This paper presents an enhanced implementation of hvstrip-progressive, a Python package for forward HVSR ...
Fathizadeh, Mersad, Wood, Clinton M., Kianfar, Hosna   +2 more
openaire   +2 more sources

A STUDY OF MICROTREMOR HVSR IN THE RIO-ANTIRIO AREA, (GREECE)

Bulletin of the Geological Society of Greece, 2017
Horizontal to Vertical Spectral Ratio (HVSR) method has been applied on ambient noise records at the Rio- Antirio area (central Greece). The dataset used was recorded during 7 days by 12 temporary seismic stations deployed in the area. The stations were laid out along a profile and their interval was approximately 500m.
Norda, M.E., Prapiga, A., Paraskevopoulos, P., Tselentis, G.A   +3 more
openaire   +3 more sources

Vulnerability Analysis of Andalas University Library Building Using Microtremor HVSR Method

Journal of the Physical Society of Indonesia
This research aims to analyze the vulnerability of the Andalas University Library UPT Building which is located in an earthquake-prone area using the microtremor HVSR method. Measurements were taken at 20 points on each floor of the building to determine
Ahmad Fauzi Pohan, Yunita Putri, Nopra Algusduri, Keisyah Putri Islami, Intan Fitri, Gusti Fiona, Abdul Fadhila Deshafa, Rahmad Fajri, Yuni Erawati, Rika Amalya Rahmah, Azani Jannah, Fauzan Surya Nanda, Febriwati Zai   +12 more
doaj   +1 more source

On higher order estimates in quantum electrodynamics [PDF]

, 2009
We propose a new method to derive certain higher order estimates in quantum electrodynamics. Our method is particularly convenient in the application to the non-local semi-relativistic models of quantum electrodynamics as it avoids the use of iterated ...
Matte, Oliver
core   +1 more source

Local Site Effects Evaluation Using Microtremor Measurements at North Side of Pandan Mountain

Journal of Physics: Theories and Applications, 2017
Disaster mitigation has been undertaken to reduce the impact of loss or damage caused by the earthquake. For disaster mitigation purpose, it is necessary to conduct a local geological assessment.
Samsul Hidayat, Dwa Desa Warnana, Sorja Koesuma, C Cari   +3 more
doaj   +1 more source

Potensi Likuifaksi Berdasarkan Nilai Ground Shear Strain (GSS) di Kecamatan Prambanan dan Kecamatan Gantiwarno Kabupaten Klaten Jawa Tengah [PDF]

, 2017
Telah dilakukan penelitian tentang potensi likuifaksi berdasarkan nilai Ground Shear Strain (GSS) di Kecamatan Prambanan dan Kecamatan Gantiwarno Kabupaten Klaten Jawa Tengah. Penelitian ini bertujuan untuk mengetahui nilai GSS di Kecamatan Prambanan dan
Budi Wibowo, Nugroho, Yulistiani, Yulistiani   +1 more
core