Results 91 to 100 of about 32,509 (276)

Vertical gravity gradient modeling and its influence on gravity datum transfer

Geodesy and Geodynamics
In the past, the free-air gradient −308.6 × 10−8 s−2 was used as the vertical gravity gradient of the measuring point in gravity data processing, which resulted in inaccurate instrument height corrections.
Tianxiang Zhou, Hongbo Tan, Guangliang Yang, Rugang Xu, Xinlin Zhang, Jiapei Wang, Sheng Liu, Hengzhou Meng, Ziheng Chen   +8 more
doaj   +1 more source

Evolution of Summit Magma Pressure During the 2018 Caldera Collapse at Kīlauea Volcano

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract We utilized geodetic data from the 16 May to 4 August 2018 caldera collapse sequence to refine the geometries and pressure evolution of two summit reservoirs at Kīlauea volcano: the shallower Halema‘uma‘u (HMM) and deeper South Caldera (SC) reservoirs.
Eric Berg, Taiyi A. Wang, Elizabeth Wig, Paul Segall, Kyle Anderson   +4 more
wiley   +1 more source

Identification of expected seismic activity areas by forecasting complex seismic-mode parameters in Uzbekistan

Geodesy and Geodynamics, 2018
In this paper, the author proposed a methodology to reveal expected seismic activation places for coming years by a complex of forecasting parameters of a seismic mode.
T.U. Artikov, R.S. Ibragimov, T.L. Ibragimova, M.A. Mirzaev   +3 more
doaj   +1 more source

Moment Tensor Inversion Reveals Diverse Mechanisms for Icequakes in Ross Ice Shelf Rift WR4

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Prior studies have cataloged thousands of icequakes at Ross Ice Shelf (RIS) Western Rift 4 (WR4) and linked them to tidal cycles, thermal stress, and temperature fluctuations. Building on this foundation, we apply a full moment tensor inversion using Green's functions for a layered firn, ice, water and sediment model.
Farzaneh Aziz Zanjani, Douglas A. Wiens, Michael E. Wysession, Dougal D. Hansen, Richard C. Aster, A. A. Nyblade   +5 more
wiley   +1 more source

Complex Versus Parsimonious Site‐Based Stochastic Ground Motion Models: Which One Is Better?

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 14, Page 3714-3731, November 2026.
ABSTRACT Stochastic ground motion models (GMMs) provide a probabilistic representation of seismic input and are increasingly important for uncertainty quantification (UQ) in earthquake engineering. This study focuses on site‐based stochastic GMMs, which learn the statistical features of selected datasets of seismic records and generate statistically ...
Maijia Su, Mayssa Dabaghi, Marco Broccardo   +2 more
wiley   +1 more source

Influence of Site Amplification Approaches in PSRA: Insights From Five Different Cities

Earthquake Spectra, Volume 42, Issue 4, November 2026.
Regional and national seismic hazard models used in probabilistic seismic risk analysis often rely on generalized proxy‐based site terms to account for ground shaking amplification. This can result in coarse representations of site response, which can introduce bias or additional uncertainty in the associated risk results.
Julián Montejo, Vitor Silva, Bruno Pace, Marco Pagani   +3 more
wiley   +1 more source

Machine Learning Applications in Seismology

The comprehension of earthquakes and natural hazards, including volcanic eruptions and landslides, as well as explosions, through observational data is a pivotal activity within the field of seismology [...
Ke Jia, Shiyong Zhou
core   +2 more sources

An Examination of the Reasons for, and Variability of, the Differences Between Response Spectra and Pseudo Response Spectra

Earthquake Spectra, Volume 42, Issue 4, November 2026.
For many decades, it has been common practice to overlook the differences between response spectra and pseudo response spectra. This practice stems from analyses indicating that the average difference between response spectra and pseudo response spectra is negligible for a viscous damping ratio of 5%, which is near‐universally adopted.
Eric M. Thompson, David M. Boore
wiley   +1 more source

Long‐Term Earthquake Response in a Midrise Reinforced Concrete Building: Insights From Hybrid Seismic Monitoring

Earthquake Spectra, Volume 42, Issue 4, November 2026.
We present a multidecadal analysis of the seismic response of a midrise reinforced concrete (RC) building in Taipei, Taiwan, combining legacy strong‐motion accelerograph (SMA‐1) data with recent recordings from a dense array of low‐cost microelectromechanical systems (MEMS)‐based Quake Structural Integrity System (QSIS) sensors.
Utpal Kumar, Chin‐Hsiung Loh, Wen‐Tzong Liang, Kuo‐Fong Ma   +3 more
wiley   +1 more source

Frequency dependent attenuation of seismic waves for Delhi and surrounding area, India

Annals of Geophysics, 2015
The attenuation properties of Delhi & surrounding region have been investigated using 62 local earthquakes recorded at nine stations. The frequency dependent quality factors Qa (using P-waves) and Qb (using S-waves) have been determined using the ...
Babita Sharma, Prasantha Chingtham, Anup K. Sutar, Sumer Chopra, Haldhar P. Shukla   +4 more
doaj   +1 more source