منابع مشابه
ULF Geomagnetic Changes Associated with Large Earthquakes
329 1 Marine Biosystems Research Center, Chiba University, Inage, Chiba, Japan *Corresponding author address: Prof. Katsumi Hattori, Marine Biosystems Research Center, Chiba University, Inage, Chiba, Japan; E-mail: [email protected] Despite its extreme importance and years of effort, practical short-term earthquake prediction still remains to be seen. However, research in earthquake...
متن کاملVariations of phase velocity and gradient values of ULF geomagnetic disturbances connected with the Izu strong earthquakes
Results of study of anomaly behavior of amplitudes, phase velocities and gradients of ULF electromagnetic disturbances (F = 0.002 – 0.5 Hz) before and during a seismic active period are presented. Investigations were carried out in Japan (Izu and Chiba peninsulas) by two groups of magnetic stations spaced apart at a distance ∼140 km. Every group (magnetic gradientometer) consists of three 3comp...
متن کاملOptimal Transmission Line Switching under Geomagnetic Disturbances
In recent years, there have been increasing concerns about how geomagnetic disturbances (GMDs) impact electrical power systems. Geomagnetically-induced currents (GICs) can saturate transformers, induce hot spot heating and increase reactive power losses. These effects can potentially cause catastrophic damage to transformers and severely impact the ability of a power system to deliver power. To...
متن کاملDisturbances in the US electric grid associated with geomagnetic activity
Large solar explosions are responsible for space weather that can impact technological infrastructure on and around Earth. Here, we apply a retrospective cohort exposure analysis to quantify the impacts of geomagnetic activity on the US electric power grid for the period from 1992 through 2010. We find, with more than 3r significance, that approximately 4% of the disturbances in the US power gr...
متن کاملPrincipal component analysis and singular spectrum analysis of ULF geomagnetic data associated with earthquakes
In order to extract any ULF signature associated with earthquakes, the principal component analysis (PCA) and singular spectral analysis (SSA) have been performed to investigate the possibility of discrimination of signals from different sources (geomagnetic variation, artificial noise, and the other sources (earthquake-related ULF emissions)). We adopt PCA to the time series data observed at c...
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ژورنال
عنوان ژورنال: Solnechno-Zemnaya Fizika
سال: 2020
ISSN: 2712-9640
DOI: 10.12737/szf-64202012