Results 31 to 40 of about 157,284 (285)
Atmosphere, 2023 The study presents seismogenic ULF (ultra-low-frequency) wave effects, as observed at our own new magnetic observatory at Asahi (geographic coordinates: 35.770° N, 140.695° E) in Chiba Prefecture.
M. Hayakawa +3 more
semanticscholar +1 more source
Atmosphere, 2023 In order to explore the correlation between earthquakes and ionospheric very low-frequency (VLF) electric field disturbances, this article uses VLF data observed by the China Earthquake Electromagnetic Satellite (CSES) to analyze very low-frequency ...
Zhong Li +6 more
doaj +1 more source
Geophysical Research Letters, 2023 Off Cape Muroto area, along the Nankai Trough in southwest Japan, is a typical area with adjacent occurrences of slow and megathrust earthquakes. High‐resolution monitoring of slow earthquakes is necessary to understand tectonic conditions.
Satoru Baba +7 more
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An attempt to delineate very low frequency electromagnetic signals associated with earthquakes [PDF]
Earth, Planets and Space, 2014 We report on our observation of pulse-like electromagnetic signals in the frequency range 1∼10 kHz that we associate with earthquakes. The severest difficulty in separating earthquake-associated VLF signals from those originating in lightning discharges stems from the circumstance that the latter signals are overwhelming in number compared with the ...
Asada, Toshi +3 more
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SPATIO-TEMPORAL EVALUATION OF LONG-TERM EARTHQUAKE EVENTS AND ITS CONTRIBUTION IN GENESIS OF TSUNAMI IN THE INDIAN OCEAN [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019 A very high magnitude earthquake (9.1 MW) triggered a devastating Tsunami in the Indian Ocean on 26th December 2004. The epicentre was located at 3.3° N, 95.8° E with a focal depth of ~30 km.
A. A. Khan, A. Kumar, A. Kumar, P. Lal
doaj +1 more source
Geological and frictional aspects of very‐low‐frequency earthquakes in an accretionary prism [PDF]
Geophysical Research Letters, 2013 AbstractVery‐low‐frequency earthquakes (VLFE) occur within accretionary prisms and near subduction plate boundaries at slip rates of 0.05–2 mm/s. However, the geological and frictional aspects of VLFE remain poorly understood. The thrusts in the Shimanto accretionary complex exhumed from source depths of VLFE are composed of quartz‐rich fault rocks ...
Tsubasa Saito +4 more
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Earth, Planets and Space, 2021 We estimate the hypocenter locations and the centroid moment tensor solutions of the shallow very-low-frequency earthquake (sVLFE) activity that occurred in the Kumano-nada region of the Nankai Trough megathrust zone in central Japan from December 2020 ...
Y. Yamamoto +4 more
semanticscholar +1 more source
Metamaterial foundation for seismic wave attenuation for low and wide frequency band
Scientific Reports, 2023 Metamaterials are periodic structures made by repeating a unit cell. Such a structure shows frequency-specific wave attenuation behaviour. In this work, a 2D metamaterial foundation is proposed for the seismic protection of buildings.
Arpan Gupta +3 more
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VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes
Sensors, 2007 It is recently recognized that the ionosphere is very sensitive to seismic effects,and the detection of ionospheric perturbations associated with earthquakes, seems to bevery promising for short-term earthquake prediction. We have proposed a possible use
Masashi Hayakawa
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A comprehensive dynamic source model of shallow very low-frequency earthquakes
, 2023 Abstract Very low-frequency earthquakes, which exhibit longer source durations and smaller stress drops than regular earthquakes of similar magnitude, possess abundant low-frequency energy but are depleted in high-frequency energy. The source processes that govern the occurrence of very low-frequency earthquakes remain unclear.
Xueting Wei +3 more
openaire +1 more source