Unusual behavior of Very Low Frequency signal during the earthquake at Honshu/Japan on 11 March, 2011

2014 ◽  
Vol 88 (10) ◽  
pp. 1013-1019 ◽  
Author(s):  
S Sasmal ◽  
S K Chakrabarti ◽  
S Ray
Keyword(s):  
Low Frequency ◽  
Unusual Behavior ◽  
Frequency Signal ◽  
Very Low Frequency

Some Rationale for the Unusual Behavior of the Dielectric Constant of Cu2O

1973 ◽  
Vol 51 (6) ◽  
pp. 680-685 ◽  
Author(s):  
F. L. Weichman
Keyword(s):  
Dielectric Constant ◽  
High Frequency ◽  
Low Temperatures ◽  
Low Frequency ◽  
Depletion Layer ◽  
Temperature Dependent ◽  
Unusual Behavior ◽  
Temperature Variations ◽  
Very Low Frequency ◽  
Semiconducting Material

The very low frequency dielectric constant in Cu2O varies over wide limits and is highly temperature dependent. At sufficiently low temperatures the dielectric constant for all samples reduces to the high frequency value of about 7.5. Small variations in the high frequency value are easily explained as being due to the known presence of copper crystals embedded in the semiconducting material. The low frequency and temperature variations will be related to the variation in the depletion layer formed around each copper inclusion. Calculations are based on highly oversimplified size, shape, and distribution of the copper inclusions.

Analysis of ground-based very low frequency signal recorded onboard CSES satellite

2021 ◽  
Author(s):  
Mohammed Y. Boudjada ◽  
Hans U. Eichelberger ◽  
Xuemin Zhang ◽  
Werner Magnes ◽  
Valery Denisenko ◽  
...  
Keyword(s):  
Low Frequency ◽  
Frequency Signal ◽  
Very Low Frequency

Detection of Sudden Ionospheric Disturbances due to Solar flares by monitoring the Very Low Frequency signal at Malda

2010 ◽  
Author(s):  
Nilmadhab Nandy ◽  
Achintya K. Chatterjee ◽  
Md. Washimul Bari ◽  
Asit K. Choudhury ◽  
Sandip K. Chakrabarti
Keyword(s):  
Solar Flares ◽  
Low Frequency ◽  
Ionospheric Disturbances ◽  
Frequency Signal ◽  
Very Low Frequency
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