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ULF/ELF ionospheric electric field and plasma perturbations related to Chile earthquakes
- Source :
- Advances in Space Research, Advances in Space Research, 2011, 47 (6), pp.991-1000. ⟨10.1016/j.asr.2010.11.001⟩, Advances in Space Research, Elsevier, 2011, 47 (6), pp.991-1000. ⟨10.1016/j.asr.2010.11.001⟩
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
Abstract
- International audience; LF/ELF electric field perturbations in the ionosphere have been widely observed by the satellites. In this paper, we develop a method of Logarithm Electric Field Intensity (LEFI) to automatically distinguish this kind of disturbances based on the spectrum intensity and its damping exponent with frequency in electromagnetic signals. This method is applied to DEMETER data processing around Chile earthquakes with magnitude larger than 6.0. It is found that 2/3 earthquakes have shown obvious ULF/ELF electric field perturbations in this region. The temporal and spatial distributions of electron density and temperature were compared with that of electric field, which proved the existence of irregularities above epicentral area. Finally, the coupling mechanism of earthquake-ionosphere is discussed based on multi-parameter analysis
- Subjects :
- Atmospheric Science
Electron density
010504 meteorology & atmospheric sciences
Logarithm
Aerospace Engineering
Perturbation (astronomy)
DEMETER
Ionospheric irregularity
010502 geochemistry & geophysics
01 natural sciences
Physics::Geophysics
Electric field
Space research
ULF/ELF electric field perturbation
0105 earth and related environmental sciences
Remote sensing
Electron distribution
Physics
Chile earthquake
Astronomy and Astrophysics
Plasma
Geophysics
[SDU]Sciences of the Universe [physics]
13. Climate action
Space and Planetary Science
Physics::Space Physics
General Earth and Planetary Sciences
Ionosphere
Subjects
Details
- ISSN :
- 02731177
- Volume :
- 47
- Database :
- OpenAIRE
- Journal :
- Advances in Space Research
- Accession number :
- edsair.doi.dedup.....b43c1fa2f0e6d83fca3197098c5d4627