Correlation analysis technique revealing ionospheric precursors of earthquakes
In this paper we focus on the variability of electron concentration in the ionosphere measured by ground based ionosondes and GPS receivers around the time of strong earthquakes. It has been detected and statistically proven that several days before the seismic shock the level of this variability in...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2004-01-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/4/697/2004/nhess-4-697-2004.pdf |
| _version_ | 1818909206683582464 |
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| author | S. A. Pulinets T. B. Gaivoronska A. Leyva Contreras L. Ciraolo |
| author_facet | S. A. Pulinets T. B. Gaivoronska A. Leyva Contreras L. Ciraolo |
| author_sort | S. A. Pulinets |
| collection | DOAJ |
| description | In this paper we focus on the variability of electron concentration in the ionosphere measured by ground based ionosondes and GPS receivers around the time of strong earthquakes. It has been detected and statistically proven that several days before the seismic shock the level of this variability increases at the station closest to the epicenter, a fact which can be regarded as precursory phenomenon. More precisely the localness of this specific kind of ionospheric variability is used for the correlation analysis of data of several observation points. The similarity of geographical location of the observation points leads to the similarity of ionospheric variations registered at these sites during both quiet and disturbed geomagnetic conditions, except in the case of those located at the seismoactive zone. As a rule, the local anomalies in the F2 layer and TEC accompanying the preparation of strong earthquakes show themselves in the breaking of the mutual correlation of the critical frequencies <i>f<sub>o</sub>F2</i> or TEC between stations situated in and outside the seismic zone. The precursory phenomenon appears 1 to 7 days before the time of the seismic shock. |
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| format | Article |
| id | doaj.art-eb49b8a6060e4e2f91ef414dd9824cb3 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-19T22:23:14Z |
| publishDate | 2004-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-eb49b8a6060e4e2f91ef414dd9824cb32022-12-21T20:03:34ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812004-01-0145/6697702Correlation analysis technique revealing ionospheric precursors of earthquakesS. A. PulinetsT. B. GaivoronskaA. Leyva ContrerasL. CiraoloIn this paper we focus on the variability of electron concentration in the ionosphere measured by ground based ionosondes and GPS receivers around the time of strong earthquakes. It has been detected and statistically proven that several days before the seismic shock the level of this variability increases at the station closest to the epicenter, a fact which can be regarded as precursory phenomenon. More precisely the localness of this specific kind of ionospheric variability is used for the correlation analysis of data of several observation points. The similarity of geographical location of the observation points leads to the similarity of ionospheric variations registered at these sites during both quiet and disturbed geomagnetic conditions, except in the case of those located at the seismoactive zone. As a rule, the local anomalies in the F2 layer and TEC accompanying the preparation of strong earthquakes show themselves in the breaking of the mutual correlation of the critical frequencies <i>f<sub>o</sub>F2</i> or TEC between stations situated in and outside the seismic zone. The precursory phenomenon appears 1 to 7 days before the time of the seismic shock.http://www.nat-hazards-earth-syst-sci.net/4/697/2004/nhess-4-697-2004.pdf |
| spellingShingle | S. A. Pulinets T. B. Gaivoronska A. Leyva Contreras L. Ciraolo Correlation analysis technique revealing ionospheric precursors of earthquakes Natural Hazards and Earth System Sciences |
| title | Correlation analysis technique revealing ionospheric precursors of earthquakes |
| title_full | Correlation analysis technique revealing ionospheric precursors of earthquakes |
| title_fullStr | Correlation analysis technique revealing ionospheric precursors of earthquakes |
| title_full_unstemmed | Correlation analysis technique revealing ionospheric precursors of earthquakes |
| title_short | Correlation analysis technique revealing ionospheric precursors of earthquakes |
| title_sort | correlation analysis technique revealing ionospheric precursors of earthquakes |
| url | http://www.nat-hazards-earth-syst-sci.net/4/697/2004/nhess-4-697-2004.pdf |
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