Ionospheric evidence of the May 1960 earthquake over Concepción?
For many years relations between seismic activity and associated ionospheric changes have been studied. Particularly, the possibility to identify ionospheric precursors of large earthquakes has been regarded as a specific goal for eventual obvious very valuable practical use. This paper first analys...
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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México, Instituto de Geofísica
2008-07-01
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| Series: | Geofísica Internacional |
| Subjects: | |
| Online Access: | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2008/03/foppiano.pdf |
| _version_ | 1797725823989448704 |
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| author | M. Stepanova K. Bataille E. M. Ovalle A. J. Foppiano |
| author_facet | M. Stepanova K. Bataille E. M. Ovalle A. J. Foppiano |
| author_sort | M. Stepanova |
| collection | DOAJ |
| description | For many years relations between seismic activity and associated ionospheric changes have been studied. Particularly, the possibility to identify ionospheric precursors of large earthquakes has been regarded as a specific goal for eventual obvious very valuable practical use. This paper first analyses foF2 observations over Concepción (36.8°S; 73.0°W) prior to the two very large Chile earthquakes of 21 and 22 May 1960, using the same procedure of Chuo et al. (2002) for the September 1999 Taiwan earthquake. Then it reports results from processing foF2 values in two different ways, namely, using direct estimations of reference geomagnetic quiet-day diurnal variation of foF2 and using an empirical model that filters known dependencies of foF2 on solar and geomagnetic activities for Concepción (Arriagada and Foppiano, 1999). It is shoof observed foF2 values lead to different conclusions regarding possible ionospheric precursors. |
| first_indexed | 2024-03-12T10:36:46Z |
| format | Article |
| id | doaj.art-90793c17e6a040df80201e0799e12c48 |
| institution | Directory Open Access Journal |
| issn | 0016-7169 |
| language | English |
| last_indexed | 2024-03-12T10:36:46Z |
| publishDate | 2008-07-01 |
| publisher | Universidad Nacional Autónoma de México, Instituto de Geofísica |
| record_format | Article |
| series | Geofísica Internacional |
| spelling | doaj.art-90793c17e6a040df80201e0799e12c482023-09-02T08:37:50ZengUniversidad Nacional Autónoma de México, Instituto de GeofísicaGeofísica Internacional0016-71692008-07-01473179183Ionospheric evidence of the May 1960 earthquake over Concepción?M. StepanovaK. BatailleE. M. OvalleA. J. FoppianoFor many years relations between seismic activity and associated ionospheric changes have been studied. Particularly, the possibility to identify ionospheric precursors of large earthquakes has been regarded as a specific goal for eventual obvious very valuable practical use. This paper first analyses foF2 observations over Concepción (36.8°S; 73.0°W) prior to the two very large Chile earthquakes of 21 and 22 May 1960, using the same procedure of Chuo et al. (2002) for the September 1999 Taiwan earthquake. Then it reports results from processing foF2 values in two different ways, namely, using direct estimations of reference geomagnetic quiet-day diurnal variation of foF2 and using an empirical model that filters known dependencies of foF2 on solar and geomagnetic activities for Concepción (Arriagada and Foppiano, 1999). It is shoof observed foF2 values lead to different conclusions regarding possible ionospheric precursors.http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2008/03/foppiano.pdffoF2ionosphereearthquake precursorChile. |
| spellingShingle | M. Stepanova K. Bataille E. M. Ovalle A. J. Foppiano Ionospheric evidence of the May 1960 earthquake over Concepción? Geofísica Internacional foF2 ionosphere earthquake precursor Chile. |
| title | Ionospheric evidence of the May 1960 earthquake over Concepción? |
| title_full | Ionospheric evidence of the May 1960 earthquake over Concepción? |
| title_fullStr | Ionospheric evidence of the May 1960 earthquake over Concepción? |
| title_full_unstemmed | Ionospheric evidence of the May 1960 earthquake over Concepción? |
| title_short | Ionospheric evidence of the May 1960 earthquake over Concepción? |
| title_sort | ionospheric evidence of the may 1960 earthquake over concepcion |
| topic | foF2 ionosphere earthquake precursor Chile. |
| url | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2008/03/foppiano.pdf |
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