Comparison between indices during geomagnetic disturbances
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2004
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| _version_ | 1876443367197376512 |
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| author | Patricia Fernández de Campra |
| author_facet | Patricia Fernández de Campra |
| contents | Comparison between indices during geomagnetic disturbances Patricia Fernández de Campra Marta Zossi de Artigas Ciencias de la Tierra polar cap index Geomagnetic storms geomagnetic indices geomagnetic substorms Auroral indices AE, AU, AL, and Troshichev index from Thule, PC (Polar Cap) are compared for geomagnetic disturbancesof different intensities. To identify perturbations, the indices Dst and AE have been used. Fourteen storms have been analyzed,with Dst index minimum value between 50 nT and 600 nT (86% of them are great storms). The correlation coefficient, r,between AE and PC is above 0.65 for all storms analyzed. For AL index the correlation values are close to those of AE; but r is lowfor AU index. Thirty-five substorms were identified, with AE maximum values between 271 nT and 2218 nT. Eighty-one percentof them have a correlation coefficient between AE and PC above 0.6 and 47% above 0.8. The values obtained do not depend ondisturbance intensity. The results suggest that PC index can be used as a fast indicator of global magnetic activity in the auroraloval even during great disturbances. 2004 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56843115 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.43 |
| format | Artículo científico |
| id | redalyc_56843115 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Comparison between indices during geomagnetic disturbances Patricia Fernández de Campra Ciencias de la Tierra polar cap index Geomagnetic storms geomagnetic indices geomagnetic substorms Comparison between indices during geomagnetic disturbances Patricia Fernández de Campra Marta Zossi de Artigas Ciencias de la Tierra polar cap index Geomagnetic storms geomagnetic indices geomagnetic substorms Auroral indices AE, AU, AL, and Troshichev index from Thule, PC (Polar Cap) are compared for geomagnetic disturbancesof different intensities. To identify perturbations, the indices Dst and AE have been used. Fourteen storms have been analyzed,with Dst index minimum value between 50 nT and 600 nT (86% of them are great storms). The correlation coefficient, r,between AE and PC is above 0.65 for all storms analyzed. For AL index the correlation values are close to those of AE; but r is lowfor AU index. Thirty-five substorms were identified, with AE maximum values between 271 nT and 2218 nT. Eighty-one percentof them have a correlation coefficient between AE and PC above 0.6 and 47% above 0.8. The values obtained do not depend ondisturbance intensity. The results suggest that PC index can be used as a fast indicator of global magnetic activity in the auroraloval even during great disturbances. 2004 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56843115 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.43 |
| title | Comparison between indices during geomagnetic disturbances |
| topic | Ciencias de la Tierra polar cap index Geomagnetic storms geomagnetic indices geomagnetic substorms |
| url | https://www.redalyc.org/articulo.oa?id=56843115 |