Estimation of storm-time level of day-side wave geomagnetic activity using a new ULF index

Details Estimation of storm-time level of day-side wave geomagnetic activity using a new ULF index Estimation of storm-time level of day-side wave geomagnetic activity using a new ULF index

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ge%26ae..48..491k&link_type=abstract

Geomagnetism and Aeronomy, Volume 48, Issue 4, pp.491-498

Computer Science

5

94.30.Ms, 94.30.Lr, Magnetic Pulsations, Magnetic Storms, Substorms

Scientific paper

The level of wave geomagnetic activity in the morning and daytime sectors of auroral latitudes during strong magnetic storms with Dst min varying from -100 to -150 nT in 1995-2002 have been studied using a new ULF index of wave activity proposed in [Kozyreva et al., 2007]. It has been detected that daytime Pc5 pulsations (2-6 mHz) are most intense during the main phase of a magnetic storm rather than during the recovery phase as was considered previously. It has been indicated that morning geomagnetic pulsations during the substorm recovery phase mainly contribute to daytime wave activity. The appearance of individual intervals with the southward IMF B z component during the magnetic storm recovery phase results in increases in the ULF index values.

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