Dependence of geomagnetic activity during magnetic storms on the solar wind parameters for different types of streams: 2. Main phase of storm

Details Dependence of geomagnetic activity during magnetic storms on the solar wind parameters for different types of streams: 2. Main phase of storm Dependence of geomagnetic activity during magnetic storms on the solar wind parameters for different types of streams: 2. Main phase of storm

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012ge%26ae..52...28n&link_type=abstract

Geomagnetism and Aeronomy, Volume 52, Issue 1, pp.28-36

Computer Science

Scientific paper

The paper analyses the development of the main phase of magnetic storms with Dst ≤ -50 nT, the interplanetary source of which consists of eight types of solar wind streams: magnetic clouds (MC, 17 storms); corotating interaction regions (CIR, 49 storms); Ejecta (50 storms); compressed region (Sheath) before Ejecta ShE (34 storms); the Sheath before a magnetic cloud ShMC (6 storms); all Sheath before all ICME, ShE + ShMC (40 storms); all ICME, MC + Ejecta (67 storms); and an indeterminate type of stream IND (34 storms). Threshold value estimates of the integral electric field sumEy to attain an intensity level of moderate ( Dst ≤ -50 nT) and strong ( Dst ≤ -100 nT) magnetic storms indicate a tendency toward their dependence on the type of magnetic storm source. It can be assumed that, on average, Sheath before ICME have threshold values 1.5 times less that ICME themselves.

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