Open Access

Fig. 8


Download original image

The Dst index, and solar wind magnetic field (in GSE coordinates) and plasma parameters, for the July 15, 2012, geomagnetic storm with minimum Dst = −133 nT, associated with passage of a magnetic cloud with a southward magnetic field (BZ < 0). The bottom panel shows the solar wind proton temperature (Tp, black) with the “expected” temperature (Texp, red) superposed. Texp is inferred from the Tp – solar wind speed relationship found in “normal” solar wind using the observed solar wind speed. The black shaded region indicates where Tp ≤ 0.5 Texp, which is a frequent feature of magnetic clouds and other interplanetary coronal mass ejections (see Richardson & Cane 1995 for further details). OMNI 1-min solar wind data are shown; the fluctuations near shock passage are artifacts of the data mapping from the ACE spacecraft.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.