RT info:eu-repo/semantics/article
T1 Solar and interplanetary triggers of the largest Dst variations of solar cycle 23
A1 Cerrato Montalbán, Yolanda
A1 Saiz Villanueva, María Elena
A1 Cid Tortuero, Consuelo
A1 Gonzalez , W. D.
A1 Palacios Hernández, Judith
K1 Solar physics
K1 Astrophysics
K1 Astronomy
K1 Magnetic fiels
K1 Geomagnetic storms
K1 Fisica
K1 Physics
AB We present the results of an investigation from the Sun to the Earth of the sequence of events that caused major Dst decreases (DeltaDst ≤ -100 nT during one hour) that occurred during 1996&-2005. These events are expected to be better related to GIC  (geomagnetic induced currents) events, than those events where any geomagnetic index  is far from its quiet time value. At least one full halo CME with a speed on the plane of  sky above 900 km/s participates in every studied event. The seven events were triggered  by interplanetary signatures which arise as a consequence of interaction among different  solar ejections. The interaction arises at different stages from the solar surface, between  segments of a filament, to the interplanetary medium, appearing as ejecta or MultiMCs  (multiple-magnetic cloud). In other cases, shock waves overtake or compress previous  ICMEs and at other times the interaction appears also between MCs (magnetic clouds)  and streams.
SN 1364-6826
YR 2012
FD 2012-01-01
LK http://hdl.handle.net/10017/29274
UL http://hdl.handle.net/10017/29274
LA eng
NO Ministerio de Ciencia e Innovación
DS MINDS@UW
RD 31-ene-2023