Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh43c..07m&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH43C-07
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7531] Solar Physics, Astrophysics, And Astronomy / Prominence Eruptions, [7924] Space Weather / Forecasting
Scientific paper
For two coronal mass ejections (CMEs) associated with interplanetary CMEs (ICMEs) causing moderate geomagnetic storms in 2010, we discuss properties such as interplanetary propagation, orientation and arrival time calculation. We study heliospheric images of the CMEs provided by STEREO / HI in combination with in situ observations by the Wind spacecraft near Earth. The 3-5 April 2010 event was the first fast (800 km/s) ICME including a magnetic cloud observed by both the STEREO/HI instruments and a near Earth spacecraft. During the subsequent geomagnetic storm (minimum Dst = -72 nT, maximum Kp = 8-), communication with the Galaxy 15 satellite was lost. Using forward modeling in combination with HI techniques and the in situ velocity, we show that the ICME did not decelerate much between Sun and Earth. Earth was not hit directly, but the ICME flank was responsible for a long storm growth phase. The magnetic cloud (MC) inside the ICME cannot be modeled with approaches assuming an invariant direction. These observations confirm the hypotheses that parts of ICMEs classified as (1) long-duration MCs or (2) magnetic-cloud-like (MCL) structures can be a consequence of a spacecraft trajectory through the ICME flank. The 1-4 Aug 2010 events consisted of several CMEs accompanied by multiple ICME signatures near Earth, responsible for a two-step geomagnetic storm. We discuss which of the ICMEs correspond to the flare/filaments/CMEs observed by STEREO/COR/HI and SDO HMI/AIA observed closer to the Sun. We apply reconstruction methods to estimate the local flux rope orientation and other properties. The ICME signatures are linked to HI observations of the CME fronts, which yields full CME kinematics between the Sun and Earth. STEREO Ahead HI1/2 images of the 3-5 April 2010 Earth-directed coronal mass ejection.
Biernat Helfried K.
Farrugia Charles J.
Galvin Antoinette B.
Kilpua E. K.
Moestl C.
No associations
LandOfFree
The CME/ICME relationship for the 3-5 April 2010 and Aug 1-4 2010 events does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The CME/ICME relationship for the 3-5 April 2010 and Aug 1-4 2010 events, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The CME/ICME relationship for the 3-5 April 2010 and Aug 1-4 2010 events will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1511011