03/17/2013 05:30:00 UTC

Comment Section

• This is a varSITI campaign event for ISEST and SPeCIMEN.

At the Sun the event had an M1.1 flare, erupting filament, type IV radio burst, fast halo CME. At Earth a shock, possible MC, SEP, and strong storm, Dst=-132. A TB case. Modeled by C-C Wu. [Added by D. Webb]

• Depressed density and temperature as well as decreasing velocity are indicative of a flux rope, but with the weak magnetic field it may just be the flank passing through the Earth. Clear shock signatures in temperature and velocity and total B, more of a gradual increase in density. (Hess)

• The shock arrival time at Wind is 2013-03-17 05:31 UT. The CME propagation from Sun to Earth can be very well modeled with ElEvo. This CME should have impacted Messenger at Mercury (at least with the shock) on early March 16; MESSENGER/Mercury are roughly 30 degrees west of the Sun-Earth line. (Moestl)
• I used the ElEvo model for the interplanetary shock propagation (Moestl et al. 2015 Nat. Comm.) with initial CME parameters of

launch time: March 15 2013 1100 UT speed: 1063 km/s at distance 25 Rs direction: W5 => this is the average of interplanetary directions by HI SSEF modeling from STEREO A and B, taken from the STEREO HI CME catalogue http://www.helcats-fp7.eu/catalogues/wp3_cat.html CME ids: HCME_B__20130315_01 HCME_A__20130315_02

ElEvo yields an arrival time at the Earth consistent with the observed one, with a drag parameter that is 0.11 (which is slightly lower than average) and a background solar wind of 400 km/s (=normal value). (Moestl)

Image Data

In-Situ Data

A combination of SWEPAM and MAG data from the ACE Satellite:

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The blue lines are an approximation of the CME cloud and the red line denotes the shock.

Heliospheric Imager Data

Video Data

AIA 171
AIA 193
HMI