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SUMMARY:Photospheric and Chromospheric Magnetic Field Evolution during the
  X1.6 Flare in NOAA 12192
DTSTART;VALUE=DATE-TIME:20230510T123500Z
DTEND;VALUE=DATE-TIME:20230510T125000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115654Z
UID:indico-contribution-327@meetings.aip.de
DESCRIPTION:Speakers: Fabiana Ferrente (University of Catania)\nThe X1.6 f
 lare observed on 22 October 2014 was one of the strongest flares observed 
 in the complex active region NOAA 12192. We report on observations acquire
 d in the Fe I 617.30 nm and Ca II 854.2nm line profiles by the Interferome
 tric BIdimensional Spectropolarimeter (IBIS) immediately after the peak of
  the X1.6 flare. We focused on the chromospheric signals and studied the t
 emporal variation of the line of sight (LOS) magnetic field\, using the We
 ak-Field Approximation (WFA). Our results show that stepwise variations oc
 curred at specific locations along the eastern flare ribbon\, during the t
 ail of the flare impulsive phase. This result was validated by the STiC in
 version of the pixels used for the WFA analysis. We also investigated the 
 photospheric magnetic field obtaining that the LOS magnetic field did not 
 exhibit the same stepwise changes observed in the chromosphere in the sele
 cted pixels. Finally\, we found no clear evidence of changes along the pol
 arity inversion line around a magnetic polarity intrusion\, which is almos
 t cospatial to the area affected by the initial energy release.\n\nhttps:/
 /meetings.aip.de/event/24/contributions/327/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/327/
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