Ref: CTALK-2019-0028

Automated EUV Wave Catalogue For Solar Cycle 23 And 24: EUV Global Wave Rotation Sense Follows Hale Magnetic Cycle

Podladchikova, Olena ; Vourlidas, Angelos ; Mierla, Marilena, ; West, Matthew ; d'Huys, Elke ; Stegen, Koen, ; O'Hara, Jenny ; Wauters, Laurence

Talk presented at 2nd China-Europe Solar Physics Meeting (CESPM 2019) on 2019-05-09

Abstract: EUV global waves are among the best and earliest signatures of geoeffective Coronal Mass Ejections. In this work, we present the automatically constructed EUV global coronal waves (EIT waves) catalogue, a result of the application of the Novel EIT wave Machine Observing (NEMO) tool on the EUV solar images archives covering the intervals: 1997 March–2010 February (provided by EIT/SOHO telescope), January 2008 - December 2010 (provided by EUVI/SECCHI/STEREO) and January 2011 - December 2018 (provided by SWAP/PROBA2). Thus, we have studied the EUV waves characteristics through the evolution of the 23th and 24th solar cycle. The NEMO statistics show that small-scale EUV waves(mini-CMEs), firstly detected with SECCHI data, unambiguously contribute to solar wind formation in the outer corona. The possibility that the size and the intensity of eruptive dimming follow a power-law distribution could indicate that mini-CMEs observed in EUV solar corona are not different from the larger well defined EUV global waves. The amplitude-velocity ratio has been found to be also invariant for the statistically significant number of the propagating EUV waves fronts. It is demonstrated that the sense of EUV waves fronts rotation (clockwise or counter-clockwise) changes when initiated in different hemispheres (North or South). This sense of wave front rotation changes during solar maximum period, depending on the direction of the main magnetic sunspot of the active region (where event has been initiated) and follows Hale magnetic cycle. The consistent pattern of EUV waves rotation may contribute to the understanding of the future direction of the CME propagation.

The record appears in these collections:
Conference Contributions & Seminars > Conference Talks > Contributed Talks
Royal Observatory of Belgium > Solar Physics & Space Weather (SIDC)
Solar-Terrestrial Centre of Excellence

 Record created 2019-01-23, last modified 2019-01-23