First SOLSTEL papers published

Written by Bojan Vršnak on .

The very first results of the SOLSTEL project related research were published in November 2014 in Solar Physics.

illustration of the Sun-Earth connectionA paper by Dumbović et al. „Geoeffectiveness of Coronal Mass Ejections in the SOHO Era" presents the results of the statistical analysis of the relation between remotely observed properties of CMEs and associated solar flares, indicating the importance of the initial CME speed, apparent width, source position, and the class of the associated solar flare. The results of the statistical study are employed to construct an empirical statistical model which can be used for future space-weather forecasting.

EUV-MHD-wavesIn the paper by Muhr et al. „Statistical Analysis of Large-Scale EUV Waves Observed by STEREO/EUVI" the evolution and wave pulse characteristics of 60 strong large-scale global EUV wave events that occurred during January 2007 to February 2011 with the STEREO twin spacecraft was analyzed. Correlations between the peak velocity and the peak amplitude, impulsiveness, and build-up time of the disturbance were found, providing strong evidence that the EUV waves are large-amplitude fast-mode MHD waves. The explanation of the obtained empirical reults is the main objective of the ongoing analysis of the MHD numerical simulations performed in the scope of SOLSTEL.


2014 Living with a Star (LWS) Science Meeting in Portland

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LWS-2014-meetingThe 2014 Living with a Star (LWS) Science Meeting „Evolving Solar Activity and Its Influence on Space and Earth" was held Nov. 2-6, 2014 in Portland, Oregon, USA. The focus of the meeting was on advancing the understanding of the integral system coupling the Sun to the Earth. M. Dumbović attended the meeting and presented a poster titled "The CME Geomagnetic Forecast Tool (CGFT)". More information on the meeting can be found at:


Hvar Observatory guests

Written by Bojan Vršnak on .

rom left to right: Davor Sudar, Peter Foukal, Mateja Dumbović & Jaša Čalogović. Photo by Elisabeth Foukal.Prof. Peter Foukal, member of U.S. National Academy of Sciences Panel on Sun-Climate Influences and the author of the book Solar Astrophysics, visited the Hvar Observatory on September 20th, 2014. After showing the observatory, M. Dumbović, J. Čalogović, and D. Sudar exposed to the distinguished guest the SOLSTEL project.

Next day, Dr. Martin Leitzinger, Dr. Robert Greimel from Institute of Physics, University of Graz, arrived to the observatory to stay for three days. During their stay the collaboration on the 1-m telescope observations of the solar-like stars was agreed.