Search Publications
Catalogue of 55-80 MeV solar proton events extending through solar cycles 23 and 24
Heber, Bernd; Paassilta, Miikka; Raukunen, Osku +9 more
We present a new catalogue of solar energetic particle events near the Earth, covering solar cycle 23 and the majority of solar cycle 24 (1996-2016), based on the 55-80 MeV proton intensity data gathered by the Solar and Heliospheric Observatory/the Energetic and Relativistic Nuclei and Electron experiment (SOHO/ERNE). In addition to ERNE proton a…
Multi-instrument observations of the solar eclipse on 20 March 2015 and its effects on the ionosphere over Belgium and Europe
De Keyser, Johan; Berghmans, David; West, Matthew J. +19 more
A total solar eclipse occurred on 20 March 2015, with a totality path passing mostly above the North Atlantic Ocean, which resulted in a partial solar eclipse over Belgium and large parts of Europe. In anticipation of this event, a dedicated observational campaign was set up at the Belgian Solar-Terrestrial Centre of Excellence (STCE). The objecti…
Solar signatures and eruption mechanism of the August 14, 2010 coronal mass ejection (CME)
Poedts, Stefaan; Berghmans, David; Seaton, Daniel B. +2 more
On August 14, 2010 a wide-angled coronal mass ejection (CME) was observed. This solar eruption originated from a destabilized filament that connected two active regions and the unwinding of this filament gave the eruption an untwisting motion that drew the attention of many observers. In addition to the erupting filament and the associated CME, se…
Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport
Iida, Yusuke
The solar dynamo problem is the question of how the cyclic variation in the solar magnetic field is maintained. One of the important processes is the transport of magnetic flux by surface convection. To reveal this process, the dependence of the squared displacement of magnetic flux concentrations on the elapsed time is investigated in this paper …
Validation of Earth atmosphere models using solar EUV observations from the CORONAS and PROBA2 satellites in occultation mode
Berghmans, David; Slemzin, Vladimir; Kuzin, Sergey +4 more
Aims: Knowledge of properties of the Earth's upper atmosphere is important for predicting the lifetime of low-orbit spacecraft as well as for planning operation of space instruments whose data may be distorted by atmospheric effects. The accuracy of the models commonly used for simulating the structure of the atmosphere is limited by the scarcity …
Investigating the kinematics of coronal mass ejections with the automated CORIMP catalog
Byrne, Jason P.
Studying coronal mass ejections (CMEs) in coronagraph data can be challenging due to their diffuse structure and transient nature, compounded by the variations in their dynamics, morphology and frequency of occurrence. The large amounts of data available from missions like the Solar and Heliospheric Observatory (SOHO) make manual cataloging of CME…
The PAC2MAN mission: a new tool to understand and predict solar energetic events
Musset, Sophie; Amaya, Jorge; Diercke, Andrea +12 more
An accurate forecast of flare and coronal mass ejection (CME) initiation requires precise measurements of the magnetic energy buildup and release in the active regions of the solar atmosphere. We designed a new space weather mission that performs such measurements using new optical instruments based on the Hanle and Zeeman effects. The mission con…
Photometric magnetic-activity metrics tested with the Sun: application to Kepler M dwarfs
García, Rafael A.; Mathur, Savita; Salabert, David +1 more
The Kepler mission has been providing high-quality photometric data leading to many breakthroughs in the exoplanet search and in stellar physics. Stellar magnetic activity results from the interaction between rotation, convection, and magnetic field. Constraining these processes is important if we want to better understand stellar magnetic activit…
The first SEPServer event catalogue ~68-MeV solar proton events observed at 1 AU in 1996-2010
Kouloumvakos, Athanasios; Heber, Bernd; Sanahuja, Blai +33 more
SEPServer is a three-year collaborative project funded by the seventh framework programme (FP7-SPACE) of the European Union. The objective of the project is to provide access to state-of-the-art observations and analysis tools for the scientific community on solar energetic particle (SEP) events and related electromagnetic (EM) emissions. The proj…
Solar activity and its evolution across the corona: recent advances
Vainio, Rami; Dudok de Wit, Thierry; Kretzschmar, Matthieu +15 more
Solar magnetism is responsible for the several active phenomena that occur in the solar atmosphere. The consequences of these phenomena on the solar-terrestrial environment and on Space Weather are nowadays clearly recognized, even if not yet fully understood. In order to shed light on the mechanisms that are at the basis of the Space Weather, it …