Publications (6)
The AD775 cosmic event revisited: the Sun is to blame
I. G. Usoskin, B. Kromer, F. Ludlow +5
Miyake et al. (henceforth M12) recently reported, based on 14C data, an extreme cosmic event ca. AD775. Using a simple model, M12 claimed that the event was too strong to be caused…
Phase coherence and phase jumps in the Schwabe cycle
F. Stefani, J. Beer, A. Giesecke +4
Guided by the working hypothesis that the Schwabe cycle of solar activity is synchronized by the 11.07 years alignment cycle of the tidally dominant planets Venus, Earth and Jupite…
36Cl Concentrations from Polar Ice Cores Set New Constraints on the Carrington Event
F. Mekhaldi, C. I. Paleari, A. M. Smith +12
The Carrington event of 1859 CE is considered as one of the largest geomagnetic storms of the observational era, and often used as a benchmark for a worst-case scenario. Yet, there…
No evidence for absence of solar dynamo synchronization
F. Stefani, J. Beer, T. Weier
Context: The old question of whether the solar dynamo is synchronized by the tidal forces of the orbiting planets has recently received renewed interest, both from the viewpoint of…
Revised historical solar irradiance forcing
T. Egorova, W. Schmutz, E. Rozanov +5
Context. There is no consensus on the amplitude of the historical solar forcing. The estimated magnitude of the total solar irradiance difference between Maunder minimum and presen…
Estimating the frequency of extremely energetic solar events, based on solar, stellar, lunar, and terrestrial records
C. J. Schrijver, J. Beer, U. Baltensperger +9
The most powerful explosions on the Sun [...] drive the most severe space-weather storms. Proxy records of flare energies based on SEPs in principle may offer the longest time base…