448 citations · 2.8k across the 32 of their papers we have counts for
32 papers
High-altitude polar NM with the new DAQ system as a tool to study details of the cosmic-ray induced nucleonic cascade
Markus Similä, Ilya Usoskin, Stepan Poluianov +3
A neutron monitor (NM) is, since the 1950s, a standard ground-based detector whose count rate reflects cosmic-ray variability. The worldwide network of NMs forms a rough spectromet…
Solar cyclic activity over the last millennium reconstructed from annual 14C data
I. G. Usoskin, S. K. Solanki, N. Krivova +5
The 11-year solar cycle is the dominant pattern of solar activity reflecting the oscillatory dynamo mechanism in the Sun. Solar cycles were directly observed since 1700, while indi…
New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events
Sergey A. Koldobskiy, Osku Raukunen, Rami Vainio +2
Fluences of solar energetic particles (SEPs) are not easy to evaluate, especially for high-energy events (i.e. ground-level enhancements, GLEs). Earlier estimates of event-integrat…
Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated ADF Sunspot Group Series
Ilya Usoskin, Gennady Kovaltsov, Wilma Kiviaho
Empirical rules of solar cycle evolution form important observational constraints for the solar dynamo theory. This includes the Waldmeier rule relating the magnitude of a solar cy…
A New Full 3-D Model of Cosmogenic Tritium H Production in the Atmosphere (CRAC:3H)
S. V. Poluianov, G. A. Kovaltsov, I. G. Usoskin
A new model of cosmogenic tritium (H) production in the atmosphere is presented. The model belongs to the CRAC (Cosmic-Ray Atmospheric Cascade) family and is named as CRAC:3H.…
Revisited reference solar proton event of 23-Feb-1956: Assessment of the cosmogenic-isotope method sensitivity to extreme solar events
Ilya G. Usoskin, Sergey A. Koldobskiy, Gennady A. Kovaltsov +4
Our direct knowledge of solar eruptive events is limited to several decades and does not include extreme events, which can only be studied by the indirect proxy method over millenn…