50 citations
- Pulkovo ObservatoryRU6 papers
- Institute of Terrestrial Magnetism Ionosphere and Radio Wave PropagationRU3 papers
- National Solar ObservatoryUS2 papers
- ReSoLVE Center of ExcellenceFI2 papers
- Russian Academy of SciencesRU2 papers
- St Petersburg UniversityRU2 papers
- Ulugh Beg Astronomical InstituteUZ2 papers
- University of OuluFI2 papers
- Academy of Sciences Republic of UzbekistanUZ1 paper
- Indian Institute of Technology BHUIN1 paper
- Lomonosov Moscow State UniversityRU1 paper
- Maria Curie-Skłodowska UniversityPL1 paper
9 papers
Low-Latitude Sunspot Group Tilt Angles in 15-24 Activity Cycles
Andrey Tlatov
An analysis of the tilt angles of the active regions in 15-24 activity cycles was performed. We used data from measurements of magnetic fields in the sunspot umbra in the period 19…
Peculiar solar sources and geospace disturbances on 20-26 August 2018
A. A. Abunin, M. A. Abunina, A. V. Belov +1
On the approach to minimum of Solar Cycle 24, on 26 August 2018, an unexpectedly strong geomagnetic storm (GMS) suddenly occurred. Its Dst index reached -174 nT, that is the third…
Reconstructing solar magnetic fields from historical observations V. Sunspot magnetic field measurements at Mount Wilson Observatory
Alexei A. Pevtsov, Kseniya A. Tlatova, Alexander A. Pevtsov +7
Context. Systematic observations of magnetic field strength and polarity in sunspots began at Mount Wilson Observatory (MWO), USA in early 1917. Except for a few brief interruption…
Solar Eruptions, Forbush Decreases and Geomagnetic Disturbances from Outstanding Active Region 12673
I. M. Chertok, A. V. Belov, A. A. Abunin
Based on our tool for the early diagnostics of solar eruption geoeffectiveness (EDSEG tool; Chertok et al., 2013, 2015, 2017), we have analyzed space weather disturbances that occu…
Segmentation of coronal holes in solar disk images with a convolutional neural network
E. Illarionov, A. Tlatov
Current coronal holes segmentation methods typically rely on image thresholding and require non-trivial image pre- and post-processing. We have trained a neural network that accura…
Tilt of sunspot bipoles in Solar Cycles 15 to 24
Ksenia Tlatova, Andrey Tlatov, Alexei Pevtsov +7
We use recently digitized sunspot drawings from Mount Wilson Observatory to investigate the latitudinal dependence of tilt angles of active regions and its change with solar cycle.…