- PII
- 10.31857/S0016794023600230-1
- DOI
- 10.31857/S0016794023600230
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume 63 / Issue number 4
- Pages
- 488-495
- Abstract
- We use data from the Atmospheric Imaging Assembly (AIA) telescope on the Solar Dynamics Observatory (SDO) spacecraft in the 171 Å channel to investigate the spatial distribution of low-energy flares (nanoflashes). We have studied two periods: 05/20/2019 from 1200 UT to 1300 UT and 05/10/2020 from 1200 UT to 1300 UT. In total, we found 87974 nanoflares with an average formation rate of 6.0 × 10‒21 cm–2 s–1. For solar latitudes from 0° up to 50° the nanoflare formation rate is approximately uniform with a standard deviation of about 25%. We have found an asymmetry in the rate of formation of nanoflares in the southern and northern hemispheres of the Sun: the rate of formation of nanoflares in the southern hemisphere was 34–42% higher than in the northern one. During this period, the same asymmetry was also observed for ordinary f lares. We also found a weak dependence of the nanof lare formation rate on the solar cycle: the number of nanof lares increases with higher solar activity.
- Keywords
- Date of publication
- 01.04.2023
- Year of publication
- 2023
- Number of purchasers
- 0
- Views
- 50
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