Investigation of muon flux anisotropy during CME

TL;DR

This study investigates how coronal mass ejections influence muon flux anisotropy at ground level, utilizing the URAGAN muon hodoscope to analyze spatial and angular variations during different solar activity periods from 2008 to 2015.

Contribution

It introduces the use of the URAGAN muon hodoscope for detailed analysis of muon flux anisotropy related to CMEs, including those directed away from Earth, over multiple solar cycles.

Findings

Detected muon flux anisotropy changes during CMEs

Observed effects for CMEs on the Sun's opposite side

Analyzed data across different solar activity stages

Abstract

According to CACTus catalog, during periods of a high solar activity every day up to tens of coronal mass ejections are observed. Such ejections have an impact on the flux of cosmic rays that permeate the space around us. Unlike most ground cosmic ray detectors, muon hodoscope URAGAN (MEPhI) allows to investigate not only the integrated counting rate of registered particles, but also the spatial and angular characteristics of the muon flux at ground level. This approach to particle detection allows fixing changes in the flux of cosmic rays not only for geoeffective CMEs, but also for the ejections, the front of which is directed to the opposite side of the Sun. The results of the study of different types of CMEs at different stages of the solar activity from 2008 to 2015 are presented.