Interplanetary coronal mass ejection effect on the muon flux at sea level

Details Interplanetary coronal mass ejection effect on the muon flux at sea level Interplanetary coronal mass ejection effect on the muon flux at sea level

2005-06-13

arxiv.org/abs/astro-ph/0506292v1

Astronomy and Astrophysics

Astrophysics

9 pages, 6 figures

Scientific paper

We present the results of 720 hours of observations of transient solar events at ground level, during the summer season 2005 (Souther Hemisphere). Data were taken with the TUPI muon telescope, working at a high counting rate (up to 100 KHz) and always pointing on the IMF lines (45 degrees of pitch angle). An anti-correlation among the arrival of keV protons (observed by EPAM detector aboard the ACE spacecraft) and sudden depressions in the muon flux at sea level have been observed. The phenomena is discussed in the context that they can be considered as mini-Forbush, caused by a shielding effect of the passage of a disturbance (shock and plasma) and may be a signature of interplanetary manifestations of coronal mass ejections.

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