Mini-Forbush events on the muon flux at sea level
- Instituto de Fisica, Universidade Federal Fluminense, Av. General Milton Tavares de Souza s/n, Gragoata 24210-340, Niteroi, RJ (Brazil)
The results of 720 hours of observation of transient solar events at ground level during the summer season of 2005 in the southern hemisphere are presented. Data were taken with the TUPI muon telescope working at a high counting rate of up to 100 KHz and always pointing to the IMF lines at 45 degrees of pitch angle. An anticorrelation between the arrival of the KeV protons observed by EPAM detector aboard the ACE spacecraft and sudden depressions in the muon flux at sea level has been observed. The phenomenon is discussed in the context that it can be considered as mini-Forbush, caused by a shielding effect of the passage of a disturbance (shock and plasma). It may be regarded as a signature of interplanetary manifestations of coronal mass ejections, as well as corotating high speed streams.
- OSTI ID:
- 20711519
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 10; Other Information: DOI: 10.1103/PhysRevD.72.103001; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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