The two-step Forbush decrease: An empirical model
نویسندگان
چکیده
منابع مشابه
Forbush Decrease Data with a Simple Model
On October 28, 2003 an earthward-directed coronal mass ejection (CME) was observed from SOHO/LASCO imagery in conjunction with an X17 solar flare. The CME, traveling at nearly 2000 km/s, impacted the Earth on October 29, 2003 causing ground-based particle detectors to register a counting rate drop known as a Forbush decrease. In addition to affecting the rate of cosmic rays, the CME was also re...
متن کاملThe Decay of Interplanetary Coronal Mass Ejections and Forbush Decrease Recovery Times
We investigate the relation between Forbush cosmic ray decrease recovery time, and coronal mass ejection angular size and transit time between the Sun and Earth. We identify 10 Forbush decreases from ground based neutron count rates between 1997 and 2000, with the addition of the Halloween 2003 event, that can be associated with single coronal mass ejections (CMEs) in the SOHO LASCO CME Catalog...
متن کاملBalloon Observations of Galactic Cosmic Ray Helium before and during a Forbush Decrease
The energy spectrum of galactic cosmic ray Helium was measured in two different balloon experiments launched four days apart from Canada: SMILI-I on 1-Sept-1989 and MASS on 5-Sept-1989. A slow Forbush decrease began on 4-Sept-1989 and had not reached its maximum at the time of the MASS flight. Comparison of the balloon measurements shows a fractional crease of 0.37 to 0.15 in the Helium flux be...
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[1] We investigate the relation between Forbush cosmic ray decrease recovery time and coronal mass ejection transit time between the Sun and Earth. We identify 17 Forbush decreases from ground-based neutron count rates between 1978 and 2003 that occur during the same phase in the solar cycle and can be associated with single coronal mass ejections (CMEs) in the SOHO LASCO CME Catalog or previou...
متن کاملTwo-step generalised empirical likelihood inference for semiparametric models
This paper shows how generalised empirical likelihood can be used to obtain valid asymptotic inference for the nite dimensional component of semiparametric models de ned by a set of moment conditions. The results of the paper are illustrated using two well-known semiparametric regression models: the partially linear single index model and the linear transformation model with random censoring.
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2004
ISSN: 0148-0227
DOI: 10.1029/2002ja009814