3-11 July 2007
Merida, Mexico
Mexico/General timezone
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SH 2.1

Place

Location: Merida, Mexico
Room: Yucatan I (Fiesta Americana)
Date: 5 Jul 12:05 - 13:30

Conveners

    • Dr. Ryan, James (University of New Hampshire)

Timetable | Contribution List

Displaying 7 contributions out of 7
Type: Oral Session: SH 2.1
Track: SH.2.1
Interplanetary coronal mass ejections, the interplanetary counterparts of coronal mass ejections at the Sun, are the major drivers of interplanetary shocks in the heliosphere, and are associated with modulations of the galactic cosmic ray intensity, both short term (Forbush decreases caused by the passage of the shock, post-shock sheath, and ICME) and possibly with longer term modulation. Usi ... More
Presented by Dr. Hilary CANE on 5/7/2007 at 17:41
Type: Oral Session: SH 2.1
Track: SH.2.1
Solar wind streams from coronal holes and those associated with coronal mass ejections (CMEs) have been identified. Using superposed epoch analysis, we analyze the cosmic ray neutron monitor data and solar wind plasma/field data with respect to two types of streams. We found a large difference in the cosmic- ray response to the streams of different origin. The observed difference in the a ... More
Presented by Dr. Badruddin --
Type: Oral Session: SH 2.1
Track: SH.2.1
We presented a statistical study of major Forbush decreases during the last decades, using cosmic ray data from ground based detectors -- neutron monitors and a muon detector. We show that, in addition to typical event (e.g., September 2005), there are several unusual Forbush decreases (e.g., November 2004), which depict unexpected features: (1) the recovery time of a Forbush decrease stron ... More
Presented by Dr. Ilya USOSKIN on 5/7/2007 at 18:17
Type: Oral Session: SH 2.1
Track: SH.2.1
The Goddard Medium Energy experiment on the IMP 8 spacecraft has made nearly continuous observations of the near-Earth energetic particle environment from its launch in October, 1973 until near present. We summarize several aspects of these observations, including solar energetic particle events, CIR-associated events, and cosmic ray modulations. In particular, we note that, as expected from ... More
Presented by Tycho VON ROSENVINGE on 5/7/2007 at 17:53
Type: Oral Session: SH 2.1
Track: SH.2.1
Muon rate variations during Forbush decreases registered by means of muon detectors DECOR, TEMP and URAGAN operated in the experimental complex NEVOD (MEPhI, Moscow) have been studied. Analysis of data of these setups and also of Moscow neutron monitor (IZMIRAN) has been performed using a special technique that reduces as statistical as systematic uncertainties. Preliminary muon energy a ... More
Presented by Dr. Dmitry TIMASHKOV on 5/7/2007 at 17:29
Type: Oral Session: SH 2.1
Track: SH.2.1
The IGY type neutron monitor operating at Gulmarg has been modified to a lead-free detector to detect neutron bursts produced in lightning discharge channels. The monitor also records continuously neutrons produced by the cosmic ray interactions with the atmospheric constituents. Apart from recording integrated low energy neutron count, the monitor is also set to record neutron bunches with mu ... More
Presented by Dr. G. N. SHAH
Type: Oral Session: SH 2.1
Track: SH.2.1
A strong Forbush Decrease (FD) was observed by ground based neutron monitor at Oulu in the mid of May 2005. The onset of FD took place on May 13 and attained its maximum on May 15, 2005. The event was in response to 221 X-ray flares out of which 13 were of M class and they were followed by coronal mass ejection (CME). This has caused a rapid decrease in galactic cosmic ray intensity call ... More
Presented by Mrs. Manjula JAIN on 5/7/2007 at 17:05
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