Substorm and High Speed Stream Observations During Solar Cyles 22 and 23

Details Substorm and High Speed Stream Observations During Solar Cyles 22 and 23 Substorm and High Speed Stream Observations During Solar Cyles 22 and 23

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm41a..03t&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SM41A-03

Physics

2102 Corotating Streams, 2162 Solar Cycle Variations (7536), 2788 Storms And Substorms

Scientific paper

Magnetic measurements from the MIRACLE network are used to identify substorms during solar cycles 22 and 23, from 1993 to 2004. For the first time substorm activity is examined over a complete solar cycle. In this study more than 5000 substorms are identified and their interplanetary drivers are examined. A new parameter called substorm number Rsu is formed based on (monthly) averages of substorm peak amplitudes. The substorm number measures magnetic activity of the Earth's magnetosphere in a way analogous to how sunspot number Rz estimates the level of Sun's magnetic activity. Analysis of WIND, ACE and SOHO interplanetary measurements indicate that high speed streams (HSS, with Sun-to-Earth velocities over 700 km/s) are the main drivers of the terrestrial substorms. The substorm number peaked in 1994-1995 and in 2003-2004 (at 3-4 years after the sunspot maximum), which is when the high speed streams occurred repeatedly every 27 days. During the years of repeated HSSs, substorms occurred more frequently, were more intense, and carried more magnetic energy to the auroral ionosphere, compared to the substorms existing during non-HSS intervals.

Affiliated with

Also associated with

No associations

Rating

Substorm and High Speed Stream Observations During Solar Cyles 22 and 23 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Substorm and High Speed Stream Observations During Solar Cyles 22 and 23, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substorm and High Speed Stream Observations During Solar Cyles 22 and 23 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1696199