Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa21c0371s&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA21C-0371
Physics
6982 Tomography And Imaging, 2409 Current Systems (2708), 2435 Ionospheric Disturbances, 2443 Midlatitude Ionosphere, 2494 Instruments And Techniques
Scientific paper
Following the April 20, 2002 geomagnetic storm, the near Earth space environment experienced a fairly smooth recovery over April 21-22, 2002. The Dst index reached a minimum level of -148 nT at 0900 UTC on April 20, 2002. The Kp level of 7.33, reached between 0300 and 0700 UTC, indicated that the April 20, 2002 storm was a strong G3 geomagnetic storm. Following the peak at 0900 UTC, the Dst values returned to between -40 and -50 nT during April 21-22, 2002. Similarly, Kp returned to an undisturbed value of 2.67 around 2200-2400 UTC on April 20, and remained under 3 for most of April 21-22. Using the Ionospheric Data Assimilation Three Dimensional, an objective analysis algorithm, preliminary space weather maps of the electron density demonstrate the global ionospheric behavior during this storm recovery. These maps are generated from available electron content and electron density measurements.
Bust G.
Garner T.
Gaussrian T.
Sharman D.
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