Evan is publishing his findings on the structuring of plasma in the high-latitude ionosphere during geomagnetic storms. He has obtained striking new views of the generation of Tongues of Ionization (ToI) and patches from Storm-Enhanced Density (SED) plumes by combining information on ionospheric plasma density from GPS satellite measurements with maps of plasma motion obtained with the SuperDARN HF radars.
Evan has made available much of his analysis software in the form of web-accessible research tools. Link to the 'GPS/TEC Plot' tool or click directly on
http://vt.superdarn.org/tiki-index.php?page=DaViT+TEC+Four+Plot

to view plots of Total Electron Content (TEC) and radar backscatter.
Records are complete for 2006-2011; check on availability in 2012 by consulting the TEC data inventory at
http://davit.ece.vt.edu/images/tec_inv.jpg
