2. CDS Images at Different Spectral Lines - Temperatures

3. Recent Scientific Advance: Detection of Supersonic Shock from Solar Flare
Discovery of coronal shock wave running across the solar disk. Shock wave was
generated by April 7, 1997 solar flare; also caused a large halo mass ejection.
Left image is Fe XII at 195 A, formed at a temperature of about 1.5 million degrees.
Shock is shown in black and white difference images where each image shows the
difference from the previous image. The speed at which the blast wave moved
across the solar disk was estimated at 400 km/sec - supersonic speed.
Supersonic shock from solar flare

4. Comet (vs time)

5. ACE
WIND
POLAR

6. Sun-Earth Connection: Images of Solar Event and Terrestrial Response
Solar flare, blast wave, and Coronal ‘Halo” Mass Ejection observed on April 7, 1997 by SOHO
Radio emission from shockfront tracked from Sun to Earth by WIND
• Aurorae observed in visible, UV, and X-rays by POLAR and from ground(e.g. Boston) April 11.
Tempo 2 comsat loses 15% of power on April 11, attributed to solar event
Event is lead story on Dan Rather’s Evening News
Comet Hale-Bopp
Photo: F. Sienkewicz

7. The Geomagnetic Storm of 11 April 1997:
Global, Synoptic, Regional, and Local Effects
NASA/POLAR
CEPPAD/IPS
ENA Imager
Synoptic Auroral Intensification Viewed above Earth’s North Pole
Global Van Allen Belt Enhancement
as Viewed from Space
NASA/POLAR
PIXIE X-Ray Imager
Boston University
All-Sky Auroral
Imaging System
Regional Auroral Emissions Measured from Ground Imagers
Photo courtesy of F. Sienkiewicz,
Boston University
Visible Aurora Seen Locally, North from Gloucester, MA
HESpence, Boston University Center for Space Physics, 10/16/97

8. Solar Mass Ejection Imager (SMEI) First Light Image
Launched January 6, 2003