Auroral Activity on January 12, 1997

CME Event

During the days after the major aurora resulting from the CME event on January 6 the aurora remained at a fairly high activity level. On January 12 there was an isolated substorm between 08:00 and 09:00 UT. We study the ionospheric response to this particular sudden energy input because of the isolation of the event.

Raw Data (January 12, 1997)

These images are raw UVI images, not calibrated and not transformed into geographic coordinate systems. One image every 5 minutes (approximately) is shown to give a general overview of the auroral activity.

Summary plots from 12 January with one sample image about every 5 minutes (LBH-long filter)

00:03-03:20 UT	03:23-06:39 UT	06:42-09:59 UT
14:36-17:57 UT	18:00-21:17 UT	21:20-23:58 UT

The energy flux is the period around the peak at 8:00-8:30 shows an intensifying structure moving through midnight towards the evening side of the auroral oval. After the energy flux peaks at 8:12, the entire nightside oval becomes wider leading to the second peak in the hemispheric power at 8:30.