NLN Aurora Briefs – February 28, 2015

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SWPC (NOAA’s Space Weather Prediction Center) has extended the G1 Geomagnetic storm watch to 72 hours. It now runs from 7:00pm Friday night EST through 7:00pm EST Monday night. This means there is a chance for KP=5 on each of the next three days. Here’s the watches/warnings graphic from SWPC:

72 hour storm watch posted by SWPC
72 hour storm watch posted by SWPC

KP isn’t expected to pick up until late in the first day of the watch period. The best opportunities for aurora will be right at the beginning of the uptick in solar wind speed as the solar sector boundary passes earth, then again later after the high wind speedand density has been impacting the geomagnetosphere for an extended period of time.

In today’s featured tweet, we toot our own horn a little. This shows the current coronal hole on the last rotation (when it produced 4 days of enhanced geomagnetic activity) and on this rotation. Doesn’t look much different, does it?