[Mldxcc] Fwd: SUMMARY: Geomagnetic Sudden Impulse

[Rick WA6NHC]

I haven't seen this one before, just came in the email...
Rick wa6nhc/7

Space Weather Message Code: SUMSUD
Serial Number: 221
Issue Time: 2017 Jul 01 1735 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2017 Jul 01 1712 UTC
Deviation: 20 nT
Station: CMO

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

---- Explanation -----


    Geomagnetic Sudden Impulse Warning and Summary

All SWPC Space Weather Alert Messages for geomagnetic phenomena are 
based primarily on NOAA's real-time estimate of the planetary Kp index. 
Planetary K-index values of 5 through 9 correspond to the NOAA 
Geomagnetic Storm (G-Scale) for categories G1 through G5.

WARNING: Geomagnetic Sudden Impulse expected
SUMMARY: Geomagnetic Sudden Impulse

A Geomagnetic Sudden Impulse *WARNING* is issued based primarily on 
solar wind data available from the ACE satellite. These warnings are 
generally for short lead-time (10-60 minutes), high confidence 
indication of an expected Geomagnetic Sudden Impulse, and possible onset 
of subsequent geomagnetic storming. A Geomagnetic Sudden Impulse 
*SUMMARY* is issued upon its observation, and will generally be based on 
data from the primary Boulder USGS magnetometer, but may be based on a 
specified alternate magnetometer station if Boulder data is not available.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.contesting.com/pipermail/mldxcc/attachments/20170701/3887522a/attachment.html>