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zekecarr

Posts: 158 Member Since:07/04/09

#121 [url]

Jun 23 13 2:37 PM

Propagation de K7RA

22 June, 2013
ARLP025

Here we are at the Summer Solstice for the Northern Hemisphere, which was at 0504 UTC today, June 21. If you are west of the Central time zone, to you it was last evening. Today is the longest day of the year.....
http://www.southgatearc.org/propagation/2013/k7ra/025_june_22.htm#.Ucc_6PoYp9o

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w8eeo

Posts: 2,219 Member Since:10/04/08

#125 [url]

Jul 22 13 1:05 AM

Propagation de K7RA

20 July, 2013
ARLP029

Unsettled geomagnetic conditions continued this week, punctuated by periods of relative quiet. The most active days were July 14 and 15. The planetary A index was 20 and 25, and the mid-latitude A index was 15 and 33 on those dates. Of course Alaska's College A index was higher, at 58 and 34.....
http://www.southgatearc.org/propagation/2013/k7ra/029_july_20.htm#.Uey9C_oYp9o

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w8eeo

Posts: 2,219 Member Since:10/04/08

#128 [url]

Sep 29 13 3:50 AM

Propagation de K7RA 28 September, 2013
ARLP039Our sun is still very quiet, but solar flux and sunspot numbers were higher this week than last. Average daily sunspot numbers rose from 42.3 to 75.6, and average daily solar flux rose from 95.3 to 109.6..... http://www.southgatearc.org/propagation/2013/k7ra/039_september_28.htm#.UkfaddemfHQ

Last Edited By: w8eeo Sep 29 13 3:54 AM. Edited 1 time.

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w8eeo

Posts: 2,219 Member Since:10/04/08

#129 [url]

Sep 20 14 10:31 PM

Propagation de K7RA

20 September, 2014
ARLP038

On September 11 and 12 two powerful CMEs hit Earth, producing a G3 class geomagnetic storm. The result was a planetary A index of 44 on Friday, and during the final three hours of the UTC day (2:00 PM to 5:00 PM PDT) the planetary K index reached 7, which is very high...http://www.southgatearc.org/propagation/2014/k7ra/038_september_20.htm#.VB45VCWRCtZ

Last Edited By: w8eeo Sep 20 14 10:33 PM. Edited 1 time.

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Lady T

Posts: 25 Member Since:12/28/15

#130 [url]

Dec 28 15 2:16 AM

I probably should follow CME progression more. This may be a stupid question, but what are the odds of them causing damage when powerful CMEs hit Earth?

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