04/28/2017
Each of the average solar and geomagnetic indices rose last week (April 20-26) over the previous seven days.
Average daily sunspot number rose from 8.6 to 35.7, and solar flux rose from 76.5 to 81.4.
Average daily planetary A index went from 8 to 26.4, and average daily mid-latitude A index from 6.3 to 18.4.
The day with the most geomagnetic activity was April 22 when the planetary A index was 54. One the same date, Alaska’s College A index (near Fairbanks) was 86.
Predicted planetary A index is 8, 5 and 5 on April 28-30, then 14, 10, 8 and 10 on May 1-4, 15 on May 5-6, 8 on May 7-8, 5 on May 9-14, 8 and 15 on May 15-16, and then into a more active period at 30, 25, 45, 50 and 30 on May 17-21. Then 20 on May 22-24, then 15, 8, 5 and 20 on May 25-28, 10 on May 29-31, 15 on June 1-2, 8 on June 3-4, and 5 on June 5-9.
Predicted solar flux values are 79 on April 28-29, 78 on April 30 and May 1, 77 on May 2-4, 75 on May 5-14, 80 on May 15-18, 85 on May 19-24, 80 on May 25-28 and 75 on May 29 to June 10.
OK1HH sent us this geomagnetic activity forecast for the period April 28 til May 24, 2017.
Average daily sunspot number rose from 8.6 to 35.7, and solar flux rose from 76.5 to 81.4.
Average daily planetary A index went from 8 to 26.4, and average daily mid-latitude A index from 6.3 to 18.4.
The day with the most geomagnetic activity was April 22 when the planetary A index was 54. One the same date, Alaska’s College A index (near Fairbanks) was 86.
Predicted planetary A index is 8, 5 and 5 on April 28-30, then 14, 10, 8 and 10 on May 1-4, 15 on May 5-6, 8 on May 7-8, 5 on May 9-14, 8 and 15 on May 15-16, and then into a more active period at 30, 25, 45, 50 and 30 on May 17-21. Then 20 on May 22-24, then 15, 8, 5 and 20 on May 25-28, 10 on May 29-31, 15 on June 1-2, 8 on June 3-4, and 5 on June 5-9.
Predicted solar flux values are 79 on April 28-29, 78 on April 30 and May 1, 77 on May 2-4, 75 on May 5-14, 80 on May 15-18, 85 on May 19-24, 80 on May 25-28 and 75 on May 29 to June 10.
OK1HH sent us this geomagnetic activity forecast for the period April 28 til May 24, 2017.
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