sun spots or not
sun spots or not
by 2E0ZMO Tue Apr 07, 2009 8:31 am
Our Sun is in the news again, unfortunately not due to any hoped-for activity, but for the eerie quiet instead. The Sun is surprisingly calm by several measurements, including the large number of spotless days, with an average 10.7 cm solar flux and low solar wind pressure.
Right now there are no sunspots, but the 10.7 cm solar flux is up a bit lately. The latest prediction has the usual quiet planetary A index at 8 for April 3-4, then back to 5, then 15 and 10 for April 9-10. Predicted solar flux is 71 for April 3-9, then back to 70 for April 10-22 then to 72 for April 23 and into May.
Sunspot numbers for March 26-April 1 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0. The 10.7 cm flux was 69.1, 71.6, 70.6, 70.9, 70.9, 71.2 and 70.8 with a mean of 70.7. The estimated planetary A indices were 7, 4, 4, 5, 4, 4 and 4 with a mean of 4.6. The estimated mid-latitude A indices were 6, 2, 2, 4, 3, 2 and 3 with a mean of 3.1.
For more information concerning radio propagation, visit the ARRL Technical Information Service Propagation page. To read this week's Solar Report in its entirety, check out the W1AW Propagation Bulletin page. This week's "Tad Cookism" brought to you by Thomas Carew's "The Spring".
Right now there are no sunspots, but the 10.7 cm solar flux is up a bit lately. The latest prediction has the usual quiet planetary A index at 8 for April 3-4, then back to 5, then 15 and 10 for April 9-10. Predicted solar flux is 71 for April 3-9, then back to 70 for April 10-22 then to 72 for April 23 and into May.
Sunspot numbers for March 26-April 1 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0. The 10.7 cm flux was 69.1, 71.6, 70.6, 70.9, 70.9, 71.2 and 70.8 with a mean of 70.7. The estimated planetary A indices were 7, 4, 4, 5, 4, 4 and 4 with a mean of 4.6. The estimated mid-latitude A indices were 6, 2, 2, 4, 3, 2 and 3 with a mean of 3.1.
For more information concerning radio propagation, visit the ARRL Technical Information Service Propagation page. To read this week's Solar Report in its entirety, check out the W1AW Propagation Bulletin page. This week's "Tad Cookism" brought to you by Thomas Carew's "The Spring".
2E0ZMO- Moderator
- Call Sign : 2e0zmo
Other Call Signs : m3zmo
Locator : io83nn
DXCC Entity : england
HF Rig : icom ic706mk1
HF Antenna : g5rv
VHF / UHF Rig : icom ic2800,yaesu ft7800
VHF / UHF Antenna : tri band colinear,duel band on the van
HandHeld : puxing px777
Preferred Bands : 2m,70cm ,20m
Location : NORTHWEST ENGLAND
Registration date : 2007-10-10
Number of posts : 547
Points : 332
Reputation : 16 -
Permissions in this forum:
You cannot reply to topics in this forum|
|
|