This page last updated 2013/05/21 10:14:12 Cape Town Time = South African Standard Time - SAST = UT+2
CURRENT CONDITIONS: Solar activity is low to moderate with background X-ray flux at upper B-class levels. Geomagnetic conditions are at quiet levels. Local HF working frequencies are near monthly average predicted values.
EVENTS: A M-class flare from active region 1753 and two C-class flares from active regions 1748.
OUTLOOK: A new active region on the north-east limb of the Sun has a complex magnetic configuration which may produce M or X-class flares. Signal absorption is expected due to the high background X-ray flux. Geomagnetic conditions are expected to be unsettled for the next 24 hours.
SYSTEMS AFFECTED: HF Propagation.
Follow us on Twitter by clicking Here
THREE-DAY PREDICTIONS FOR THE SOUTHERN AFRICAN REGION
Current Sunspot Count: 113 (physical sunspots/area count - no relation to EM emission) - See WCI below for effective SSN for HF frequency prediction purposes.
Green border - OK, Yellow border - beware, Red border - problems for HF comms.
The Font colours for T-Index and FoF2 values have the following meanings:
Black - information less than 3 hours old at time of web page update - can be used for current activities.
Dark Grey - information between 3 and 6 hours old at time of web page update
Light Grey - Information more than 6 hours old and cannot be used for current activities - for info only
The WCI (Wind Compensated Index), or Se Solar index works well with IONCAP/ICEPAC/VOACAP for near real-time Ionospheric evaluations
**T-indices do not stay fixed on one value for days on end. We therefore provide the ranges of values the T-indices are expected to reach during the course of the days indicated, with an average value that can be used for daily frequency predictions.
***Relative to the published monthly average predicted T-indices
If you are new to space weather, please click here for an introduction to the subject.
New long term T-Indices (1938-2015) have been released (Prepared at 02:43 UT on 01 Apr 2013 - Sydney) please get the latest values via a link in the bulletins section, or go straight to the LATEST MONTHLY T-INDICES PAGE to get updates for your ASAPS/WASAPS data bases. A text-only version which can be used to automatically update ASAPS and WASAPS data bases can be downloaded from here.
We have a page containing links to some raw information that could be useful to more advanced users.
Latest Available Ionograms from Hermanus, Grahamstown, Louisvale and Madimbo.
103 Day Predictions - for daily values see the Bulletins page
The next graph summarizes solar conditions for the past 30 days
The following two graphs summarize geomagnetic conditions for the past 30 days
For Those Interested in the Latest Weather (Earthbound)
We have a page providing (almost) real-time local (Simon's Town) weather here.
This should be the latest satellite image available
copyright 2011 WEATHER.COM
Remember to refresh the page to get the latest picture!