Propagation & Space Weather Info Collected from Different Sources
:Product: Report of Solar-Geophysical Activity :Issued: 2021 Jan 17 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 17 Issued at 2200Z on 17 Jan 2021 IA. Analysis of Solar Active Regions and Activity from 16/2100Z to 17/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 2 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low with a slight chance for a C-class flare on days one, two, and three (18 Jan, 19 Jan, 20 Jan). IIA. Geophysical Activity Summary 16/2100Z to 17/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 316 km/s at 16/2105Z. Total IMF reached 5 nT at 17/0114Z. The maximum southward component of Bz reached -4 nT at 17/2041Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 189 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one, two, and three (18 Jan, 19 Jan, 20 Jan). III. Event probabilities 18 Jan-20 Jan Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 17 Jan 077 Predicted 18 Jan-20 Jan 077/077/077 90 Day Mean 17 Jan 085 V. Geomagnetic A Indices Observed Afr/Ap 16 Jan 002/002 Estimated Afr/Ap 17 Jan 003/003 Predicted Afr/Ap 18 Jan-20 Jan 011/012-013/015-011/012 VI. Geomagnetic Activity Probabilities 18 Jan-20 Jan A. Middle Latitudes Active 35/40/35 Minor Storm 10/15/10 Major-severe storm 01/01/01 B. High Latitudes Active 10/10/15 Minor Storm 25/30/30 Major-severe storm 40/55/45
Solar Images
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GOES-15 X-ray Image
NOAA/SWPC Boulder, CO -
SOHO EIT Fe XII 195 Å Image
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SDO AIA 4500 Å Image
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SOHO LASCO White Light Image (C2) of the Sun's Corona
LASCO Homepages
More solar/images: http://sprg.ssl.berkeley.edu/shine/suntoday.html
Aurora
Geomagnetic activity nowcast (Finland)
Current magnetic activity level in northern and southern Finland + near real-time/images from aurora cameras:
http://aurora.fmi.fi/public_service/index.html
The Kjell Henriksen Observatory website at http://kho.unis.no/ contains aurora forecast up to one hour ahead in time.
DX Robot Gouda delivers aurora alerts via e-mail: http://www.gooddx.net/
Aurora alerts via e-mail for Finnish operators: revontulialertti
Solar Wind & Other Data
Map of the Latest 11m Spots from the CRX Cluster Network
Solar and auroral data: http://www.solarham.net
Propagation Tutorials
General Guidelines for Correlation of Propagation Indices to Actual HF Propagation Conditions
N0NBH's propagation tutorial (PDF)
NM7M: The Little Pistol's Guide to HF Propagation (PDF)
Propagation Broadcasts and Forecasts Demystified (PDF)
RSGB Propagation Studies Committee (Lots of info on different propagation modes.)
Understanding 10 (11) Meter Sporadic-E (Understanding ES or “short skip”)