Propagation, Space Weather, and Sunspot Cycle Resource Center
By NW7US - Tomas David HoodFollow Space Weather on Twitter: @hfradiospacewx
This page was rendered on 20-May-25 2001 UTC.
Current Sunspot Cycle Activity and Space Weather:
Sun Spots: 66 as of 05/19/2025 :: Flux: 117
X-ray Solar Flares:
6h hi [M3.2][0813Z 05/19] 24h hi [M3.2][0813Z 05/19]
Current Space Weather Activity:
Planetary A-index (Ap): 10 | Planetary K-index (Kp): 2.67
Solar Wind: 527 km/s at 2.0 protons/cm3, Bz is 2.0 nT
(May 20, 2025 at 1951 UT)
STEREO IMAGES
Real Time Space Weather:
On 2025 May 20 1956Z: Bz: 2.7 nT
Bx: -5.0 nT | By: 6.6 nT | Total: 8.7 nT
Most recent satellite polar pass:
Centered on // : UTC
Aurora Activity Level was at UTC
visit noaa for latest.
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
Global Propagation Conditions
Global HF Propagation Conditions for 0400Z on 05 May, 2021
High Latitude: Normal
Middle Latitude: Normal
Low Latitude: Normal
[ Aurora Map ][ Other Kp graphs ]
Warnings/Alerts issued in the last 24 hours, if any:
(scales: http://www.sec.noaa.gov/NOAAscales/)
Real-time foF2 map from IPS (), Australia
Current Sunspot Cycle Activity and Space Weather:
Sun Spots: 66 as of 05/19/2025 :: Flux: 117
X-ray Solar Flares:
6h hi [M3.2][0813Z 05/19] 24h hi [M3.2][0813Z 05/19]
Current Space Weather Activity:
Planetary A-index (Ap): 10 | Planetary K-index (Kp): 2.67
Solar Wind: 527 km/s at 2.0 protons/cm3, Bz is 2.0 nT
(May 20, 2025 at 1951 UT)
STEREO IMAGES
 What is coming |
 Current View |
 What was... |
Real Time Space Weather:
On 2025 May 20 1956Z: Bz: 2.7 nT
Bx: -5.0 nT | By: 6.6 nT | Total: 8.7 nT
Most recent satellite polar pass:
Centered on // : UTC
Aurora Activity Level was at UTC
visit noaa for latest.
|
Auroral Map:
|
|
GEOS Solar X-ray Flux:
|
Satellite Environment Plot:
|
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
Global Propagation Conditions
Global HF Propagation Conditions for 0400Z on 05 May, 2021
High Latitude: Normal
Middle Latitude: Normal
Low Latitude: Normal
[ Aurora Map ][ Other Kp graphs ]
Warnings/Alerts issued in the last 24 hours, if any:
(scales: http://www.sec.noaa.gov/NOAAscales/)
Real-time foF2 map from IPS (), Australia
[ live aurora display ][ auroral polar maps ]
[ 1m x-ray flare graph ][ 5m x-ray flare graph ]
[ d-layer conditions ]
[ latest solar images 1 ][ latest solar images 2 ]
[ latest solar images 3 ]
[ active solar regions ][ current solar region image ]
[ What is a flare and its class? ]
Recent Space Environment Reports:
+ Reports of Solar & Geophysical Activity
+ Solar & Geophysical Activity Summaries
From the Space Environment Center:
Solar X-ray Flux
+ A 3 day plot of 5-minute solar X-ray flux values measured on the GOES 8 and 10 satellites.
+ A 6-hour 1-min Solar X-ray Flux plot
Satellite Environment Plot
+ Proton Flux
+ Electron Flux
+ GEOS Hp
+ Estimated Kp
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The current footprint of my 60-watt PSK31 signal during 50 percent of October 2009 at 2000 UTC and 2300 on 20 Meters:
(created with ACE-HF Pro version 2.05 Propagation Modeling Software) (these illustrate why I like running digital modes during the Solar Cycle minimum - PSK31, and other digital modes, get much farther than an SSB signal, using the same amount of power)
(created with ACE-HF Pro version 2.05 Propagation Modeling Software) (these illustrate why I like running digital modes during the Solar Cycle minimum - PSK31, and other digital modes, get much farther than an SSB signal, using the same amount of power)