Solar Cycle 25 Producing Record High Sunspot Numbers
/Record High Solar Cycle 25 Solar Maximum Sunspot Numbers Have Improved HF Propagation Since Mid-July and Possibly Bringing Worldwide 6 Meter F2 Propagation This Fall.
According to the NOAA Space Weather Prediction Centre (SWPC), Solar Cycle 25 likely reached its highest sunspot number yet of at least 299 on 8th August 2024.
The World Data Centre - Sunspot Index and Long-Term Solar Observations (SILSO) publishes near-real-time Estimated International Sunspot Number (EISN) reports based on its global network of reporting stations. Daily EISN reports during Solar Cycle 25 were consistently well below 200 until suddenly rising to 218 on 14th July and reaching 289 on July 18th, but then declining to 178 on 22nd July 2024.
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