An active region belonging to Cycle 25 will begin to turn into view off the northeast limb during the next 24 hours. So far the solar X-Ray background levels have remained below B-Class territory, so the region does not appear to be actively flaring for the time being .More updates to follow whenever necessary. Image […] Read more
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Tad Cook, K7RA, Seattle, reports: Another Cycle 25 sunspot (AR2767) appeared this week, with a minimum non-zero sunspot number of 11 on July 21 – 23. This puts the average daily sunspot number for the July 16 – 22 reporting week at 3.1, up from 1.7 over the previous 7 days. Geomagnetic indicators remain very quiet, […] Read more
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Solar activity remains at very low levels on Thursday. The lone spotted region (AR 2767) continues to transit the southeast quadrant and its not magnetically complex. Image by SDO/HMI. Geomagnetic activity is also at quiet levels today. A gentle coronal hole stream coupled with a possible incoming weak transient passage could help to boost the […] Read more
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It turns out last week’s bulletin ARLP028 did not get posted to the ARRL web site and did not go out via the usual channels. If you need a copy, check the bulletin archive link given at the end of this bulletin (perhaps tomorrow), or email a request to the author at k7ra@arrl.net. Over the past […] Read more
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No sunspots were observed since June 15, when the daily sunspot number was 11. This does not mean there were 11 sunspots seen, but instead it means that one sunspot group was observed containing one sunspot. The sunspot number is derived by assigning 10 points for each sunspot group, and one point for each sunspot. […] Read more
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Sunspots made a solid reappearance over this reporting week (June 4-10) with average daily sunspot number rising from 3.3 to 14. As expected, solar flux also increased, and the average daily 10.7 cm solar flux rose from 69.6 to 71.3. With renewed solar activity, so many radio amateurs staying home, and the increasing popularity of […] Read more
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A new sunspot is emerging over the sun’s southeastern limb. Provisionally numbered AR2765, it is inset in this magnetic map of the sun’s surface from NASA’s Solar Dynamics Observatory: AR2765 is a member of new Solar Cycle 25. We know this because of its magnetic polarity. According to Hale’s Law, sunspots switch polarities from one solar […] Read more
