Welcome to space weather, issued by XMDV radio at Mon the 15 Dec 2025 at 18:59:28

In the last 24 hours Solar activity was at low levels with C-class flare activity observed. Region 4307 continued a trend of growth and was themain contributor of C-flare activity this period. A few new spotsemerged just north of Region 4308 , but it is notclear if these spots are part of 4308 or a separate region. Theremaining regions were mostly stable. No Earth-directed coronal mass ejections weredetected in available imagery. There is a chance for M-class flare activityover 15 to 17 december.

In the last 24 hours The greater than 2 mega electron volt electron flux reached moderate levels and thegreater than 10 mega electron volt proton flux remained steady at background levelsduring the period. The greater than 2 mega electron volt electron flux is expected to remain at normal tomoderate levels through 17 december. The greater than 10 mega electron volt proton flux isexpected to persist at background levels over 15 to 17 december.

In the last 24 hours Solar wind parameters suggested the waning influence from a negativepolarity coronal hole high speed stream. Total magnetic field strength reached 7 nano tesla, andthe Bz component ranged between + to to 4 nano tesla. Wind speeds slowly decreasedthroughout the period from a peak of ~575 kilometers per second to ~450 kilometers per second. Phi anglewas predominately negative throughout the period. Negative polarity coronal hole high speed stream influences are expected to subside on 15 Dec, with ambient solar wind conditions expected to prevail on 16 december. Thesolar wind environment is likely to become enhanced on 17 december due to theanticipated onset of another negative polarity coronal hole high speed stream.

In the last 24 hours The geomagnetic field was at quiet levels under waning negative polaritycoronal hole high speed stream influences. The geomagnetic field is expected to be mostly quiet over 15 to 16 december asany remnant negative polarity coronal hole high speed stream influences subside, and ambientsolar wind conditions prevail. Periods of active conditions are expectedon 17 december due to the anticipated onset of another negative polarity CHHSS.

This has been space weather, issued by XMDV radio at Mon the 15 Dec 2025 at 18:59:28

Space weather was created by William Greenwood with material from the N O double A