:Product: 20010626RSGA.txt :Issued: 2001 Jun 26 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Environment Center and the U.S. Air Force. # Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 177 Issued at 2200Z on 26 Jun 2001 IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was low. The largest event was a long-duration, optically uncorrelated C7 x-ray flare. This flare most likely originated from behind the southeast limb and was probably associated with a large CME observed in the SOHO/LASCO instrument. The remainder of the period was typified by small C-class subflares and a general decay of the observable sunspot regions. No new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to be predominantly low. IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field was quiet with unsettled and active periods observed at higher latitudes. The greater that 2 MeV electron flux reached high levels. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to range from quiet to active over the next three days. A high speed stream from a recurrent coronal hole should reach the Earth late on the first day of the period and continue over days two and three. The greater than 2 MeV electron flux is expected to remain at high levels, at least through the first day of the period. III. Event Probabilities 27 Jun-29 Jun Class M 30/30/40 Class X 01/01/05 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 26 Jun 168 Predicted 27 Jun-29 Jun 160/160/155 90 Day Mean 26 Jun 171 V. Geomagnetic A Indices Observed Afr/Ap 25 Jun 007/008 Estimated Afr/Ap 26 Jun 008/011 Predicted Afr/Ap 27 Jun-29 Jun 010/015-015/020-015/020 VI. Geomagnetic Activity Probabilities 27 Jun-29 Jun A. Middle Latitudes Active 20/25/25 Minor storm 05/10/10 Major-severe storm 01/01/01 B. High Latitudes Active 25/30/30 Minor storm 10/15/15 Major-severe storm 01/01/01