Joint USAF/NOAA Report of Solar and Geophysical Activity 31 May 2006

Product: Report of Solar-Geophysical Activity
Issued: 2006 May 31 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 151 Issued at 2200Z on 31 May 2006

IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity was very low. No new regions were numbered today.

IB. Solar Activity Forecast: Solar activity is expected to be very low.

IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field was quiet to unsettled.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to active for the next three days (01 – 03 June) with possible minor storm periods due to a recurrent coronal hole moving into geoeffective position.

III. Event Probabilities 01 Jun-03 Jun

• Class M 01/01/01
• Class X 01/01/01
• Proton 01/01/01
• PCAF green

IV. Penticton 10.7 cm Flux

• Observed 31 May 078
• Predicted 01 Jun-03 Jun 080/075/080
• 90 Day Mean 31 May 081

V. Geomagnetic A Indices

• Observed Afr/Ap 30 May 007/009
• Estimated Afr/Ap 31 May 006/012
• Predicted Afr/Ap 01 Jun-03 Jun 010/015-015/020-015/020

VI. Geomagnetic Activity Probabilities 01 Jun-03 Jun A. Middle Latitudes

• Active 20/25/25
• Minor storm 10/15/15
• Major-severe storm 01/05/05

B. High Latitudes

• Active 25/30/30
• Minor storm 15/20/20
• Major-severe storm 05/10/10