Joint USAF/NOAA Report of Solar and Geophysical Activity 20 Mar 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Mar 20 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 080 Issued at 2200Z on 20 Mar 2008

IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity was very low. The visible solar disk was spotless.

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

IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: The geomagnetic field was quiet to unsettled, with a brief active period from 12Z-15Z. The greater than 2 MeV electrons at geosynchronous orbit reached high levels again today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be generally quiet for the forecast period.

III. Event Probabilities 21 Mar-23 Mar

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

IV. Penticton 10.7 cm Flux

• Observed 20 Mar 068
• Predicted 21 Mar-23 Mar 070/070/070
• 90 Day Mean 20 Mar 072

V. Geomagnetic A Indices

• Observed Afr/Ap 19 Mar 005/006
• Estimated Afr/Ap 20 Mar 007/010
• Predicted Afr/Ap 21 Mar-23 Mar 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 21 Mar-23 Mar

A. Middle Latitudes

• Active 10/10/10
• Minor storm 05/05/05
• Major-severe storm 01/01/01

B. High Latitudes

• Active 10/10/10
• Minor storm 05/05/05
• Major-severe storm 01/01/01