Joint USAF/NOAA Report of Solar and Geophysical Activity 08 Apr 2005

Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.
Updated 2005 Apr 08 2210 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 098 Issued at 2200Z on 08 Apr 2005

IA. Analysis of Solar Active Regions and Activity from 07/2100Z
to 08/2100Z: Solar activity was very low. New Region 751 (S08W59)
was numbered today.

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

IIA. Geophysical Activity Summary 07/2100Z to 08/2100Z:
The geomagnetic field was quiet. The greater than 2 MeV flux at
geosynchronous orbit was at high levels today.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to unsettled.

III. Event Probabilities 09 Apr-11 Apr

• Class M 05/05/05
• Class X 01/01/01
• Proton 01/01/01
• PCAF green

IV. Penticton 10.7 cm Flux

• Observed 08 Apr 088
• Predicted 09 Apr-11 Apr 085/085/085
• 90 Day Mean 08 Apr 096

V. Geomagnetic A Indices

• Observed Afr/Ap 07 Apr 004/008
• Estimated Afr/Ap 08 Apr 005/005
• Predicted Afr/Ap 09 Apr-11 Apr 005/008-005/008-005/010

VI. Geomagnetic Activity Probabilities 09 Apr-11 Apr

A. Middle Latitudes

• Active 15/15/15
• Minor storm 05/05/05
• Major-severe storm 01/01/01

B. High Latitudes

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