Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 291 Issued at 2200Z on 18 Oct 2005 IA. Analysis of Solar Active Regions and Activity from 17/2100Z to 18/2100Z: Solar activity was very low. No solar flares were observed during the past 24 hours.

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

IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z:

The geomagnetic field was quiet to unsettled.

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

III. Event Probabilities 19 Oct-21 Oct

Class M 01/01/01

Class X 01/01/01

Proton 01/01/01

PCAF green

IV. Penticton 10.7 cm Flux

Observed 18 Oct 078

Predicted 19 Oct-21 Oct 080/080/080

90 Day Mean 18 Oct 088

V. Geomagnetic A Indices

Observed Afr/Ap 17 Oct 007/013

Estimated Afr/Ap 18 Oct 008/008

Predicted Afr/Ap 19 Oct-21 Oct 005/008-005/008-005/005 VI. Geomagnetic Activity Probabilities 19 Oct-21 Oct A. Middle Latitudes

Active 15/15/15

Minor storm 10/10/10

Major-severe storm 01/01/01

B. High Latitudes

Active 20/20/20

Minor storm 10/10/10

Major-severe storm 05/05/05