Joint USAF/NOAA Report of Solar and Geophysical Activity 10 June 2010

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 161 Issued at 2200Z on 10 Jun 2010

IA. Analysis of Solar Active Regions and Activity from 09/2100Z
to 10/2100Z: Solar activity has been at very low levels for the past
24 hours. New Region 1080 (S25W39) was numbered early in the period
today and is a beta magnetic classification. Region 1078 (S22W73)
remained stable throughout the period.

IB. Solar Activity Forecast: Solar activity is expected to be at
very low levels with a slight chance for C-class events.

IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z:
The geomagnetic field has been at quiet levels for the past 24 hours.
Observations made from the ACE spacecraft indicated the arrival of a
weak coronal hole high-speed stream, with an increase in solar wind
speeds from 305 km/s to 461 km/s. The greater than 2 MeV electron
flux at geosynchronous orbit was at high levels during the past 24
hours.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at quiet levels for the next three days (11-13 June).

III. Event Probabilities 11 Jun-13 Jun
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green

IV. Penticton 10.7 cm Flux
Observed 10 Jun 073
Predicted 11 Jun-13 Jun 072/070/070
90 Day Mean 10 Jun 077

V. Geomagnetic A Indices
Observed Afr/Ap 09 Jun 003/004
Estimated Afr/Ap 10 Jun 006/006
Predicted Afr/Ap 11 Jun-13 Jun 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 11 Jun-13 Jun
A. Middle Latitudes
Active 10/10/10
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor storm 01/01/01
Major-severe storm 01/01/01