Pages

Tuesday, August 07, 2007

Weekly radio propagation report


Product: Weekly Highlights and Forecasts
:Issued: 2007 Aug 07 2253 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Environment Center
# Product description and SEC contact on the Web
# http://www.sec.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
30 July - 05 August 2007

Solar activity was very low. No flares were observed during the
period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels during 01 - 05 August.

The geomagnetic field was at quiet to active levels on 30 July.
Activity decreased to quiet to unsettled levels on 31 July. Quiet to
active levels occurred on 01 August. Quiet to unsettled conditions
were observed during the rest of the period. ACE solar wind data
indicated the 30 July and 01 August activity was due to a recurrent
coronal hole high-speed wind stream. Solar wind velocities were
elevated during 30 July -
03 August with a peak velocity of 679
km/sec at 01/1839 UTC. IMF Bt reached a peak of 9.1 nT at
01/1055
UTC while IMF Bz reached a minimum of -6.9 nT at 01/1233 UTC during
the disturbance.
The high-speed stream subsided on 04 August.

Forecast of Solar and Geomagnetic Activity
08 August - 03 September 2007

Solar activity is expected to be at very low levels.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to reach high levels during 12 - 15 August and 28 August –
01 September.

The geomagnetic field is expected to be at quiet to unsettled levels
during 08 - 09 August. A recurrent coronal high-speed stream is
expected to disturb the field during 10 - 11 August with unsettled
to minor storm levels expected. Activity is expected to decrease to
mostly quiet levels during 12 - 15 August. Active periods are
expected during 16 - 17 August as another recurrent high-speed
stream affects the field. Quiet to unsettled conditions are expected
during 18 - 24 August. Activity is expected to increase to unsettled
to active levels on 25 August due to another recurrent coronal hole
high-speed stream. Quiet to unsettled levels are expected during 26
August - 02 September. Activity is expected to increase to unsettled
to minor storm levels on 03 September as another recurrent
high-speed stream disturbs the field.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2007 Aug 07 2253 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Environment Center
# Product description and SEC contact on the Web
# http://www.sec.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2007 Aug 07
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2007 Aug 08 70 10 3
2007 Aug 09 70 10 3
2007 Aug 10 70 25 5
2007 Aug 11 70 15 4
2007 Aug 12 70 5 2
2007 Aug 13 70 5 2
2007 Aug 14 70 5 2
2007 Aug 15 70 5 2
2007 Aug 16 65 12 4
2007 Aug 17 65 12 4
2007 Aug 18 65 5 2
2007 Aug 19 65 5 2
2007 Aug 20 65 5 2
2007 Aug 21 70 5 2
2007 Aug 22 70 10 3
2007 Aug 23 70 8 3
2007 Aug 24 70 5 2
2007 Aug 25 70 15 4
2007 Aug 26 70 10 3
2007 Aug 27 70 8 3
2007 Aug 28 70 10 3
2007 Aug 29 70 5 2
2007 Aug 30 70 5 2
2007 Aug 31 70 5 2
2007 Sep 01 70 5 2
2007 Sep 02 70 5 2
2007 Sep 03 70 20 5
(NOAA)