PropagationLong distance low and medium frequency (below 2 MHz) propagation along paths due west over high and middle latitudes is good. Propagation on long distance northeast-southwest paths is poor.
The geomagnetic field is expected to be quiet on October 14-19.
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Solar Terrestrial Activity Report
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Product: Weekly Highlights and Forecasts
:Issued: 2009 Oct 13 2021 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact: www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
05 - 11 October 2009
Solar activity was very low. No flares were detected. The visible disk was spotless.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels during the period.
Geomagnetic field activity was at quiet levels at all latitudes during 05 - 10 October. Activity increased to quiet to unsettled levels on 11 October. A geomagnetic sudden impulse (SI) occurred at 11/0042 UTC (09 nT, as measured by the Boulder USGS magnetometer).
ACE solar wind observations indicated the unsettled conditions and SI on 11 October were associated with the onset of a recurrent coronal hole high-speed stream (CH HSS). The CH HSS commenced early on 11 October. Velocities increased to a peak of 463 km/sec at 11/1901 UTC. IMF changes associated with the onset of the CH HSS included increased Bt (peak 16 nT at 11/0558 UTC) and intermittent periods of southward Bz (minimum -10 nT at 11/0636 UTC).
Forecast of Solar and Geomagnetic Activity
14 October - 09 November 2009
Solar activity is expected to be very low.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal levels through the period.
Geomagnetic field activity is expected to be at quiet levels on 14 October. Activity is expected to increase to quiet to unsettled levels during 15 - 16 October due to a coronal hole high-speed
stream (CH HSS). Quiet conditions are expected during 17 - 23 October. Another round of quiet to unsettled conditions are expected during 24 - 25 October due to a recurrent CH HSS. Quiet conditions are expected during the remainder of the period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2009 Oct 13 2021 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact: www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2009 Oct 13
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2009 Oct 14 70 5 2
2009 Oct 15 70 7 3
2009 Oct 16 72 7 3
2009 Oct 17 72 5 2
2009 Oct 18 72 5 2
2009 Oct 19 72 5 2
2009 Oct 20 72 5 2
2009 Oct 21 72 5 2
2009 Oct 22 72 5 2
2009 Oct 23 72 5 2
2009 Oct 24 72 8 3
2009 Oct 25 72 8 3
2009 Oct 26 72 5 2
2009 Oct 27 72 5 2
2009 Oct 28 72 5 2
2009 Oct 29 72 5 2
2009 Oct 30 72 5 2
2009 Oct 31 70 5 2
2009 Nov 01 70 5 2
2009 Nov 02 69 5 2
2009 Nov 03 69 5 2
2009 Nov 04 69 5 2
2009 Nov 05 69 5 2
2009 Nov 06 70 5 2
2009 Nov 07 70 5 2
2009 Nov 08 70 5 2
2009 Nov 09 70 5 2
(NOAA)