Product: Weekly Highlights and Forecasts
:Issued: 2008 Apr 01 2324 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts#
Highlights of Solar and Geomagnetic Activity 24 - 30 March 2008
Solar activity was very low for most of the week with the exception of 25 March which saw a period of moderate levels due to an M1/1f flare from Region 989 (S12, L=206, class/area, Cso/80 on 29 March) at 1856 UTC. The event was accompanied by a type II radio sweep and a coronal mass ejection from the east limb. The remainder of the week’s activity consisted of occasional B-class flares from Region 987 (S07, L=260, class/area, Dai/170 on 27 March) and Region 988 (S09, L=234, class/area, Dso/300 on 26 March).
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 25, 27-29 March and reached very high levels on 30 March.
The geomagnetic field was initially quiet on 24-25 March and early on 26 March. However, beginning around 0400 UTC on the 26th solar wind measurements at ACE indicated the onset of a co-rotating interaction region which was subsequently followed by a high speed stream from about 26/1330 UTC and lasting through the remainder of the week. Geomagnetic activity peaked between 26/0600 UTC through 28/1500 UTC with mostly unsettled to active levels at mid-latitudes and mostly minor to major storm levels at high latitudes. The interplanetary magnetic field at ACE was enhanced between about 26/0400 UTC through about 27/0000 UTC with peak Bz values around -7 nT. Peak solar wind velocities were observed on the 28th with maximum values around 680 km/s. Geomagnetic activity declined to mostly quiet to unsettled levels from 28/1500 UTC through the end of the period.
Forecast of Solar and Geomagnetic Activity
02 - 28 April 2008
Solar activity is expected to be very low for most of the forecast interval. There is a chance for an increase in activity levels with the return of Region 987 (S06, L=262) on 19 April, and Region 988 (S06, L = 237) on 21 April, although it is more likely that these regions will decay on the backside before they return.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels for 06-12 April and for 23-27 April in response to expected recurrent geomagnetic activity.
The geomagnetic field is expected to be quiet for 01-04 April. Activity is expected to increase to unsettled to active levels with a chance for some isolated storm periods for 05-09 April due to a coronal hole high speed stream. Quiet to unsettled levels are expected from 10-21 April, followed by an increase to unsettled to active levels with isolated storm periods for 22-25 April with the arrival of another recurrent high speed stream. Activity should decline to quiet to unsettled levels for the remainder of the period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2008 Apr 01 2324 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2008 Apr 01#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2008 Apr 02 75 5 2
2008 Apr 03 75 5 2
2008 Apr 04 75 10 3
2008 Apr 05 70 15 5
2008 Apr 06 70 15 4
2008 Apr 07 70 10 3
2008 Apr 08 70 15 4
2008 Apr 09 70 15 4
2008 Apr 10 70 10 3
2008 Apr 11 70 10 3
2008 Apr 12 70 5 2
2008 Apr 13 70 5 2
2008 Apr 14 70 5 2
2008 Apr 15 70 5 2
2008 Apr 16 75 5 2
2008 Apr 17 75 5 2
2008 Apr 18 80 5 2
2008 Apr 19 80 5 2
2008 Apr 20 80 5 2
2008 Apr 21 75 5 2
2008 Apr 22 75 20 5
2008 Apr 23 75 25 5
2008 Apr 24 75 15 4
2008 Apr 25 75 10 3
2008 Apr 26 75 10 3
2008 Apr 27 75 5 2
2008 Apr 28 75 5 2
(NOAA)
