:Issued: 2018 Apr 02 0443 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 26 March - 01 April 2018
Solar activity was mostly at very low levels with the exception of
30 Mar when an isolated C4/Sf flare was observed at 30/0804 UTC from
Region 2703 (S08, L=193, class/area Axx/010 on 31 Mar). Associated
with the flare was a Type II radio sweep (805 km/s) and a coronal
mass ejection (CME) off the east limb first observed at 30/0840 UTC
in SOHO/LASCO C2 imagery. No Earth-directed CMEs 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 throughout the period with a maximum flux of 43,750 pfu
observed at 28/2045 UTC.
Geomagnetic field activity began the period under continued effects
from a negative polarity coronal hole high speed stream (CH HSS).
Solar wind speed ranged from approximately 450-550 km/s on 26-27 Mar
with total field between 2-8 nT. By 28-29 Mar, solar wind speeds
slowly returned to nominal levels while a solar sector boundary
crossing was observed around 29/0710 UTC into a positive sector.
Solar wind speed showed a slight increase in speed to 380-480 km/s
from 30 Mar-01 Apr with total field variable between 2-9 nT
suggesting possible intermittent connections with a northern polar
extension positive polarity CH HSS. The geomagnetic field was mostly
quiet with periods of unsettled activity observed on 26-27 Mar and
again on 31 Mar.
FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 02 APRIL - 28 APRIL 2018
Solar activity is expected to be at very low levels with a slight
chance for a C-class flare from 02-10 Apr due to potential further
activity from Region 2703. Very low levels are expected through the
rest of the period.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at moderate to high levels on 02-04 and 12-28 Apr due
to CH HSS influence.
Geomagnetic field activity is expected to be at unsettled to active
levels on 05-07, 10-16, 18-23 Apr with G1 (Minor) storm levels
likely on 12 Apr due to recurrent CH HSS activity.
:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2018 Apr 02 0443 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 2018-04-02
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2018 Apr 02 69 5 2
2018 Apr 03 69 5 2
2018 Apr 04 69 5 2
2018 Apr 05 69 8 3
2018 Apr 06 69 8 3
2018 Apr 07 69 8 3
2018 Apr 08 69 5 2
2018 Apr 09 69 5 2
2018 Apr 10 68 10 3
2018 Apr 11 68 15 4
2018 Apr 12 68 20 5
2018 Apr 13 68 18 4
2018 Apr 14 68 18 4
2018 Apr 15 68 15 4
2018 Apr 16 68 10 3
2018 Apr 17 68 5 2
2018 Apr 18 68 8 3
2018 Apr 19 68 15 4
2018 Apr 20 68 15 4
2018 Apr 21 68 15 4
2018 Apr 22 68 12 4
2018 Apr 23 69 10 3
2018 Apr 24 69 5 2
2018 Apr 25 69 5 2
2018 Apr 26 69 5 2
2018 Apr 27 69 5 2
2018 Apr 28 69 5 2
(SWPC via DXLD)
