:Product: Weekly Highlights and Forecasts
:Issued: 2017 Mar 13 0238 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
06 - 12 March 2017

Solar activity was at very low levels throughout the reporting
period. No CMEs observed in available SOHO LASCO imagery were
determined to be Earth-directed.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels on 06-08 Mar. Normal to high levels were observed on 09
Mar and moderate to high levels were observed on 10 Mar. On 11 Mar,
a return to normal to high levels were observed, with moderate to
high levels ending the period on 12 Mar. Sustained levels of
electron flux was caused by continuous influence of a CH HSS
throughout the reporting period.

Geomagnetic field activity ranged from quiet to G1 (Minor) levels
during the reporting period due to a negative polarity, CH HSS that
persisted throughout most of the week. On 06 Mar, quiet to G1
(Minor) levels represented a peak in geomagnetic activity caused by
650 km/s solar wind speeds, the highest levels observed from the CH
HSS. A very gradual decline in solar wind speeds caused unsettled to
active conditions on 07 Mar followed by quiet to active levels on
08-10 Mar. Quiet to unsettled conditions were observed on 11 Mar. An
isolated period of active conditions, associated with a sustained
period of southward Bz, was observed early on 12 Mar which quickly
transitioned to quiet conditions for the rest of the day.

Forecast of Solar and Geomagnetic Activity
13 March - 08 April 2017

Solar activity is expected to be at very low levels throughout the
outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at high levels on 13-17 Mar, 19-20 Mar, 24 Mar, and
29 Mar - 08 Apr due to influences from multiple, recurrent, CH HSSs.
Normal to moderate levels are expected on 18 Mar, 21-23 Mar, and 25
Mar-28 Mar.

Geomagnetic field activity is expected to be at quiet to G2
(Moderate) levels over the next 27 days. Unsettled conditions are
likely on 13-17 Mar, 19 Mar, 22 Mar, 24 Mar, 01 Apr, 03-05 Apr and
08 Apr. Active conditions are likely on 18 Mar, 23 Mar, 01 Apr, and
03-05 Apr. G1 (Minor) conditions are likely on 30-31 Mar and 02 Apr.
G2 (Moderate) conditions are likely on 28-29 Mar. All enhancements
in geomagnetic activity are due to the influences of multiple,
anticipated, recurrent CH HSSs. Mostly quiet conditions are likely
for the remaining days of the outlook period.