:Product: Weekly Highlights and Forecasts
:Issued: 2018 Jun 18 0349 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
11 - 17 June 2018

Solar activity was very low with only low level B-class flare
activity observed from Region 2713 (N06, L=285, class/area Bxo/060
on 13 Jun). No Earth-directed CMEs were observed in satellite
imagery. 

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 11-13 Jun and decreased to moderate levels on 14-17
Jun. The largest flux of the period was 1,840 pfu observed at
11/1945 UTC. 

Geomagnetic field activity was at quiet levels under a nominal solar
wind regime. Solar wind speed ranged from approximately 280 km/s to
340 km/s through the majority of the period with total field at or
below 6 nT. At approximately 17/1250 UTC, a solar sector boundary
crossing was observed from a negative to a positive orientation. A
corresponding increase in total field to around 14 nT was observed
at 17/2355 UTC along with an increase in solar wind speed to near
415 km/s. This indicated the arrival of a CIR preceding a positive
polarity coronal hole high speed stream (CH HSS). 

Forecast of Solar and Geomagnetic Activity
18 June - 14 July 2018

Solar activity is expected to be at very low levels with a slight
chance for C-class flares from 18 Jun-01 Jul with the return of old
Region 2712 (N15, L=176). Very low levels are expected for the rest
of the forecast 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 28 Jun-10 Jul due to CH HSS
influence. 

Geomagnetic field activity is expected to be at unsettled to active
levels on 18-19, 24-25, and 27-30 Jun with G1 (Minor) storm levels
expected on 18 Jun and 28-29 Jun due to recurrent CH HSS activity.