:Product: Weekly Highlights and Forecasts
:Issued: 2016 Jun 06 0156 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
30 May - 05 June 2016

Solar activity ranged from very low to low levels. Low activity was
observed on 30 May with a pair of C1/Sf flares observed from Region
2550 (N15, L=114, class/area Cro/020 on 31 May). Very low levels
were observed on 31 May and 01-05 Jun. Of note, the first spotless
day since 17 Jul 2014 was observed on 03 Jun.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels on 30 May - 04 Jun with moderate levels observed on 05
Jun.

Geomagnetic field activity ranged from quiet to minor storm
(G1-Minor) levels. Quiet to active levels were observed on 30-31 May
due to negative polarity coronal hole high speed stream (CH HSS)
influence. During this time frame, wind speeds peaked at about 575
km/s early on 30 May while the Bz component of the interplanetary
magnetic field reached a maximum southward of extent of -6 nT late
on 31 May. Quiet conditions were observed on 01 Jun through midday
on 05 Jun. Active to G1 storm levels were observed through the
remainder of 05 Jun due to effects from another negative polarity CH
HSS. Late on 05 Jun, wind speeds approached 650 km/s, total field
reached 19 nT while the Bz component briefly hit a maximum southward
extent of -15 nT.



Forecast of Solar and Geomagnetic Activity
06 June - 02 July 2016

Solar activity is expected to be at very low levels with C-class
activity possible 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 reach high levels on 07-09, 12-16, 26-30 Jun and 01
Jul. Normal to moderate levels are expected throughout the remainder
of the outlook period.

Geomagnetic field activity is likely to reach G1 (Minor) levels on
06 Jun and 02 Jul with unsettled to active levels expected on 12-15,
17-18, 23-24 and 26-27 Jun, all due to the influence of multiple
recurrent CH HSSs. Quiet to unsettled conditions are expected
throughout the remainder of the outlook period under a nominal solar
wind regime.