:Product: Weekly Highlights and Forecasts
:Issued: 2002 Jun 18 2212 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Environment Center
# Product description and SEC contact on the Web
# http://www.sec.noaa.gov/weekly.html
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
10 - 16 June 2002

Solar activity was low during most of the period with isolated B- and
C-class flares. X-ray background levels were B-class throughout the
period (and have been so since 03 June). Regions 9987 and 9991 were
the sunspot groups of interest, both of which produced isolated B-
and C-class flares. Region 9987 (S15, L = 144, class/area Eki/420 on
11 June) was moderate in size and magnetic complexity and was in a
gradual growth phase until 11 June. However, it began to gradually
decay on 12 June. Region 9991 (S22, L = 084, class/area Cko/350 on
14 June) was a reversed-polarity region with minor spot growth noted
during 11 – 12 June. It began a gradual decay phase on 13 June.

Solar wind data were available from the NASA Advanced Composition
Explorer (ACE) spacecraft for most of the summary period. Wind
velocities increased early on 10 June with peaks to around 540
km/sec, then decreased to nominal readings by the end of the day.
This increase may have been a result of weak coronal hole effects.
No significant disturbances occurred during the rest of the period.

There were no proton events during the period.

Greater than 2 MeV electron fluxes at geo-synchronous orbit were at
normal to moderate levels.

Geomagnetic field activity was at quiet to active levels on 10 June,
possibly due to weak coronal hole effects. Quiet to unsettled
conditions prevailed during the rest of the period.

Forecast of Solar and Geomagnetic Activity
19 June - 15 July 2002

Solar activity is expected to be at low levels during most of the
period. There is a chance for isolated low-level M-class flares
during 23 June – 06 July.

No proton events are expected.

Greater than 2 MeV electron fluxes at geo-synchronous orbit are
expected to be at normal to moderate levels for most of the period.

Quiet to unsettled levels are expected for most of the period.
However, active conditions are possible around 20 - 21 and 29 June,
and again during 6 – 7 July.


.