:Product: Weekly Highlights and Forecasts
:Issued: 2001 Jul 04 2112 UT
Highlights of Solar and Geomagnetic Activity
25 June - 01 July 2001

Solar activity was low during most of the period, briefly dipping to
very low levels on 
30 June. Isolated C-class subflares occurred.
The active regions were largely unremarkable and a trend of
decreasing activity occurred during the latter half of the period.
At the close of the period, the disk was populated by small, simple
sunspot groups; all of which were stable.

Data were available from the Advanced Composition Explorer (ACE)
spacecraft for most of the period. A relatively weak high speed
stream was observed during 26 - 27 June associated with a
negative-polarity coronal hole. Velocities began to gradually
increase around midday on 26 June, and reached a peak near 530
km/sec early on 27 June followed by a gradual decrease during the
rest of the day. IMF Bz varied from plus 06 to minus 08 nT (GSM)
during this stream. There were no significant disturbances detected
during the rest of the period.

There were no proton events during the period.

The greater than 2 MeV electron flux at geosynchronous orbit was at
moderate to high levels during 25 - 26 June, then decreased to
normal to moderate levels for the remainder of the period.

Geomagnetic field activity was at unsettled to active levels during
26/1800 - 27/0600 UTC due to coronal hole effects. Unsettled to
active levels also occurred during 30/0900 - 1500 UTC associated
with a period of sustained southward IMF Bz. Quiet to unsettled
conditions occurred during the rest of the period.

Forecast of Solar and Geomagnetic Activity
04 - 30 July 2001

Solar activity is expected to range from low to moderate levels.
Isolated M-class flares are will be possible during the period.
There will be a slight chance for a major flare during the period.

There will be a slight chance for a proton event during the period.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at normal to moderate levels during most of the
period. However, there will be a chance for high levels around 17 -
18 July.

The geomagnetic field is expected to be at quiet to unsettled levels
during most of the period, barring an Earth-directed CME. However,
active periods will be possible during 16 - 17 July.


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