[ips-sf] IPS Summary Forecast for 05 May - issued 2330UT/04-May-2015

rwc rwc at ips.gov.au
Tue May 5 09:30:45 EST 2015

Solar activity was low during May 4. Active Region (AR) 2335 includes
the largest sunspot group on the visible solar disk and produced the
largest flare of the day, a C8.0 event peaking at 00:52 UT. AR 2335
will rotate into the geoeffective zone late this week. AR 2322 is
located on the far side and was previously a source of M class flares
and CMEs. This region will start to rotate around the north east limb
into view today. H alpha images show a succession of dark filaments
(solar prominences) straddling the geoeffective zone in the Southern
Hemisphere. A slow halo CME was launched toward the east during May 2.
This CME is expected to drive active geomagnetic conditions during May
6-7. Aurora watchers should enter standby mode in case a minor
geomagnetic storm eventuates. The solar wind speed is presently about
370 km/s. Conditions for HF radio wave propagation are expected to
remain near normal during May 5.

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