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Here is this week's space weather and geophysical report, issued 2015 Mar 30 0340 UTC.
Highlights of Solar and Geomagnetic Activity
23 - 29 March 2015
Solar activity was low throughout the period. Region 2305 (S08,
L=009 class/area Eki/410 on 27 Mar) produced the largest event of
the period, a C8/1n at 25/0446 UTC as well as several low-level
C-class flares during the week. Regions 2303 (N19, L=067 class/area
Hsx/120 on 21 Mar), 2309 (N15, L=072 class/area Dao/080 on 28 Mar),
2310 (N05, L=358 class/area Cao/020 on 23 Mar) and 2312 (N08, L=348
class/area Cao/030 on 25 Mar) also produced C-class events during
the period. A large eruptive prominence on the northeastern limb was
observed in SDO/AIA 304 imagery lifting off from approximately
27/1039 UTC to 27/1539 UTC but was determined not to be
geoeffective. An approximately five degree long filament, centered
near S23E50, was observed in Gong H-alpha imagery lifting off the
solar disk from 28/1543 UTC to 28/1610 UTC but the CME was directed
well off the Sun-Earth line.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels from 23 Mar to 28 Mar. Normal to moderate levels were
observed on 29 Mar.
Geomagnetic field activity was at unsettled to minor storm levels on
23 Mar due to elevated solar wind velocities and a slightly extended
period of negative Bz. Quiet to active levels were observed on 24-25
Mar due to influence from a positive polarity coronal hole high
speed stream (CH HSS). Quiet to unsettled conditions were dominant
from 26-28 Mar. Quiet to active levels returned on 29 Mar due to a
prolonged period of negative Bz.
Forecast of Solar and Geomagnetic Activity
30 March - 25 April 2015
Solar activity is expected to be at low levels from 30-31 Mar.
Moderate levels are likely from 01-14 Apr with the return of Regions
2302 (N12, L=189) and 2297 (S17, L=196). Predominately low levels
are expected from 15 April through the end of the period.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at normal to moderate levels with the exception of 31
Mar - 01 Apr, 03-06 Apr, and 14-18 Apr due to effects from recurrent
coronal hole high speed streams (CH HSS).
Geomagnetic field activity is expected to reach minor storm levels
on 30-31 Mar due to effects from a southern polar CH HSS. Unsettled
to active conditions are expected on 01 Apr as HSS effects subside.
Mostly unsettled conditions are expected from 02-04 Apr with active
conditions likely on 03 Apr. Quiet to unsettled conditions are
expected from 05-11 Apr. Unsettled to active conditions are expected
to return from 12-20 Apr due to effects from a negative CH HSS
followed by a positive CH HSS with minor storms likely on 13-16 Apr
and 18-19 Apr. Mostly quiet levels are expected from 21-24 Apr.
Unsettled to active conditions are expected with minor storms
possible on 25 Apr due to CH HSS effects.
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![Weekly Propagation Summary - 2015 Mar 30 16:10 UTC]()
Live data and images: SunSpotWatch.com
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