Viewing archive of Sunday, 13 July 2003
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2003 Jul 13 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.comJoint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 194 Issued at 2200Z on 13 Jul 2003
IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z
Solar activity was low. Today's activity consisted of a
few, low-level C-class subflares. Newly assigned Region 409 (N16E66)
rotated more fully into view today and was one of the most active
regions. This group is currently the largest on the disk and was the
source of recent flare activity observed on and near the northeast
limb during the last couple of days. Region 401 (S10W31) showed some
development of new spots in the central part of the group but was
stable and quiet. Two additional regions were assigned today: Region
408 (N13E23), a small newly emerged group, and Region 410 (S13E63),
also a small group that has just rotated into view. A thirteen
degree filament located near N26W08 disappeared between 0100-0900
UTC. Post-eruption arcades were visible in SXI and EIT-195 images.
IB. Solar Activity Forecast
Solar activity is expected to be
mostly low, but there is a chance for an isolated M-class event over
the next three days, with Regions 409 and 401 the most likely
sources.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic field was unsettled to active during the past 24
hours. Solar wind speeds remain somewhat elevated today (around
500-600 km/s), but are lower than yesterday and show an overall
declining trend. The greater than 2 MeV electron fluxes were at high
levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly active over the next three days. Some
persistence of today's activity is expected to linger into tomorrow.
It is possible that transient flow may arrive sometime during the
next three days from the M3 flare of 10 July or from any of the
recent filament eruptions. However, ACE EPAM data do not indicate
the presence of a strong interplanetary shock at this time, making
transient drivers seem less probable than previously. The onset of
effects from another high speed wind stream are expected on day two
or day three as a new coronal hole will be rotating into favorable
position.
III. Event Probabilities 14 Jul to 16 Jul
Class M | 40% | 40% | 40% |
Class X | 05% | 05% | 05% |
Proton | 05% | 05% | 05% |
PCAF | green
|
IV. Penticton 10.7 cm Flux
Observed 13 Jul 127
Predicted 14 Jul-16 Jul 130/130/130
90 Day Mean 13 Jul 125
V. Geomagnetic A Indices
Observed Afr/Ap 12 Jul 025/046
Estimated Afr/Ap 13 Jul 015/015
Predicted Afr/Ap 14 Jul-16 Jul 020/020-020/030-020/025
VI. Geomagnetic Activity Probabilities 14 Jul to 16 Jul
A. Middle Latitudes |
Active | 35% | 35% | 35% |
Minor storm | 20% | 20% | 20% |
Major-severe storm | 10% | 10% | 10% |
B. High Latitudes |
Active | 35% | 35% | 35% |
Minor storm | 25% | 25% | 25% |
Major-severe storm | 15% | 15% | 15% |
All times in UTC
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