Viewing archive of Tuesday, 14 June 2011
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 2011 Jun 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 165 Issued at 2200Z on 14 Jun 2011IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z Solar activity was at low levels during the period. New
Region 1236 (N17E64) rotated onto the disk as a D-type spot group
and produced two low-level C-class events. A north-south oriented
filament channel, located near the SE limb, erupted during the
period. SDO/AIA 193 imagery revealed material movement along the
large channel, first visible at 14/0609Z, and movement continued
through about 14/1500Z. Associated with the filament eruption was a
partial halo CME off the east limb, first visible in STEREO-Behind
COR2 imagery at 14/0810Z. A plane-of-sky velocity was estimated at
about 750 km/s. This CME does not appear to be Earth-directed.
IB. Solar Activity Forecast
Solar activity is expected to be at
low levels with a slight chance for an M-class event all three days
of the forecast period (15 - 17 June).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field was at quiet to unsettled levels with an
isolated active period observed between 14/0900 - 1200Z. This
activity was due to continued effects from a recurrent coronal hole
high speed stream. During the period, solar wind velocities rose
steadily from near 450 km/s to about 550 km/s. The Bz component of
the interplanetary magnetic field varied between +/- 8 nT while Bt
varied between 5 and 10 nT. The greater than 10 MeV proton
enhancement, present since 11 June, decayed to background levels
early on 14 June.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels for day one (15 June),
with a chance for active levels due to continued high speed stream
effects. Activity is expected to decrease to mostly quiet levels on
days two and three (16 - 17 June) as high speed stream effects
subside.
III. Event Probabilities 15 Jun to 17 Jun
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Jun 099 Predicted 15 Jun-17 Jun 100/105/105 90 Day Mean 14 Jun 103
V. Geomagnetic A Indices
Observed Afr/Ap 13 Jun 006/008 Estimated Afr/Ap 14 Jun 008/008 Predicted Afr/Ap 15 Jun-17 Jun 008/008-005/005-005/007
VI. Geomagnetic Activity Probabilities 15 Jun to 17 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 05% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 05% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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