Viewing archive of Wednesday, 30 December 2015
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 2015 Dec 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 364 Issued at 2200Z on 30 Dec 2015IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
30/1905Z from Region 2473 (S21W47). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (31 Dec, 01 Jan,
02 Jan).
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 398 km/s at
30/0038Z. Total IMF reached 5 nT at 30/1819Z. The maximum southward
component of Bz reached -4 nT at 29/2106Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 1656 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to severe storm levels on day one (31 Dec), unsettled
to minor storm levels on day two (01 Jan) and unsettled to active levels
on day three (02 Jan). Protons have a slight chance of crossing
threshold on days one, two, and three (31 Dec, 01 Jan, 02 Jan).
III. Event Probabilities 31 Dec to 02 Jan
| Class M | 40% | 30% | 25% |
| Class X | 05% | 01% | 01% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Dec 102 Predicted 31 Dec-02 Jan 100/105/105 90 Day Mean 30 Dec 109
V. Geomagnetic A Indices
Observed Afr/Ap 29 Dec 004/004 Estimated Afr/Ap 30 Dec 008/017 Predicted Afr/Ap 31 Dec-02 Jan 028/046-020/024-015/018
VI. Geomagnetic Activity Probabilities 31 Dec to 02 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 45% | 40% |
| Minor storm | 35% | 25% | 20% |
| Major-severe storm | 50% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 01% | 05% | 10% |
| Minor storm | 10% | 25% | 25% |
| Major-severe storm | 90% | 65% | 60% |
All times in UTC
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