Viewing archive of Friday, 13 September 2013
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 2013 Sep 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 256 Issued at 2200Z on 13 Sep 2013IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 3 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (14
Sep, 15 Sep, 16 Sep).
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
603 km/s at 13/0108Z. Total IMF reached 10 nT at 13/1603Z. The maximum
southward component of Bz reached -7 nT at 13/1525Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 178 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is likely to
to be at quiet to unsettled levels on day one (14 Sep) with a chance for
active conditions, mostly quiet levels on day two (15 Sep) and likely to
be at active levels on day three (16 Sep) with a slight chance for minor
storm conditions.
III. Event Probabilities 14 Sep to 16 Sep
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Sep 092 Predicted 14 Sep-16 Sep 100/100/100 90 Day Mean 13 Sep 113
V. Geomagnetic A Indices
Observed Afr/Ap 12 Sep 005/007 Estimated Afr/Ap 13 Sep 008/011 Predicted Afr/Ap 14 Sep-16 Sep 008/010-005/005-013/015
VI. Geomagnetic Activity Probabilities 14 Sep to 16 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 05% | 50% |
| Minor storm | 05% | 01% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 15% |
| Minor storm | 35% | 15% | 35% |
| Major-severe storm | 25% | 05% | 45% |
Latest news
Monday, 22 April 2024
Lot's of sunspots! Big chance for major flare activity?
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Latest forum messages
What are these long and thin eruptions? 1AR 3637, 3638, 3643 89Unproven theories 341Space Weather Memes 338Filaments and prominences 55
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/03/28 | X1.1 |
| Last M-flare | 2024/04/25 | M1.0 |
| Last geomagnetic storm | 2024/04/19 | Kp7 (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |
| Last 30 days | 133.9 +26.6 |