Viewing archive of Saturday, 2 September 2017

Solar activity report

Report of Solar-Geophysical Activity 2017 Sep 02 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 245 Issued at 2200Z on 02 Sep 2017

IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z

Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C7 event observed at 02/1541Z from Region 2672 (N08W98). There are currently 4 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with a slight chance for an M-class flare on days one, two, and three (03 Sep, 04 Sep, 05 Sep).
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field has been at quiet to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 721 km/s at 02/0239Z. Total IMF reached 9 nT at 01/2335Z. The maximum southward component of Bz reached -7 nT at 02/0326Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 7573 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on day one (03 Sep) and quiet to unsettled levels on days two and three (04 Sep, 05 Sep).
III. Event Probabilities 03 Sep to 05 Sep
Class M 15%15%15%
Class X 01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       02 Sep 100
  Predicted    03 Sep-05 Sep 101/101/098
  90 Day Mean        02 Sep 077

V. Geomagnetic A Indices
  Observed Afr/Ap 01 Sep  017/017
  Estimated     Afr/Ap 02 Sep  020/028
  Predicted     Afr/Ap 03 Sep-05 Sep  013/015-007/010-007/008

VI. Geomagnetic Activity Probabilities 03 Sep to 05 Sep
A. Middle Latitudes
Active25%20%15%
Minor storm 10%05%05%
Major-severe storm 01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm 20%25%20%
Major-severe storm 20%25%20%

<< Go to daily overview page

Latest news

Support 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!

100%

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/09/02Kp5 (G1)
Number of spotless days in 2019:191
Current stretch spotless days:21

This day in history*

Solar flares
11998M7.1
22014M2.3
32011M1.9
42011M1.6
52011M1.6
ApG
1200141G2
2199928G2
3199627G1
4200716
5200315
*since 1994

Social networks