Viewing archive of Saturday, 28 September 2013

Solar activity report

Report of Solar-Geophysical Activity 2013 Sep 28 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 271 Issued at 2200Z on 28 Sep 2013

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 4 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low with a chance for a C-class flares on days one, two, and three (29 Sep, 30 Sep, 01 Oct).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
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 326 km/s at 27/2121Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (29 Sep, 30 Sep) and quiet to active levels on day three (01 Oct).
III. Event Probabilities 29 Sep to 01 Oct
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       28 Sep 106
  Predicted   29 Sep-01 Oct 110/110/110
  90 Day Mean        28 Sep 111

V. Geomagnetic A Indices
  Observed Afr/Ap 27 Sep  002/003
  Estimated     Afr/Ap 28 Sep  003/003
  Predicted    Afr/Ap 29 Sep-01 Oct  007/008-007/010-010/012

VI. Geomagnetic Activity Probabilities 29 Sep to 01 Oct
A. Middle Latitudes
Active10%15%30%
Minor storm01%05%10%
Major-severe storm01%01%01%
B. High Latitudes
Active20%15%15%
Minor storm20%25%30%
Major-severe storm10%25%40%

<< 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:2019/09/28Kp5 (G1)
Number of spotless days in 2019:214
Current stretch spotless days:16

This day in history*

Solar flares
11998M2.4
22014M1.6
32001C8.5
42013C8.4
52014C6.7
ApG
1199532G3
2199627G1
3200325G1
4201519G1
5201415
*since 1994

Social networks