Viewing archive of Thursday, 4 July 2019

Solar activity report

Report of Solar-Geophysical Activity 2019 Jul 04 2200 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 185 Issued at 2200Z on 04 Jul 2019

IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z

Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low on days one, two, and three (05 Jul, 06 Jul, 07 Jul).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 418 km/s at 04/0133Z. Total IMF reached 7 nT at 04/1417Z. The maximum southward component of Bz reached -5 nT at 04/1917Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on day one (05 Jul), quiet to unsettled levels on day two (06 Jul) and quiet levels on day three (07 Jul).
III. Event Probabilities 05 Jul to 07 Jul
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       04 Jul 068
  Predicted   05 Jul-07 Jul 068/068/068
  90 Day Mean        04 Jul 071

V. Geomagnetic A Indices
  Observed Afr/Ap 03 Jul  006/005
  Estimated     Afr/Ap 04 Jul  006/007
  Predicted    Afr/Ap 05 Jul-07 Jul  013/018-007/010-006/005

VI. Geomagnetic Activity Probabilities 05 Jul to 07 Jul
A. Middle Latitudes
Minor storm20%10%05%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm25%30%20%
Major-severe storm50%30%20%

<< Go to daily overview page

Latest news


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-flare2017/09/10X8.2
Last M-flare2020/05/29M1.1
Last geomagnetic storm2020/04/20Kp5 (G1)
Spotless days
Last 365 days287 days
2020158 days (70%)
Current stretch2 days

This day in history*

Solar flares
*since 1994

Social networks