Viewing archive of Thursday, 4 April 2019

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 2019 Apr 04 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 94 Issued at 2200Z on 04 Apr 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 Apr, 06 Apr, 07 Apr).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 527 km/s at 04/1657Z. Total IMF reached 10 nT at 04/1321Z. The maximum southward component of Bz reached -7 nT at 04/0906Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 479 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on days one and three (05 Apr, 07 Apr) and quiet to unsettled levels on day two (06 Apr).
III. Event Probabilities 05 Apr to 07 Apr
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       04 Apr 070
  Predicted   05 Apr-07 Apr 070/070/070
  90 Day Mean        04 Apr 071

V. Geomagnetic A Indices
  Observed Afr/Ap 03 Apr  012/012
  Estimated     Afr/Ap 04 Apr  008/011
  Predicted    Afr/Ap 05 Apr-07 Apr  011/012-007/010-010/012

VI. Geomagnetic Activity Probabilities 05 Apr to 07 Apr
A. Middle Latitudes
Active25%25%30%
Minor storm10%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Active20%20%15%
Minor storm30%30%30%
Major-severe storm30%30%30%

All times in UTC

<< Go to daily overview page

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!

98%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/06/10X1.55
Last M-flare2024/07/11M1.21
Last geomagnetic storm2024/06/28Kp8- (G4)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
June 2024164.2 -7.5
July 2024150.2 -14
Last 30 days152.1 +0.5

This day in history*

Solar flares
12004M9.71
22004M8.9
32004M7.77
42005M7.27
52005M4.59
DstG
11991-183G4
21982-178G5
31984-88G3
41961-77G4
52015-68G2
*since 1994

Social networks