Solar activity report

Below you'll find a daily report brought to you by the NOAA about the solar activity and auroral activity during the past day and the prediction for the coming days. This page is daily updated around midnight.

Report of Solar-Geophysical Activity 2017 Jul 22 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 203 Issued at 2200Z on 22 Jul 2017

IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z

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 (23 Jul, 24 Jul, 25 Jul).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic field has been at quiet to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 763 km/s at 21/2143Z. Total IMF reached 8 nT at 22/0813Z. The maximum southward component of Bz reached -7 nT at 22/0809Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 3619 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on day one (23 Jul), quiet to unsettled levels on day two (24 Jul) and quiet levels on day three (25 Jul).
III. Event Probabilities 23 Jul to 25 Jul
Class M 01%01%01%
Class X 01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       22 Jul 070
  Predicted    23 Jul-25 Jul 070/070/070
  90 Day Mean        22 Jul 076

V. Geomagnetic A Indices
  Observed Afr/Ap 21 Jul  013/016
  Estimated     Afr/Ap 22 Jul  014/018
  Predicted     Afr/Ap 23 Jul-25 Jul  010/012-009/008-006/005

VI. Geomagnetic Activity Probabilities 23 Jul to 25 Jul
A. Middle Latitudes
Active25%10%10%
Minor storm 10%01%01%
Major-severe storm 01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm 25%25%20%
Major-severe storm 40%15%15%
Current data suggest that it is not possible to see aurora now at middle latitudes
The solar wind speed is currently moderately high (589.6 km/sec.)

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 25% 40%
Middle latitude 10% 1%
Predicted Kp max 4
Solar activity
M-class solar flare 1%
X-class solar flare 1%
Moon phase
Waning Crescent

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!

31%

Get instant alerts!

Space weather facts

Last X-flare:2015/05/05X2.7
Last M-flare:2017/07/14M2.4
Last geomagnetic storm:2017/07/17Kp6 (G2)
Number of spotless days in 2017:48
Current stretch spotless days:5

This day in history*

Solar flares
12004M9.1
22000M3.7
32004M1.6
42004M1.2
52000M1.0
ApG
1200431G3
2199925G1
3200924G2
4200216
5200512
*since 1994