Viewing archive of Thursday, 20 September 2001

Sunspot numberNew regionsBackground fluxMaximum fluxCM
276 523 2C1.8M1.5591

Solar flares

RegionStartMaximumEnd
-C3.4 02:2402:3202:36
9628C7.8 05:0305:1005:19
-C2.5 09:5810:3110:53
-C2.4 12:5413:0313:17
-C3.4 14:3514:4114:45
-C2.2 15:5015:5816:04
9631M1.5 18:1218:1718:21
9628C3.8 18:4818:5118:54

<< 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:2019/10/26Kp5 (G1)
Number of spotless days in 2019:236
Current stretch spotless days:9

This day in history*

Solar flares
12002M2.9
22013M2.4
32002M1.8
42003M1.6
52001M1.4
ApG
1200361G2
2199926G1
3200424G1
4201522G1
5201322G1
*since 1994

Social networks