Region 11721

Number of
sunspots
Size Class Magn. Class Spot Location
2013/04/10 4 10 BXO S18E35
2013/04/11 10 80 DAO S19E20
2013/04/12 17 220 DAI S18E06
2013/04/13 18 190 DSI S18W07
2013/04/14 13 180 DSO S19W21
2013/04/15 12 140 ESI S18W33
2013/04/16 6 110 DAO S18W47
2013/04/17 5 120 CSO S17W61
2013/04/18 2 100 CSO S17W75
2013/04/19 1 60 HSX S18W86
2013/04/20 1 60 HSX S18W0*
C
2

The top 2 solar flares from sunspot region 11721

Start Maximum End
1C4.22013/04/1110:0910:1310:15
2C1.22013/04/1012:5412:5813:04

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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 2019:265
Current stretch spotless days:39

This day in history*

Solar flares
12001X2.8
22001M1.3
32002C7.1
42006C5.7
52015C5.6
ApG
1200340G2
2199833G1
3200521G1
4201519
5200716
*since 1994

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