Long duration X1.4 solar flare took place at new sunspot

Earth-orbiting satellites have detected a long-duration X1.4-class solar fare coming from a new sunspot on the sun's eastern limb. The blast, which peaked at 1100 UT, produced a significant CME, but the cloud is not Earth-directed. (SpaceWeather)

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A long duration X-Class Solar Flare reaching X1.4 took place around the new Sunspot rotating into view on the eastern limb. This event caused a radio blackout reaching the R3 level which effected areas located on the sunlit side of earth. A Type II and Type IV radio sweep frequency event resulted as well as a TenFlare. A bright CME is seen in the latest STEREO Ahead COR2 images, but will most likely not be earth directed because of the sunspots position. (SolarHam)

Solar activity has been high with one X-Class flare and multiple M-Class flares taking place around the new Sunspot rotating into view on the eastern limb. This region is not yet in prime position for earth directed CMEs. There will remain the chance for strong solar flares.

Top 10 Solar Flares of Cycle 24: (Sunspot number in brackets)
X6.9 - Aug 9, 2011 (1263)
X2.2 - Feb 15, 2011 (1158)
X2.1 - Sept 6, 2011 (1283)
X1.8 - Sept 7, 2011 (1283)
X1.5 - March 9 , 2011 (1166)
X1.4 - Sept 22, 2011 (1302)
M9.3 - Aug 4, 2011 (1261)
M9.3 - July 30, 2011 (1260)
M8.3 - Feb 6, 2010 (1045)
M6.6 - Feb 13, 2011 (1158)

6 of the 10 flares in the past 2 months.


Newly numbered NOAA Region 1302 (the bright area in the upper left of the NOAA/GOES-15 SXI image shown below) produced an X1 (NOAA Scale R3 – Strong) flare peaking at 7:01 AM Eastern (11:01 GMT) this morning. This flare did have an impressive coronal mass ejection (CME) associated with it.

However, given the location of Region 1302, this CME was not directed at Earth. Activity from this location can also increase the population of energetic protons near Earth (NOAA Solar Radiation Storm Scale), but these enhancements would be slow rising. This region is just now rotating into view, so the potential for continued activity is certainly there. Stay tuned for updates. (NOAA/SWPC)

Alerts / Bulletins
Latest Alert: Sep 22 1145 UTC SUMMARY: X-ray Event exceeded X1
Last Advisory Bulletin: None in last 7 days.


NOAA Scales Activity

Range 1 (minor) to 5 (extreme)
NOAA ScalePast 24 hrsCurrent
Geomagnetic StormsHighest Geomagnetic Storm level past 24 hrsCurrent Geomagnetic Storm level
Solar Radiation StormsHighest Radiation Storm level past 24 hrsCurrent Radiation Storm level
Radio BlackoutsHighest Radio Blackout level past 24 hrsCurrent Radio Blackout level

<SDO movie >   <STEREO movie >

Solar wind
speed: 392.5 km/sec
density: 0.8 protons/cm3

The Radio Sun
10.7 cm flux: 144 sfu

Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2 quiet

Interplanetary Mag. Field
Btotal5.0 nT
Bz3.2 nT south 


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