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 26 November 2011
⇐20111125 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20111127⇒

NOAA
11 Active Regions
11352
11353
11354
11355
11356
11357
11358
11359
11360
11361
11350
SMART
No Data
CHARM
No Data
Welcome to the Flare Prediction System. This page gives the active regions on the Sun today together with each regions probability for producing C-, M-, or X-class events. The flare probabilities were calculated using NOAA Space Weather Prediction Center data from nearly eight years of data starting November 1988 and ending June 1996. The percentage probabilities are based on the number of flares produced by regions classified using the McIntosh classification scheme (McIntosh, P., 1990, Solar Physics, 125, 251) during cycle 22. For example, between November 1988 and June 1996 there were 302 regions classified Eai. As this class produced 62 M-class events, the mean M-class flare rate is ~62/302 or ~0.21 flares per day. Assuming the number of flares per unit time is governed by Poisson statistics, we can estimate a flaring probability for the following 24-hours using P( one or more flares ) = 1 - exp( -mean ), i.e., P = 1 - exp( -0.21 ) ~ 0.19, or 19% for an Eai class region to produce one or more M-class flares in the next 24-hours. See Wheatland, M. S., 2001, Solar Physics, 203, 87 and Moon et al., 2001, Journal of Geophysical Research-Space Physics, 106(A12) 29951 for further details.

Click here for a description of the various active region classifications from the Royal Observatory of Belgium.
Region Flare Probabilities (%)
Number McIntosh C-class M-class X-class
11352 Hsx 4(5) 1(1) 0(1)
11353 Hsx 4(10) 1(5) 0(1)
11354 Cso 12(1) 2(1) 0(1)
11355 Hsx 4(5) 1(1) 0(1)
11356 Esi 49(40) 5(10) 0(1)
11357 Dso 20(0) 4(0) 0(0)
11358 Eai 43(40) 19(10) 1(1)
11359 Dao 23(15) 6(5) 0(1)
11360 Cao 16(10) 2(5) 0(1)
11361 Axx 2(10) 0(5) 0(1)

NOTE: Values in parantheses/brackets give the NOAA/SWPC forecast probabilities for the occurrence of one or more C-, M-, or X-class flares. When viewed in real-time and before 22:00 UT, predictions are valid up to 22:00 UT on the current date. When viewed in real-time after 22:00 UT (or when viewing past dates), predictions are valid up to 22:00 UT on the following date. The most recent data can also be found at NOAA's 3-day Space Weather Predictions page.

Please contact Peter Gallagher if you have any comments or questions regarding this research.

IDL Access

Today's NOAA Active Regions
Group Number
Location
Hale
Class
McIntosh Class
Sunspot
Area
Number of Spots
Flares
History
11352 S24W66
(812",-404") 		α/α Hsx/Hsx 0030/0070 01/01 -
11353 N08W49
(728",119") 		α/α Hsx/Axx 0010/0010 01/01 C1.2(06:09)
11354 S15W50
(721",-267") 		β/β Cso/Dao 0025/0040 05/08 /C1.5(00:04)
11355 N14W34
(529",216") 		α/β Hsx/Cso 0080/0120 02/12 -
11356 N16W11
(179",245") 		β/βγ Esi/Ehi 0220/0310 23/16 -
11357 N18W91
(923",300") 		β/β Dso/Dai 0060/0060 06/07 /C1.1(17:14)
11358 N20E27
(-416",312") 		β/β Eai/Dsi 0170/0120 19/07 C1.0(17:12)
11359 N16W79
(917",263") 		β/β Dao/Cao 0050/0020 07/07 /C3.3(03:38)
C2.4(21:49)
11360 N17E03
(-48",261") 		β/- Cao/--- 0050/---- 06/-- C4.9(08:00)
11361 N19E45
(-651",300") 		α/- Axx/--- 0005/---- 01/-- -
11350 N25W91
(880",410") 		/ / / / -

Events not associated with currently named NOAA regions: None

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 26-Nov-2011 00:30 UT , the values to the right of the forward slashes representing yesterdays values or events. Regions with no data in above property fields have decayed and exhibit no spots. The region positions are valid on 26-Nov-2011 23:47 UT .