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 13 March 2001
⇐20010312 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20010314⇒

NOAA
11 Active Regions
09368
09370
09372
09373
09374
09375
09376
09377
09378
09379
09380
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
No Prediction Found

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
09368 N24W91
(862",379") 		β/β Cao/Cao 0080/0210 02/07 -
09370 N10W79
(913",185") 		β/β Eao/Dao 0130/0150 13/20 -
09372 S35W91
(773",-539") 		β/β Cso/Dao 0040/0110 04/07 -
09373 S08E20
(-321",-20") 		β/β Eai/Dai 0320/0230 32/19 /C2.0(00:02)
C1.1(02:20)
09374 S18E14
(-218",-181") 		α/α Axx/Axx 0000/0000 01/01 -
09375 S16W85
(905",-248") 		α/β Hsx/Bxo 0020/0010 01/03 -
09376 S15E43
(-624",-159") 		β/α Cro/Hrx 0040/0030 04/01 /C3.1(02:32)
C4.7(16:26)
C3.2(18:36)
09377 S18W27
(409",-190") 		α/α Axx/Axx 0000/0000 01/01 -
09378 N24W45
(611",458") 		β/- Bxo/- 0020/- 04/- -
09379 N31E26
(-356",575") 		α/- Hsx/- 0020/- 01/- -
09380 S09E52
(-737",-74") 		α/- Hsx/- 0010/- 01/- -

Events not associated with currently named NOAA regions: C1.5(08:21) C1.6(09:13) /C2.1(05:16)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 13-Mar-2001 00:30 , 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 13-Mar-2001 23:30.