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 28 July 2002
⇐20020727 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20020729⇒

Welcome to the Flare Prediction System. This page lists the active regions present on the Sun today, together with their probability of producing C-, M-, or X-class events. Flare probabilities are calculated using NOAA Space Weather Prediction Center data combined over 1969-1976 and 1988-1996 (details of which can be found in Bloomfield et al., 2012, The Astrophysical Journal Letters, 747, L41, along with full forecast verification testing). 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 cycles 21 and 22. For example, over both time periods there were 377 regions classified Eai. As this class produced 131 M-class events, the mean M-class flare rate is ~131/377 or ~0.347 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( -0.347 ) ~ 0.29, or 29% for an Eai class region to produce one or more M-class flares in the next 24-hours.

See Gallagher, P. T., Moon, Y.-J., Wang, H., Solar Physics, 209, 171, (2002),
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: Occurrence of '...' indicates that McIntosh class was not observed in the period over which the Poisson flare rate statistics were determined. 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, NOAA 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), NOAA 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.


Today's/Yesterday's NOAA Active Regions
NOAA Number
Latest
Position
Hale
Class
McIntosh Class
Sunspot Area
[millionths]
Number of Spots
Recent
Flares
10036 S08W91
(942",-129") 		β/βγδ Dao/Cko 0320/0500 06/17 -
10037 N13W87
(927",206") 		α/βγδ Hsx/Cao 0120/0170 01/04 -
10038 N17W42
(611",191") 		α/αγδ Hsx/Axx 0020/0020 02/06 -
10039 S15W06
(96",-361") 		βγδ/βγδ Fki/Fkc 0900/0940 62/72 -
10042 S21W43
(608",-421") 		αγδ/βγδ Hsx/Cao 0020/0030 03/03 -
10043 N12W14
(226",82") 		βγδ/βγδ Dao/Dao 0160/0160 17/20 -
10044 S22W11
(169",-465") 		βγδ/βγδ Fki/Eki 0590/0430 45/42 -
10045 N05W39
(599",-10") 		βγδ/βγδ Dai/Dai 0160/0170 16/20 -
10047 N09W88
(940",143") 		βγδ/βγδ Cao/Bxo 0030/0030 07/04 -
10048 N20E24
(-365",220") 		βγδ/βγδ Cso/Cao 0050/0030 09/05 -
10049 S05W58
(806",-146") 		βγδ/βγδ Dao/Cso 0030/0220 10/02 -
10050 S07E09
(-148",-233") 		βγδ/βγδ Dso/Bxo 0090/0010 13/04 -
10051 S17E52
(-719",-347") 		βγδ/βγδ Cao/Cao 0090/0090 02/02 -
10052 N09E03
(-49",29") 		βγδ/- Cro/--- 0030/---- 05/-- -
10053 S17E10
(-158",-390") 		αγδ/- Hrx/--- 0010/---- 01/-- -
10054 S21E56
(-738",-402") 		βγδ/- Cro/--- 0040/---- 02/-- -

Class (HH:MM) -Today
Class (HH:MM) -Yesterday

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 28-Jul-2002 00:30 . The greyed out and light-blue entries are values from the previous day. Slashed cells indicate that the active region has no spots. The latest positions of the active regions are given in both heliographic and heliocentric co-ordinates. The region positions are valid on 28-Jul-2002 23:30 .