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 16 November 2001
⇐20011115 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20011117⇒

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
09690 S17W74
(876",-308") 		βγδ/βγδ Fki/Fki 0730/0780 29/50 -
09691 N09W57
(790",83") 		βγδ/αγδ Cso/Hsx 0070/0060 03/01 -
09694 N14W41
(608",141") 		αγδ/αγδ Hsx/Hsx 0050/0050 01/01 -
09695 N11W09
(146",64") 		αγδ/αγδ Hsx/Hsx 0050/0080 03/02 -
09696 S04W10
(165",-184") 		βγδ/βγδ Cro/Cro 0020/0010 08/09 -
09697 N13E06
(-97",96") 		βγδ/βγδ Dki/Dho 0330/0220 22/14 -
09698 S23E09
(-137",-480") 		βγδ/βγδ Dao/Dso 0090/0090 05/02 -
09700 S24W49
(658",-457") 		βγδ/αγδ Bxo/Axx 0010/0010 03/01 -
09702 N26W33
(467",324") 		αγδ/βγδ Axx/Bxo 0010/0010 02/02 -
09703 N23W15
(227",263") 		βγδ/αγδ Bxo/Axx 0020/0010 05/02 -
09704 S18E42
(-607",-378") 		βγδ/αγδ Cko/Hax 0270/0150 06/03 -
09705 N12E24
(-380",89") 		αγδ/βγδ Axx/Dro 0010/0030 01/02 -
09706 N15E38
(-568",153") 		αγδ/βγδ Axx/Cro 0000/0010 01/03 -
09707 N14W38
(571",137") 		αγδ/- Axx/--- 0010/---- 02/-- -
09708 N01W09
(149",-102") 		αγδ/- Axx/--- 0010/---- 03/-- -
09709 N20E25
(-379",221") 		βγδ/- Bxo/--- 0010/---- 03/-- -

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 16-Nov-2001 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 16-Nov-2001 23:30 .