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 14 August 2002
⇐20020813 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20020815⇒

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
10058 S07W91
(945",-113") 		βγ/βγ Dao/Dao 0060/0120 05/07 -
10061 N09W69
(879",105") 		βγ/βγ Cao/Cao 0080/0120 06/12 -
10063 N18W28
(426",191") 		βγ/βγ Eao/Dao 0180/0130 09/06 -
10065 S07W40
(609",-207") 		αγδ/- Axx/--- 0000/---- 01/-- -
10066 N14E02
(-32",112") 		βγ/βγ Dao/Dro 0070/0030 19/12 -
10067 N11E19
(-305",69") 		βγ/βγ Dso/Dso 0110/0090 12/09 -
10068 S07E20
(-324",-228") 		βγ/βγ Eso/Eao 0110/0100 07/08 -
10069 S07E36
(-557",-212") 		βγδ/βγ Ekc/Eki 1210/1170 19/11 -
10071 N10E28
(-442",59") 		αγδ/αγ Hax/Hsx 0020/0030 01/01 -
10072 S18W62
(801",-346") 		βγδ/βγ Dao/Dso 0160/0040 09/08 -
10075 S10E03
(-49",-283") 		βγδ/βγ Dro/Bxo 0040/0010 05/05 -
10076 N12E50
(-715",121") 		αγδ/αγ Hsx/Hsx 0060/0060 01/01 -
10077 S18E34
(-508",-388") 		αγδ/αγδ Hsx/Hsx 0010/0010 01/01 -
10078 S13W26
(408",-318") 		βγδ/- Dso/--- 0030/---- 09/-- -
10079 S20E41
(-588",-409") 		αγδ/- Hax/--- 0020/---- 01/-- -
10080 N16E55
(-751",194") 		βγδ/- Eao/--- 0120/---- 04/-- -

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 14-Aug-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 14-Aug-2002 23:30 .