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 17 June 2001
⇐20010616 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20010618⇒

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
09491 N28W80
(828",425") 		α/αγ Hsx/Hsx 0110/0070 01/02 -
09492 N23W84
(872",357") 		α/βγ Axx/Cso 0020/0040 01/03 -
09493 N07W78
(925",90") 		α/βγ Hsx/Eso 0080/0080 01/03 -
09495 N06W87
(946",92") 		β/βγ Dao/Dao 0290/0140 09/12 -
09497 S10W63
(837",-218") 		β/αγ Bxo/Axx 0020/0020 02/01 -
09498 N24W36
(513",296") 		β/βγ Cso/Dao 0040/0070 04/09 -
09499 N20W72
(852",288") 		α/αγ Hsx/Hsx 0060/0060 01/01 -
09500 N10W10
(163",47") 		β/βγ Cao/Dao 0040/0080 07/07 -
09501 S13W12
(193",-328") 		β/βγ Cao/Dso 0090/0080 07/05 -
09502 S25E05
(-75",-509") 		β/βγ Dao/Dso 0110/0160 19/14 -
09503 N13E19
(-303",102") 		βγ/βγ Fkc/Eai 0420/0290 35/24 -
09504 N07E23
(-370",5") 		βγ/βγ Cko/Cko 0410/0290 07/05 -
09505 N21E32
(-472",244") 		βγ/βγ Dso/Dao 0100/0120 02/03 -
09506 N17E47
(-668",198") 		βγ/βγ Fki/Cao 0720/0180 17/06 -
09507 N12W03
(48",79") 		βγ/βγ Cso/Cso 0030/0040 02/05 -
09508 S20W74
(861",-354") 		αγ/αγ Axx/Axx 0010/0010 01/01 -

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 17-Jun-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 17-Jun-2001 23:30 .