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15 April 2025
20250414 Week Rotation Today Rotation Week 20250416

NOAA Number McIntosh Class C-class M-class X-class

14055
14056
14058
14060
14061

Ekc/Ekc
Hsx/Hsx
Cao/Cao
Dai/Dao
Bxo/Cso
MCEVOL
MCSTAT
NOAA
90 93 0
3 5 10
17 22 0
66 66 50
9 6 5
MCEVOL
MCSTAT
NOAA
47 82 0
0 3 1
2 3 0
13 16 10
1 1 1
MCEVOL
MCSTAT
NOAA
9 20 0
0 0 1
0 0 0
1 2 1
0 0 1

Solar Monitor's flare prediction system's probabilities are calculated using NOAA Space Weather Prediction Center data. There are two main methods, MCSTAT and MCEVOL, that use sunspot-group McIntosh classifications and Poisson statistics to calculate flaring probabilities valid for a 24-hr period*. The flaring probabilities are calculated using historical data from the periods 1969-1976 & 1988-1996 (MCSTAT) and 1988-2008 (MCEVOL).

MCSTAT – Uses point-in-time McIntosh classifications to calculate Poisson flaring probabilities. Details about the method [1] and forecast verification testing [2] can be found in the following papers:

[1] Gallagher, P. T., Moon, Y.-J., Wang, H., Solar Physics, 209, 171, (2002)
[2] Bloomfield et al., 2012, The Astrophysical Journal Letters, 747, L41

MCEVOL – Uses the evolution of McIntosh classifications over a 24-hr period to calculate Poisson flaring probabilities. Details about the method and flaring rate statistics can be found in the following:

[1] McCloskey, A.E., Gallagher, P.T. & Bloomfield, D.S., Solar Physics, 291, 1711, (2016)

Further Reading:
Wheatland, M. S., 2001, Solar Physics, 203, 87
Moon et al., 2001, Journal of Geophysical Research-Space Physics, 106(A12) 29951


Notes:

'...' = McIntosh class or evolution was not observed in the period over which the Poisson flare rate statistics were determined.
* 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 queries 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
14055 N07W91
(948",114")
βγδ/βγδ Ekc/Ekc 0820/0820 14/14 M1.3(17:57)
C4.4(09:19)
C4.7(06:02)
C2.7(04:37)
C2.8(03:41)
C4.0(03:03)
C3.2(02:46)
C3.0(01:35)
C3.0(01:25)
/ C2.7(22:32)
C6.9(19:44)
14056 S09W50
(725",-90")
α/α Hsx/Hsx 0060/0060 01/01 -
14058 N16W91
(918",260")
β/β Cao/Cao 0040/0050 07/04 -
14060 N08W07
(115",224")
βγ/βγ Dai/Dao 0140/0140 12/06 -
14061 N18W43
(621",359")
β/β Bxo/Cso 0010/0030 02/05 -
14057 N09W54
(765",202")
/ / / / -
14059 N13W29
(453",293")
/ / / / -

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

Events not associated with currently named NOAA regions: C5.3(04:50) C5.2(07:41) C5.2(08:36) C3.2(13:42) C4.6(14:48) C4.6(15:19) C5.1(15:37) C3.2(20:08) M1.5(10:04)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 15-Apr-2025 00:30 UT . 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 15-Apr-2025 23:30 UT .