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26 February 2023
20230225 Week Rotation Today Rotation Week 20230227

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

13229
13230
13234
13235
13236
13237

Eso/Eso
Cso/Cso
Ekc/Ekc
Dao/Dao
Dai/Dai
Axx/Bxo
MCEVOL
MCSTAT
NOAA
27 32 90
14 17 15
90 93 90
27 36 45
49 66 90
3 3 5
MCEVOL
MCSTAT
NOAA
2 11 55
1 3 1
47 82 25
4 7 15
10 16 30
0 1 1
MCEVOL
MCSTAT
NOAA
0 0 15
0 0 1
9 20 10
0 0 1
0 2 10
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
13229 N25W58
(745",465")
β/β Eso/Eso 0150/0150 12/12 - / M6.4(18:40)
C2.6(07:07)
C8.1(04:12)
13230 S22W34
(504",-267")
β/β Cso/Cso 0120/0120 11/11 -
13234 N25W07
(107",517")
βδ/βδ Ekc/Ekc 0580/0580 25/25 C5.5(11:51) / -
13235 N19W32
(487",411")
β/β Dao/Dao 0040/0040 06/06 -
13236 S28W21
(307",-352")
β/β Dai/Dai 0080/0080 14/14 -
13237 S12W03
(49",-81")
α/β Axx/Bxo 0010/0010 01/02 -
13233 N14W82
(931",248")
/ / / / -

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

Events not associated with currently named NOAA regions: C3.2(07:55) C2.1(03:00) C2.2(11:42) C2.3(15:02) M1.0(15:34)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 26-Feb-2023 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 26-Feb-2023 20:30 UT .