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25 May 2022
20220524 Week Rotation Today Rotation Week 20220526

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

13010
13011
13014
13017
13020
13021
13022

Bxo/Bxo
Cro/Cro
Dkc/Ekc
Axx/Bxo
Eso/Dai
Axx/Bxo
Hsx/Hsx
Bxo/Dro
Bxo/---
MCEVOL
MCSTAT
NOAA
8 6 0
7 13 0
80 80 65
0 32 35
3 5 5
6 6 5
... 6 5
MCEVOL
MCSTAT
NOAA
1 1 0
1 2 0
30 49 25
0 11 10
0 3 1
0 1 1
... 1 1
MCEVOL
MCSTAT
NOAA
0 0 0
0 0 0
6 9 5
0 0 1
0 0 1
0 0 1
... 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
13010 S17W91
(905",-277")
β/β Bxo/Bxo 0000/0010 03/03 -
13011 N18W91
(900",292")
β/β Cro/Cro 0010/0020 03/03 -
13014 N22W76
(852",360")
βδ/βδ Dkc/Ekc 0720/0800 16/18 -
13016 S18W47
(660",-278")
α/β Axx/Bxo 0010/0010 01/04 -
13017 N13W56
(766",226")
β/βγ Eso/Dai 0120/0130 09/13 -
13019 N14W09
(144",252")
α/β Axx/Bxo 0010/0010 04/04 C2.0(11:07)
C1.3(02:08) / -
13020 S21E17
(-259",-319")
α/α Hsx/Hsx 0030/0040 01/01 -
13021 N13E26
(-405",234")
β/β Bxo/Dro 0010/0030 05/06 -
13022 S08E43
(-641",-115")
β/- Bxo/--- 0010/---- 05/-- -
13015 N11W81
(918",184")
/ / / / -
13018 S11W58
(790",-168")
/ / / / -

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

Events not associated with currently named NOAA regions: C1.2(04:11) C1.5(04:52) C1.5(05:11) C2.1(16:22) M1.3(18:09) C1.6(01:54) C1.8(02:45) C1.9(04:41) C3.1(06:03) C3.2(06:22) C4.2(09:00) C4.5(09:15) C3.6(11:50) C1.4(13:26) C1.4(13:35) C5.1(22:03)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 25-May-2022 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 25-May-2022 23:30 UT .