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27 December 2022
20221226 Week Rotation Today Rotation Week 20221228

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

13169
13171
13172
13173
13175
13176

Fkc/Fac
Cao/Cao
Bxo/Cro
Hsx/Hsx
Bxo/Cro
Dao/---
MCEVOL
MCSTAT
NOAA
94 92 95
17 22 20
8 6 5
3 5 5
8 6 5
... 36 25
MCEVOL
MCSTAT
NOAA
63 79 40
2 3 1
1 1 1
0 3 1
1 1 1
... 7 5
MCEVOL
MCSTAT
NOAA
0 27 10
0 0 1
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
13169 N21W57
(765",371")
βγ/βγ Fkc/Fac 0350/0200 19/30 -
13171 N23W38
(554",412")
β/β Cao/Cao 0100/0120 05/08 -
13172 S36W07
(96",-540")
β/β Bxo/Cro 0010/0040 04/04 -
13173 N25E10
(-154",451")
α/α Hsx/Hsx 0050/0050 01/02 -
13175 S21E29
(-443",-316")
β/β Bxo/Cro 0010/0040 04/02 -
13176 N19E49
(-697",344")
β/- Dao/--- 0070/---- 03/-- -
13168 S16W91
(937",-269")
/α /Hsx /0060 /01 -
13170 S19W56
(766",-295")
/ / / / -
13174 N23W29
(436",416")
/ / / / -

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

Events not associated with currently named NOAA regions: C6.5(00:32) C7.5(02:39) C7.5(02:54) C6.2(03:15) C3.4(04:19) C3.1(04:42) C2.5(05:18) C4.6(07:06) C4.2(09:11) C3.3(12:45) C4.7(17:12) C4.7(17:27) C4.7(17:28) C3.0(19:34) C4.5(20:07) M2.1(00:46) M1.1(08:02) M1.2(16:15) C3.8(22:33) C4.3(23:13)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 27-Dec-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 27-Dec-2022 20:30 UT .