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21 March 2023
20230320 Week Rotation Today Rotation Week 20230322

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

13251
13256
13257
13258
13259
13260

Axx/Hsx
Eho/Eko
Dso/Hax
Axx/Axx
Cro/Bxo
Hsx/Hsx
MCEVOL
MCSTAT
NOAA
2 3 5
43 52 40
13 30 20
2 3 5
13 13 15
3 5 10
MCEVOL
MCSTAT
NOAA
0 1 1
11 14 5
0 7 5
0 1 1
1 2 1
0 3 1
MCEVOL
MCSTAT
NOAA
0 0 1
0 0 1
0 1 1
0 0 1
0 0 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
13251 S13W87
(937",-209")
α/α Axx/Hsx 0010/0030 01/01 -
13256 S20E27
(-412",-229")
β/β Eho/Eko 0250/0270 06/03 -
13257 S27E42
(-575",-357")
β/α Dso/Hax 0140/0120 02/02 -
13258 N19E06
(-95",423")
α/α Axx/Axx 0010/0010 02/02 -
13259 S21E34
(-504",-252")
β/β Cro/Bxo 0020/0020 03/04 -
13260 N24E46
(-634",464")
α/α Hsx/Hsx 0120/0060 01/01 -
13252 N13W89
(937",216")
/ / / / -
13255 S05W59
(824",-23")
/ / / / -

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

Events not associated with currently named NOAA regions: C1.1(02:58) C1.1(03:02) C1.3(03:58) C1.3(04:00) C1.3(04:33) C1.4(08:09) C1.8(08:58) C1.7(10:16) C1.9(11:35) C4.6(13:46) C1.1(17:04) C3.1(06:33) C5.2(09:24) C1.3(11:32) C1.8(12:11) C1.5(13:26) C4.4(14:07) C4.1(14:15) C2.8(17:24) M1.3(01:19)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 21-Mar-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 21-Mar-2023 20:30 UT .