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18 February 2022
20220217 Week Rotation Today Rotation Week 20220219

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

12943
12946
12948
12949
12950
12951
12952

Bxo/Cro
Bxo/Cro
Cao/Dao
Bxo/Cro
Hrx/Hrx
Bxo/Cro
Hrx/---
MCEVOL
MCSTAT
NOAA
8 6 5
8 6 10
17 22 20
8 6 5
4 6 10
8 6 5
... 6 10
MCEVOL
MCSTAT
NOAA
1 1 1
1 1 1
3 3 1
1 1 1
0 1 1
1 1 1
... 1 1
MCEVOL
MCSTAT
NOAA
0 0 1
0 0 1
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
12943 S21W78
(886",-322")
β/β Bxo/Cro 0020/0020 05/08 -
12946 S10W27
(435",-64")
β/β Bxo/Cro 0010/0030 03/05 -
12948 S27E03
(-45",-333")
β/βγ Cao/Dao 0100/0080 13/08 -
12949 N24W44
(617",470")
β/β Bxo/Cro 0010/0020 06/05 -
12950 N21E21
(-325",449")
α/α Hrx/Hrx 0020/0020 01/01 -
12951 S24W27
(404",-297")
β/β Bxo/Cro 0010/0010 04/02 -
12952 S24E55
(-728",-330")
α/- Hrx/--- 0020/---- 01/-- -

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

Events not associated with currently named NOAA regions: C1.4(20:40)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 18-Feb-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 18-Feb-2022 20:30 UT .