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3 May 2024
20240502 Week Rotation Today Rotation Week 20240504

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

13654
13655
13661
13662
13663
13664
13665

Eai/Fkc
Hrx/Hsx
Cso/Hsx
Dao/Dao
Dac/Dso
Dai/Dao
Axx/---
MCEVOL
MCSTAT
NOAA
63 71 0
5 6 0
10 17 15
27 36 35
78 47 95
66 66 75
... 3 10
MCEVOL
MCSTAT
NOAA
0 29 0
0 1 0
0 3 1
4 7 5
0 24 65
13 16 25
... 1 1
MCEVOL
MCSTAT
NOAA
0 1 0
0 0 0
0 0 1
0 0 1
0 2 25
1 2 5
... 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
13654 S07W91
(943",-116")
β/βδ Eai/Fkc 0240/0400 06/18 -
13655 S26W91
(854",-417")
α/α Hrx/Hsx 0020/0030 01/01 -
13661 N22E13
(-199",414")
β/α Cso/Hsx 0050/0040 05/01 -
13662 N30W28
(387",524")
β/β Dao/Dao 0090/0070 11/10 -
13663 N26W04
(59",475")
βδ/βγ Dac/Dso 0230/0060 18/09 -
13664 S18E38
(-558",-246")
β/β Dai/Dao 0120/0040 13/05 -
13665 S05E57
(-796",-48")
α/- Axx/--- 0010/---- 01/-- -
13656 S12W91
(930",-198")
/ / / / -
13659 S13W78
(907",-200")
/ / / / -
13660 N11W19
(305",241")
/ / / / -

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

Events not associated with currently named NOAA regions: C2.7(01:51) C2.5(02:05) C7.5(03:17) C5.7(03:41) C3.5(04:24) C6.0(05:08) C6.7(05:21) C5.3(06:31) C2.0(14:43) C8.0(16:01) C8.0(16:05) C3.3(16:40) C2.0(17:10) C7.5(18:40) C4.0(20:12) C4.6(20:53) M4.4(08:05) M1.2(22:25) M1.1(23:11) X1.7(02:11)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 3-May-2024 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 3-May-2024 23:30 UT .