show styles

8 May 2023
20230507 Week Rotation Today Rotation Week 20230509

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

13293
13294
13296
13297
13299

Dai/Dai
Hsx/Hsx
Ekc/Ekc
Ekc/Ekc
Cao/Cao
MCEVOL
MCSTAT
NOAA
49 66 45
3 5 5
90 93 80
90 93 80
17 22 10
MCEVOL
MCSTAT
NOAA
10 16 10
0 3 0
47 82 30
47 82 30
2 3 1
MCEVOL
MCSTAT
NOAA
0 2 0
0 0 0
9 20 5
9 20 5
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
13293 N13W33
(506",260")
β/β Dai/Dai 0130/0130 10/10 -
13294 S08W10
(164",-77")
α/α Hsx/Hsx 0120/0120 02/02 -
13296 N16W20
(313",313")
β/β Ekc/Ekc 0280/0280 12/12 C8.0(02:16) / -
13297 N08W04
(65",188")
β/β Ekc/Ekc 0460/0460 18/18 C2.6(22:31)
C4.7(21:45)
C9.2(20:38)
M2.3(20:11)
C3.0(15:59)
C2.6(15:23)
C2.1(15:02)
C9.6(14:10)
C2.0(11:11)
C2.2(10:56)
C4.7(09:50)
C3.6(08:30) / -
13299 S06E15
(-245",-45")
β/β Cao/Cao 0060/0060 07/07 -
13289 N20W91
(892",323")
/ / / / -
13292 N14W91
(921",228")
/ / / / -
13295 N16W91
(913",260")
/ / / / -
13298 S16W22
(343",-212")
/ / / / -

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

Events not associated with currently named NOAA regions: C2.1(04:48) C3.1(05:05) C3.2(05:32) C3.7(06:40) C3.1(08:20) C1.8(12:28) C2.0(18:01)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 8-May-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 8-May-2023 23:30 UT .