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2 January 2023
20230101 Week Rotation Today Rotation Week 20230103

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

13173
13176
13177
13179
13180
13181

Hrx/Hrx
Eko/Eko
Dac/Dac
Dki/Dki
Dso/Dao
Hax/---
MCEVOL
MCSTAT
NOAA
4 6 5
72 61 60
85 47 40
66 73 55
21 30 50
... 8 10
MCEVOL
MCSTAT
NOAA
0 1 1
11 21 20
12 24 5
26 30 15
3 7 15
... 3 1
MCEVOL
MCSTAT
NOAA
0 0 1
4 2 5
0 2 1
3 4 1
0 1 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
13173 N24W68
(827",415")
α/α Hrx/Hrx 0010/0020 01/01 -
13176 N20W27
(417",379")
β/βγ Eko/Eko 0380/0430 10/12 C9.4(06:09)
/ C3.1(22:52)
C1.5(14:50)
C1.7(04:52)
C1.6(03:27)
C3.7(02:04)
C1.6(01:33)
13177 S18E05
(-81",-250")
β/β Dac/Dac 0220/0310 09/06 -
13179 N14W63
(844",259")
β/β Dki/Dki 0360/0350 08/07 -
13180 N19E31
(-476",362")
β/β Dso/Dao 0220/0210 05/06 -
13181 S19E59
(-792",-291")
α/- Hax/--- 0030/---- 01/-- -
13172 S35W89
(798",-557")
/ / / / -
13175 S20W51
(714",-301")
/ / / / -

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

Events not associated with currently named NOAA regions: C1.6(05:22) C2.8(09:44) C2.4(11:30) C3.1(11:41) C1.1(16:02) C1.7(06:56) C1.9(07:35) C1.3(08:53) C1.7(14:16) C1.6(16:34) C1.8(17:43) C1.1(19:31) C1.1(22:09)

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 2-Jan-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 2-Jan-2023 20:30 UT .