1 May 2021
⇐20210430 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210502⇒

NOAA
3 Active Regions
12818
12820
12821

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W03N08
(52",205") 		E46-W59
(105) 		19.5 0.0 1.6e19
2 W18S32
(250",-448") 		27
(2.3e04) 		1.2 5.4 1.2e21
3 E16N70
(-90",917") 		E47-W19
(66) 		0.4 1.0 2.4e20
4 E29S33
(-392",-471") 		E31-E27
(4) 		0.1 1.7 1.9e19
5 E13S13
(-202",-153") 		E14-E11
(3) 		0.1 -1.0 -7.8e18
6 E43S11
(-633",-132") 		E45-E39
(6) 		0.0 -0.7 -7.2e18
7 W31S09
(483",-99") 		W29-W32
(3) 		0.0 -1.2 -9.6e18
8 E33S26
(-467",-366") 		E35-E31
(4) 		0.0 -1.2 -1.1e19
9 E01N36
(-15",616") 		E03-W03
(6) 		0.0 1.2 1.1e19
10 E47S01
(-703",25") 		E50-E45
(5) 		0.0 -0.9 -8.9e18

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 1-May-2021 23:30 UT .