4 July 2021
⇐20210703 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210705⇒

NOAA
4 Active Regions
12835
12836
12837
12838

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 E21N64
(-148",826") 		E32-W70
(102) 		3.5 0.9 1.1e21
2 E03S07
(-42",-171") 		E16-W18
(34) 		2.4 0.1 4.8e19
3 E19N29
(-268",415") 		E24-E08
(16) 		0.9 1.7 2.7e20
4 E23S68
(-135",-894") 		52
(2.6e04) 		-0.9 2.8 7.3e20
5 E36S27
(-492",-469") 		E42-E31
(11) 		0.2 -1.5 -6.9e19
6 W26N41
(315",581") 		W20-W32
(12) 		0.2 -0.7 -3.2e19
7 E71S13
(-869",-229") 		E79-E63
(16) 		0.1 -0.8 -6.1e19
8 E09S16
(-150",-305") 		E11-E06
(5) 		0.1 -0.9 -1.3e19
9 E02N12
(-30",136") 		E03-W00
(3) 		0.0 -1.1 -7.4e18

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 4-Jul-2021 23:30 UT .