Coronal holes Help

On this page you will find all the information you need to spot any coronal holes on the earth-facing solar disk. Coronal holes are the source of fast solar wind streams which sometimes have the potential to produce minor to moderate geomagnetic storms. If our automated detection system recently detected an earth-facing coronal hole it will also be mentioned on this page.

SDO/AIA 193

SDO/AIA 193 Ångström wavelength

SDO/AIA 211

SDO/AIA 211 Ångström wavelength

Coronal hole detection map

Coronal hole detection map
Current data suggest that it is not possible to see aurora now at middle latitudes

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 25% 50%
Middle latitude 15% 1%
Predicted Kp max 4
Solar activity
M-class solar flare 1%
X-class solar flare 1%
Moon phase
Waxing Gibbous

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Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2018/02/23Kp5 (G1)
Number of spotless days in 2018:24
Current stretch spotless days:8

This day in history*

Solar flares
12014X4.9
22002M1.0
32000C8.6
42004C8.0
52014C5.7
ApG
1200020
2199618G1
3199414
420059
520158
*since 1994

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