Mauna Loa Solar Observatory (MLSO) acquires unique observations of the Sun’s atmosphere to support NCAR’s goal to address critical gaps in understanding the Sun-Earth system and to provide observations to reduce damage and disruption from space weather hazards.

MLSO CME Alert Service

Annotated composite image showing size of K-Cor FOV compared to that of the CCOR instrument

MLSO’s K-Cor telescope detects and measures CMEs at least one hour before NOAA's space-based coronagraphs. Coronal images are produced and analyzed every 15 seconds, and email alerts are issued about 3 minutes after the eruption has been detected. Interim images and measurements of speed and radial distance are issued every 5 minutes and a summary email is issued once the CME leaves the K-Cor field of view.

If you would like to receive these prompt CME alert emails, send a request to mlso_data_requests@ucar.edu. The basic service includes the initial alert and the summary email. The 5-minute interim reports generate many emails and are not recommended except for operational nowcasting use.

Latest Images

K-Cor

 
pB Intensity
 
 
NRGF Intensity
 

UCoMP

 
Density
 
 
Enhanced Intensity
 
 
Doppler Velocity
 
 
Line Width
 
 
Linear Polarization
 
 
Radial Azimuth
 
 
Azimuth
 

GONG H-alpha

The Mauna Loa Observatory GONG station is offline until power is completely restored, so the most recent GONG image from an open station is shown here.

Featured Events

  2026-04-01: Fast CME

  POS B-field map

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