1. Solar Demon Near real-time automatic
solardemon.oma.be
Solar Demon
Near real-time automatic
Dimming, Flare, and EUV wave Monitor
on SDO/AIA data
Emil Kraaikamp, Cis Verbeeck

2. Outline Solar Demon Objectives Solar Demon system Detection of
Flares
Dimmings
EUV waves
Future work
Demo
detections are shown at: solardemon.oma.be
EUV wave plots for February 15, :56 X2.3 Flare Event
01:50 UTC :56 UTC :02 UTC
1000
Distance (Mm)
time in minutes
solardemon.oma.be

3. Objectives Develop early warning system for earth-directed CMEs
Flares and dimmings detected typically within minutes!
Characterize flare, dimming and EUV wave events for research purposes
solardemon.oma.be

4. Second AFFECTS General Meeting, Brussels

5. Second AFFECTS General Meeting, Brussels

6. Solar Demon System I
Automatic detection of flares, dimmings and EUV waves
For Flares and Dimmings no human Intervention
Running in real-time on QLK (SDO/AIA)
Early warning system (15 minutes delay)
And on synoptic science data (SDO/AIA)
To create a catalog of events for science purposes (1 week delay)
Modular approach
Input module(s) seeking for images
9.4 nm for flares, 21.1 nm for dimmings and waves
Detection modules working on the retrieved input
Flare, Dimming, EUV wave
Database used for storing events and communication between modules
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7. Solar Demon System II One continuous run, no version of events
It waits for data, but can automatically jump over data-gaps
Test image for artifacts
Reduce false alarms
...
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8. Detecting Flares Producer tool for COMESEP alert system
SDO/AIA 9.4 nm images, detect bright changes
Can detect multiple flares occurring at the same time in separate locations
No macro-pixels, accurate flare location
GOES flux/flare class is estimated using the brightness of the flare
Also the original GOES 1-8Å flux is shown on the website (from the STAFF database)
Producer tool for COMESEP alert system
Provides flare location
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9. All flares detected by Solar Demon on synoptic science data.
May 2010 up to June 2014

10. A ‘butterfly’ diagram generated from all flare detections since May 2010 up to June 2014

11. Detecting Dimmings Event detection on running difference images
Detect intensity changes on a 6-minute timescale
Event characterization using base difference image from before the event was detected
Only one event is active at a time
If multiple dimming events occur close by in time or space, it is considered to be the same event
Dimming mask will include this new dimming!
Dimming masks become noisy over time
Difficult to track events accurately for a long amount of time
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12. All dimmings detected by Solar Demon on synoptic science data.
May 2010 up to June 2014

13. Detecting EUV waves Difficult to detect on their own Output
Dim and noisy features, even in difference images
Detection of waves on detected flares
Output
Polar transformed difference images
On flare center
Track EUV wave over 1000 Mm for at least 1 hour
Generate distance-time plots
User can determine EUV wave speed in several directions from these distance-time plots on the Solar Demon website
solardemon.oma.be
18/04/2014

14. Future Work
Provide fully automatic estimate of EUV wave speed in most prominent direction
Integrate user feedback
Reduce false alarms/misses
Compare output to other event catalogs
Adapt to different data sources
SWAP, EIT archive, Stereo EUVI
Associate Solar Demon events using other detection systems
(e.g. Dimmings and EUV wave parameters, and CME parameters)
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15. SolarDemonstration solardemon.oma.be
The research leading to these results has received funding from the European Commission's Seventh Framework Programme (FP7/ ) under the grant agreement n° (AFFECTS project,
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