M5.1 flare 'Double Whammy', at Active Regions 13559 and 13561 - January 23, 2024
Solar Dynamics Observatory (SDO) operates in a geosynchronous orbit around Earth to obtain a continuous view of the Sun. The particular instrument in this visualization records imagery in the ultraviolet portion of the spectrum at wavelengths normally absorbed by Earth's atmosphere - so we need to observe them from space.
Almost simultaneous flares at Active Region 13559 (upper left of disk) and Active Region 13561 (lower right of disk) fire off, with a combined X-ray flux equivalent of an M5.1 solar flare. For details of this event, see the Space Weather database entry for both events.
For more information on the classification of solar flares, see Solar Flares: What Does It Take to Be X-Class? or X-Class: A Guide to Solar Flares. The point-spread function correction (PSF) has been applied to all this imagery.
Two small flares, within minutes of each other (upper left and lower right), erupt in this view from the SDO/AIA 131 angstrom filter.
Two small flares, within minutes of each other (upper left and lower right), erupt in this view from the SDO/AIA 171 angstrom filter.
Two small flares, within minutes of each other (upper left and lower right), erupt in this view from the SDO/AIA 304 angstrom filter.
What is the PSF (Point Spread-Function)?Many telescopes, especially reflecting telescopes such as the ones used on SDO (Wikipedia), have internal structures that support various optical components. These components can result in incoming light being scattered to other parts of the image. This can appear in the image as a faint haze, brightening dark areas and dimming bright areas. The point-spread function (Wikipedia) is a measure of how light that would normally be received by a single camera pixel, gets scattered onto other pixels. This is often seen as the "spikes" seen in images of bright stars. For SDO, it manifests as a double-X shape centered over a bright flare (see Sun Emits Third Solar Flare in Two Days). The effect of this scattered light can be computed, and removed, by a process called deconvolution (Wikipedia). This is often a very compute-intensive process which can be sped up by using a computers graphics-processing unit (GPU) for the computation.
Time slates for the multiple movies above, for custom compositing. Make sure to match the event and frame tag for the SDO frames you are using.
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NASA's Scientific Visualization Studio
MissionsThis visualization is related to the following missions:
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Datasets used in this visualization
SDO AIA 304 (304 Filter)ID: 677Collected with AIA JOINT SCIENCE OPERATIONS CENTER 2024-01-23T02:00:00 TAI to 2024-01-23T05:00:00 TAI
SDO AIA 171 (171 Filter)ID: 680Collected with AIA JOINT SCIENCE OPERATIONS CENTER 2024-01-23T02:00:00 TAI to 2024-01-23T05:00:00 TAI
SDO AIA 131 (131 Filter)ID: 730Collected with AIA JOINT SCIENCE OPERATIONS CENTER 2024-01-23T02:00:00 TAI to 2024-01-23T05:00:00 TAI
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