Sun 

SDO EVE Late Phase Flares

Scientists have been seeing just the tip of the iceberg when monitoring flares with X-rays. With the complete extreme ultraviolet (EUV) coverage by the SDO EUV Variability Experiment (EVE), they have observed enhanced EUV radiation that appears not only during the X-ray flare, but also a second time delayed by many minutes after the X-ray flare peak. These delayed, second peaks are referred to as the EUV Late Phase contribution to flares.

The solar EUV radiation creates our Earth's ionosphere (plasma in our atmosphere), so solar flares disturb our ionosphere and consequently our communication and navigation technologies, such as Global Positioning System (GPS), that transmit through the ionosphere. For over 30 years, scientists have relied on the GOES X-ray monitor to tell them when to expect disturbances to our ionosphere. With these new SDO EVE results, they now recognize that additional ionospheric disturbances from these later EUV enhancements are also a concern.


Related Documentation

11_Hock_EBTEL.pdf
10a_Hock_EUV_Late_Phase_notext.pdf
11a_Hock_EBTEL_notext.pdf
10_Hock_EUV_Late_Phase.pdf
12a_Hock_EBTEL_Parameters_notext.pdf
12_Hock_EBTEL_Parameters.pdf

Credits

Walt Feimer (HTSI): Lead Animator
Chris Smith (HTSI): Animator
Scott Wiessinger (USRA): Video Editor
Scott Wiessinger (USRA): Producer
Tom Woods (University of Colorado): Scientist
Please give credit for this item to:
NASA/Goddard Space Flight Center. However, each element should be credited as indicated above.

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Mission:
SDO

Data Used:
SDO

This item is part of these series:
SDO - Animations
SDO - Footage
SDO - Visualizations

Goddard TV Tape:
G2011-097 -- EVE Late Phase Flares

Keywords:
SVS >> CME
SVS >> Coronal Mass Ejection
SVS >> HDTV
SVS >> Solar Flare
SVS >> Solar Ultraviolet
SVS >> Sun
SVS >> X-ray
GCMD >> Earth Science >> Sun-earth Interactions
SVS >> Space Weather
SVS >> SDO
SVS >> Solar Dynamics Observatory
SVS >> Heliophysics
SVS >> Corona
NASA Science >> Sun

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0