EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

ASIM TGFs with accompanying elves

Ingrid Bjørge-Engeland1, Nikolai Østgaard1, Andrey Mezentsev1, Torsten Neubert2, Chris Alexander Skeie1, Martino Marisaldi1, Kjetil Ullaland1, Georgi Genov1, Olivier Chanrion2, and Victor Reglero3
Ingrid Bjørge-Engeland et al.
  • 1Birkeland Centre for Space Science, University of Bergen, Norway (
  • 2National Space Institute, Technical University of Denmark, Denmark
  • 3University of Valencia, Spain

The Atmospheric Space Interactions Monitor (ASIM) was launched in 2018, and has since then observed Terrestrial Gamma-ray Flashes (TGFs) and Transient Luminous Events (TLEs). ASIM consists of the Modular X- and Gamma-ray Sensor (MXGS) and the Modular Multispectral Imaging Array (MMIA). Using data from both MXGS and MMIA, we investigate observations of TGFs (detected by MXGS) with accompanying elves (detected by MMIA). We study the optical signatures of the elves detected by a photometer of MMIA operating in the 180-230 nm band. Lightning sferics associated with these events have been detected by WWLLN and GLD360. Several TGFs have associated lightning sferics outside the field of view of MMIA, but due to the expanding rings of the elves we can still observe optical signatures from accompanying elves. Using GLD360 data we also study properties of the lightning strokes.

How to cite: Bjørge-Engeland, I., Østgaard, N., Mezentsev, A., Neubert, T., Skeie, C. A., Marisaldi, M., Ullaland, K., Genov, G., Chanrion, O., and Reglero, V.: ASIM TGFs with accompanying elves, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-5878,, 2021.

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