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

Pajala Fireball

Juha Vierinen1,5, Torsten Aslaksen2, Jorge Chau3, Maria Gritsevich7, Björn Gustavsson1, Daniel Kastinen4, Johan Kero4, Alexandre Kozlovsky5, Derek McKay6, Steinar Midtskogen2, Thomas Ulich5, and Ketil Vegum2
Juha Vierinen et al.
  • 1University of Tromsø,
  • 2Norwegian Meteor Network
  • 3IAP Kühlungsborn
  • 4Swedish Institute of Space Physics
  • 5Sodankylä Geophysical Observatory
  • 6University of Turku
  • 7University of Helsinki

Meteoroids entering the Earth's atmosphere are associated with a number of phenomena including ablation, ambipolar diffusion, plasma transport, chemical reactions, shock waves, and plasma turbulence. A bright daylight fireball observed on 2020-12-04 13:30 UTC with two meteor cameras located in Skibotn and Sørreisa allowed the precise entry trajectory of the fireball to be determined. The path of the entering object is approximately between Angeli Finland and Pajala Sweden. Based on the brightness and entry trajectory, it is possible to estimate the approximate mass of the object, and associate it with a meteor shower (Northern Taurids). The effects of the fireball on the atmosphere were detected with a number of radar and radio instruments within the region, including ionosondes, meteor radars, an all-sky VHF imaging system, and an infrasound sensor. These observations allow a detailed study of the atmospheric interaction of a large meteoric body with the Earth's atmosphere to be made. In this talk, we will describe the observations of this fireball and discuss preliminary findings.

How to cite: Vierinen, J., Aslaksen, T., Chau, J., Gritsevich, M., Gustavsson, B., Kastinen, D., Kero, J., Kozlovsky, A., McKay, D., Midtskogen, S., Ulich, T., and Vegum, K.: Pajala Fireball, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-14715,, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.