| Issue |
EPL
Volume 143, Number 5, September 2023
|
|
|---|---|---|
| Article Number | 59002 | |
| Number of page(s) | 7 | |
| Section | Gravitation, cosmology and astrophysics | |
| DOI | https://doi.org/10.1209/0295-5075/acf340 | |
| Published online | 04 September 2023 | |
Thunderstorm ground enhancements observed on Aragats mountain in Armenia in the wintertime
1 A. Alikhanyan National Lab (Yerevan Physics Institute) - Yerevan 0036, Armenia
2 Institute of Applied Physics of RAS - 46 Ul'yanov Str., Nizhny Novgorod 603950, Russia
(a) E-mail: chili@aragats.am (corresponding author)
Received: 9 April 2023
Accepted: 23 August 2023
Thunderstorm ground enhancements (TGEs) occur in the spring-autumn seasons at Aragats due to warm air updrafts that cause hydrometeor charging. However, particle detectors recorded three TGEs within 10 hours on February 7, 2023, despite the temperature being −10 °C. Upon analyzing the energy spectra of TGE electrons and gamma rays, it was discovered that the atmospheric electric-field strength above Aragats, at heights 3300–5300 m, could be around 2.1 kV/cm even in winter. We provide details on the fluxes and energy spectra of TGE electrons and gamma rays, as well as discuss models of cloud electrification in winter.
© 2023 EPLA
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