Analysis of the ground level enhancement GLE 60 on 15 April 2001, and its space weather effects : comparison with dosimetric measurements
Larsen, N.; Mishev, A. L. (2023-08-21)
Larsen, N., & Mishev, A. L. (2023). Analysis of the ground level enhancement GLE 60 on 15 April 2001, and its space weather effects: Comparison with dosimetric measurements. Space Weather, 21, e2023SW003488. https://doi.org/10.1029/2023SW003488
© 2023. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe20230822101457
Tiivistelmä
Abstract
As a result of notable solar activity observed in April 2001, one of the strongest ground level enhancements (GLE) of solar cycle 23 occurred, namely GLE # 60 on 15 April 2001. In this paper, we derived the spectral and angular characteristics, and apparent source position of the solar protons during the GLE # 60, using a verified by direct measurements model and employing the calibrated neutron monitor yield function. Subsequently, employing the updated and verified by balloon measurements dosimetric model: Oulu CRAC:DOMO (Cosmic Ray Atmospheric Cascade: Dosimetric Model) we computed the dose rates throughout the event at several altitudes using the obtained spectra as an input. A global map of the ambient dose at an altitude of 35 kft is computed. A comparison with direct dosimetric measurements obtained by a Liulin device during an intercontinental flight is performed and good agreement is achieved.
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