The Ground-level Enhancements of 1989 September 29 and October 22
| العنوان: | The Ground-level Enhancements of 1989 September 29 and October 22 |
|---|---|
| المؤلفون: | J. W. Bieber, J. E. Humble, J. L. Cramp, K. B. Fenton, M. B. M. Bendoricchio, P. Evenson, M. L. Duldig, A. G. Fenton |
| المصدر: | Publications of the Astronomical Society of Australia. 10:211-217 |
| بيانات النشر: | Cambridge University Press (CUP), 1993. |
| سنة النشر: | 1993 |
| مصطلحات موضوعية: | Physics, Neutron monitor, 010504 meteorology & atmospheric sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 010502 geochemistry & geophysics, Solar maximum, 01 natural sciences, Ground level, Earth's magnetic field, Space and Planetary Science, Particle, Anisotropy, Event (particle physics), 0105 earth and related environmental sciences |
| الوصف: | During the solar maximum of 1989–91 an unprecedented sequence of 13 cosmic ray ground-level enhancements (GLEs) was observed by the world-wide neutron monitor network. Of particular interest were two GLEs observed by the Australian network. The 1989 September 29 event was the largest GLE in the space era while the October 22 GLE included an highly anisotropic precursor peak.Analysis of both these GLEs, taking into account disturbed geomagnetic conditions, shows that the particle arrivals at the earth were unusual. The September 29 GLE had significant particle propagation in the reverse direction and as the particle flux decreased following the peak the spectrum also softened. In contrast, the 1989 October 22 precursor exhibited extreme anisotropy while the particles involved in the main GLE showed a complex temporal structure possibly indicating multiple particle injection at the solar acceleration region. |
| تدمد: | 1448-6083 1323-3580 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::29d65ae29ff950d7d70bef08a409241f https://doi.org/10.1017/s1323358000025698 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........29d65ae29ff950d7d70bef08a409241f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14486083 13233580 |
|---|