25 citations · 152 across the 39 of their papers we have counts for
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Prompt emission of relativistic protons up to GeV energies from M6.4-class solar flare on July 17, 2023
Carlos Navia, Marcel Oliveira, Andre Nepomuceno
We show evidence of particle acceleration at GEV energies associated directly with protons from the prompt emission of a long-duration M6-class solar flare on July 17, 2023, rather…
The 2015 Summer Solstice Storm: one of the major geomagnetic storms of solar cycle 24 observed at ground level
C. R. A. Augusto, C. E. Navia, M. N. de Oliveira +8
We report on the 22-23 June 2015 geomagnetic storm. There has been a shortage of intense geomagnetic storms during the current solar cycle 24 in relation to the previous cycle. Thi…
Relativistic proton levels from region AR 12673 (GLE \#72) and the heliospheric current sheet as a SunEarth magnetic connection
C. R. A. Augusto, C. E. Navia, M. N. de Oliveira +4
On 2017 September 10 Neutron Monitors (NMs) apparatus located at ground level and high latitudes detected an increase in the counting rate associated to solar energetic particles (…
Ground level observations of relativistic solar particles on Oct 29th, 2015: Is it a new GLE on the current solar cycle?
C. R. A. Augusto, C. E. Navia, M. N. de Oliveira +2
On Oct. 29th, 2015, the Earth crossed through a fold in the heliospheric current sheet. This is called a "solar sector boundary crossing". Under this circumstances, a large coronal…
Signals at ground level of relativistic solar particles associated to the "All Saints" filament eruption on 2014
C. R. A. Augusto, C. E. Navia, M. N. de Oliveira +3
Far away from any sunspot, a bright flare erupted on November 1st, 2014, with onset at 4:44 UT and a duration of around three hours, causing a C2.7-class flare. The blast was assoc…
Was the GLE on May 17, 2012 linked with the M5.1-class flare the first in the 24th solar cycle?
C. R. A. Augusto, V. Kopenkin, C. E. Navia +8
On May 17, 2012 an M5.1-class flare exploded from the sun. An O-type coronal mass ejection (CME) was also associated with this flare. There was an instant increase in proton flux w…