Pole‐to‐pole ionospheric disturbances due to solar flares, during low solar activity
PR Fagundes, VG Pillat, A Tardelli… - Journal of Geophysical …, 2024 - Wiley Online Library
There are growing concerns about the effect of solar flares on the ionosphere, mainly due to
possible deterioration or damage to our communication and navigation satellite systems. On …
possible deterioration or damage to our communication and navigation satellite systems. On …
Different Sporadic‐E (Es) Layer Types Development During the August 2018 Geomagnetic Storm: Evidence of Auroral Type (Esa) Over the SAMA Region
J Moro, J Xu, CM Denardini… - Journal of …, 2022 - Wiley Online Library
Sporadic‐E (Es) layers are investigated over five Digisonde stations located inside (Santa
Maria and Cachoeira Paulista), boundary (São Luís), and outside (Millstone Hill and Port …
Maria and Cachoeira Paulista), boundary (São Luís), and outside (Millstone Hill and Port …
The embrace magnetometer network for South America: Network description and its qualification
The present work is the first of a two-part paper on the Embrace Magnetometer Network. In
this part, we present the new Embrace Magnetometer Network (Embrace MagNet) in South …
this part, we present the new Embrace Magnetometer Network (Embrace MagNet) in South …
Ionospheric disturbances in a large area of the terrestrial globe by two strong solar flares of September 6, 2017, the strongest space weather events in the last decade
PR Fagundes, M Pezzopane, JB Habarulema… - Advances in Space …, 2020 - Elsevier
Abstract On September 6, 2017, the solar active region AR 2673 emitted two solar flares: the
first at 08: 57 UT (X2. 2) and the second at 11: 53 UT (X9. 3); both were powerful enough to …
first at 08: 57 UT (X2. 2) and the second at 11: 53 UT (X9. 3); both were powerful enough to …
On the sources of the ionospheric variability in the South American Magnetic Anomaly during solar minimum
J Moro, J Xu, CM Denardini… - Journal of …, 2019 - Wiley Online Library
We investigate for the first time the variability of the F2 layer critical frequency (foF2), its peak
height (hmF2), the thickness parameter B0, and the E region critical frequency (foE) over …
height (hmF2), the thickness parameter B0, and the E region critical frequency (foE) over …
Blanketing Sporadic‐E Layer Occurrences Over Santa Maria, a Transition Station From Low to Middle Latitude in the South American Magnetic Anomaly (SAMA)
J Moro, J Xu, CM Denardini, G Stefani… - Journal of …, 2022 - Wiley Online Library
Digisonde data obtained from July 2019 to June 2020 are used to study the overall
occurrences of the blanketing types (Esf, Esl, Esh, Esc) of the sporadic layers (Esb) over …
occurrences of the blanketing types (Esf, Esl, Esh, Esc) of the sporadic layers (Esb) over …
Global ionospheric response to a G2 and a G3 geomagnetic storms of November 4 and 5 2023
E Agyei-Yeboah, PR Fagundes, A Tardelli… - Advances in Space …, 2025 - Elsevier
Two successive geomagnetic storms of G2 and G3 intensities were observed on November
4, 2023, and November 5, 2023. The results presented in this study investigated the impacts …
4, 2023, and November 5, 2023. The results presented in this study investigated the impacts …
Ionospheric storm due to solar Coronal mass ejection in September 2017 over the Brazilian and African longitudes
PR Fagundes, VY Tsali-Brown, VG Pillat… - Advances in Space …, 2023 - Elsevier
Coronal mass ejection (CME) occurs when there is an abrupt release of a large amount of
solar plasma, and this cloud of plasma released by the Sun has an intrinsic magnetic field. In …
solar plasma, and this cloud of plasma released by the Sun has an intrinsic magnetic field. In …
Development of an empirical model for estimating the Quiet Day Curve (QDC) over the Brazilian sector
SS Chen, CM Denardini, LCA Resende… - Radio …, 2020 - ieeexplore.ieee.org
The Embrace Magnetometer Network (Embrace MagNet) uses a series of magnetometers
over South America to monitor the Earth's space environment and to study space weather …
over South America to monitor the Earth's space environment and to study space weather …
Evaluation of the Solar Quiet Reference Field (SQRF) model for space weather applications in the South America Magnetic Anomaly
SS Chen, CM Denardini, LCA Resende… - Earth, Planets and …, 2021 - Springer
In the present work, we evaluate the accuracy of the Solar Quiet Reference Field (SQRF)
model for estimating and predicting the geomagnetic solar quiet (Sq) daily field variation in …
model for estimating and predicting the geomagnetic solar quiet (Sq) daily field variation in …