Explanipedia

Cospatial Multiwavelength Observations of an Eruptive Prominence as the Bright Core of a Coronal Mass Ejection Open

Bin Zhuang, Tingyu Gou, Noé Lugaz, Manuela Temmer, Brian E. Wood , et al. · 2025

Coronal mass ejections (CMEs), as seen in white-light (WL) coronagraphs, often exhibit a classic three-part structure consisting of a bright front, a dark cavity, and a bright core. With the launch of Solar Orbiter, cospatial imaging of so…

Evolution of a Coronal Mass Ejection with an Eruptive Prominence from the Corona to Interplanetary Space Open

Bin Zhuang, Noé Lugaz, Brian E. Wood, Carlos R Braga, Manuela Temmer , et al. · 2025

Understanding the location and evolution of the cool dense prominence in relation to the large-scale structure of coronal mass ejections (CMEs) is critical to distinguish between different CME initiation mechanisms and to further deepen ou…

Coronal Mass Ejection–Induced Sub-Alfvénic Solar Wind: Key Insights from Parker Solar Probe Open

V. K. Jagarlamudi, Carlos R Braga, N. E. Raouafi, A. Vourlidas · 2025

Since its eighth encounter, starting on 2022 April 28, Parker Solar Probe has consistently sampled the elusive sub-Alfvénic solar wind during each perihelion pass, offering unprecedented insights into these critical regions of the solar at…

Ground-based Observations of Temporal Variation of the Cosmic-Ray Spectrum during Forbush Decreases Open

W. Mitthumsiri, D. Ruffolo, K. Munakata, M. Kozai, Y. Hayashi , et al. · 2025

Observations of temporary Forbush decreases (FDs) in the Galactic cosmic-ray (GCR) flux due to the passage of solar storms are useful for space-weather studies and alerts. Here, we introduce techniques that use global networks of ground-ba…

A Study on the Nested Rings CME Structure Observed by the WISPR Imager Onboard Parker Solar Probe Open

Shaheda Begum Shaik, M. G. Linton, S. E. Gibson, Phillip Hess, R. C. Colaninno , et al. · 2024

Despite the significance of coronal mass ejections (CMEs) in space weather, a comprehensive understanding of their interior morphology remains a scientific challenge, particularly with the advent of many state-of-the-art solar missions suc…

A Study on the Nested Rings CME Structure Observed by the WISPR Imager Onboard Parker Solar Probe Open

Shaheda Begum Shaik, M. G. Linton, S. E. Gibson, Philip E. Hess, R. C. Colaninno , et al. · 2024

Despite the significance of coronal mass ejections (CMEs) in space weather, a comprehensive understanding of their interior morphology remains a scientific challenge, particularly with the advent of many state-of-the-art solar missions suc…

Global Analysis of the Extended Decreases in Cosmic Rays Observed with Worldwide Networks of Neutron Monitors and Muon Detectors: Temporal Variation of the Rigidity Spectrum and Its Implication Open

K. Munakata, Y. Hayashi, M. Kozai, C. Kato, Nobumoto Miyashita , et al. · 2024

This paper presents the global analysis of two extended decreases in the galactic cosmic-ray intensity observed by worldwide networks of ground-based detectors in 2012. This analysis is capable of separately deriving the cosmic-ray density…

Do estilingue ao drone laser Open

Viviane Vidigal, Ana Carolina Reis Paes Leme, Nivea Maria Souto Maior, Carlos R Braga · 2024

Introdução: A metáfora “estilingue versus drone laser” representa uma figura de linguagem que compara a assimetria de armas que acontece nos atuais debates sobre a regulamentação do trabalho controlado por plataformas digitais.Objetivo: Co…

Global analysis of the extended cosmic-ray decreases observed with world-wide networks of neutron monitors and muon detectors; temporal variation of the rigidity spectrum and its implication Open

K. Munakata, Y. Hayashi, M. Kozai, C. Kato, Nobumoto Miyashita , et al. · 2024

This paper presents the global analysis of two extended decreases of the galactic cosmic ray intensity observed by world-wide networks of ground-based detectors in 2012. This analysis is capable of separately deriving the cosmic ray densit…

Challenges in Forecasting the Evolution of a Distorted CME Observed During the First Close Solar Orbiter Perihelion Open

Alessandro Liberatore, Carlos R Braga, Manuela Temmer, Greta M. Cappello, Daniele Telloni , et al. · 2024

Coronal Mass Ejections (CMEs), drivers of the most severe Space Weather disturbances, are often assumed to evolve self-similarly during their propagation. However, open magnetic field structures in the corona, leading to higher-speed strea…

Internal magnetic field structures observed by PSP/WISPR in a filament-related coronal mass ejection Open

Greta M. Cappello, Manuela Temmer, A. Vourlidas, Carlos R Braga, Paulett C. Liewer , et al. · 2024

Context. We investigated the coronal mass ejection (CME) related to an eruptive filament over the southwestern solar limb on December 8, 2022, at around 8 UT. We tracked localized density enhancements reflecting the magnetic structures usi…

A Coronal Mass Ejection Impacting Parker Solar Probe at 14 Solar Radii Open

Carlos R Braga, V. K. Jagarlamudi, A. Vourlidas, G. Stenborg, Teresa Nieves‐Chinchilla · 2024

The relationship between CME properties in the corona and their interplanetary counterparts is not well understood. Until recently, a wide spatial gap existed between the two regions, which prevented us from disentangling the spatial and t…

Multi-spacecraft Observations of the 2022 March 25 CME and EUV Wave: An Analysis of Their Propagation and Interrelation Open

Alessandro Liberatore, Paulett C. Liewer, A. Vourlidas, Carlos R Braga, M. Velli , et al. · 2023

This paper reports on a well-defined EUV wave associated with a coronal mass ejection (CME) observed on 2022 March 25. The CME was observed by Solar Orbiter (SolO) during its first close perihelion (0.32 au) and by several other spacecraft…

Near-Sun In Situ and Remote-sensing Observations of a Coronal Mass Ejection and its Effect on the Heliospheric Current Sheet Open

Orlando Romeo, Carlos R Braga, Samuel T. Badman, D. E. Larson, M. L. Stevens , et al. · 2023

During the thirteenth encounter of the Parker Solar Probe (PSP) mission, the spacecraft traveled through a topologically complex interplanetary coronal mass ejection (ICME) beginning on 2022 September 5. PSP traversed through the flank and…

Data mining of cosmic-ray anisotropy observed with the Global Muon Detector Network Open

M. Kozai, Y. Hayashi, C. Kato, K. Munakata, Y. Masuda , et al. · 2023

Ground-based muon detectors are sensitive to anisotropies of cosmic rays at approximately 50 GeV and have been operated with great stability for over 10 years. The anisotropy is controlled by the space environment in various time scales an…

Structure of the Plasma near the Heliospheric Current Sheet as Seen by WISPR/Parker Solar Probe from inside the Streamer Belt Open

Paulett C. Liewer, A. Vourlidas, G. Stenborg, R. A. Howard, Jiong Qiu , et al. · 2023

Parker Solar Probe (PSP) crossed the heliospheric current sheet (HCS) near the perihelion on encounters E8 and E11, enabling the Wide-field Imager for Solar Probe (WISPR) to image the streamer belt plasma in high resolution while flying th…

Parker Solar Probe Encounters the Leg of a Coronal Mass Ejection at 14 Solar Radii Open

D. J. McComas, T. Sharma, E. R. Christian, C. M. S. Cohen, M. I. Desai , et al. · 2023

We use Parker Solar Probe (PSP) observations to report the first direct measurements of the particle and field environments while crossing the leg of a coronal mass ejection (CME) very close to the Sun (∼14 Rs). An analysis that combines i…

Large-amplitude Bidirectional Anisotropy of Cosmic-Ray Intensity Observed with Worldwide Networks of Ground-based Neutron Monitors and Muon Detectors in 2021 November Open

K. Munakata, M. Kozai, C. Kato, Y. Hayashi, Ryuho Kataoka , et al. · 2022

We analyze the cosmic-ray variations during a significant Forbush decrease observed with worldwide networks of ground-based neutron monitors and muon detectors during 2021 November 3–5. Utilizing the difference between primary cosmic-ray r…

Coronal Mass Ejection Deformation at 0.1 au Observed by WISPR Open

Carlos R Braga, A. Vourlidas, Paulett C. Liewer, Phillip Hess, G. Stenborg , et al. · 2022

Although coronal mass ejections (CMEs) resembling flux ropes generally expand self-similarly, deformations along their fronts have been reported in observations and simulations. We present evidence of one CME becoming deformed after a peri…

Coronal mass ejection deformation at 0.1 au observed by WISPR Open

Carlos R Braga, A. Vourlidas, Paulett C. Liewer, Philip E. Hess, G. Stenborg , et al. · 2022

Although coronal mass ejections (CMEs) resembling flux ropes generally expand self-similarly, deformations along their fronts have been reported in observations and simulations. We present evidence of one CME becoming deformed after a peri…

Correction to: Wavelet Analysis of Forbush Decreases at High-Latitude Stations During Geomagnetic Disturbances Open

Roshan Kumar Mishra, Ashok Silwal, Rabin Baral, Binod Adhikari, Carlos R Braga , et al. · 2022

Internal Structure of the 2019 April 2 CME Open

Brian E. Wood, Carlos R Braga, A. Vourlidas · 2021

We present the first analysis of internal coronal mass ejection (CME) structure observed very close to the Sun by the Wide-field Imager for Solar PRobe (WISPR) instrument on board the Parker Solar Probe (PSP). The transient studied here is…

Singularity Detection on Forbush Decrease at High Latitude Stations During Geomagnetic Disturbances Open

Roshan Kumar Mishra, Ashok Silwal, Rabin Baral, Binod Adhikari, Carlos R Braga , et al. · 2021

We analyzed the behavior of Cosmic Ray (CR) intensity during geomagnetic events of different nature and strength, using ground-based CR measurements from the World Neutron Monitoring Stations Network. We took account of interplanetary trig…

A Peculiar ICME Event in August 2018 Observed With the Global Muon Detector Network Open

W. Kihara, K. Munakata, C. Kato, Ryuho Kataoka, Akira Kadokura , et al. · 2021

We demonstrate that global observations of high‐energy cosmic rays contribute to understanding unique characteristics of a large‐scale magnetic flux rope causing a magnetic storm in August 2018. Following a weak interplanetary shock on Aug…

Coronal mass ejections observed by heliospheric imagers at 0.2 and 1 au Open

Carlos R Braga, A. Vourlidas · 2020

Context. We study two coronal mass ejections (CMEs) observed between April 1 to 2, 2019 by both the inner Wide-Field Imager for Parker Solar Probe (WISPR-I) onboard the Parker Solar Probe (PSP) spacecraft (located between about 46 and 38 s…

Calculating the CME Time-of-Arrival and Speed-on-Arrival using observations from HI-1 using drag force and elliptical front model Open

Carlos R Braga · 2020

This are the IDL codes and their input files used on this study. Using this software and opening the .sav files require IDL (tested with 8.0 or higher) and SolarSoft (SECCHI, NRL, SOHO packages, among others).

Predicting the Time-of-Arrival of Coronal Mass Ejections at Earth Solely From Heliospheric Imaging Observations Open

Carlos R Braga, A. Vourlidas, G. Stenborg, A. Dal Lago, R. R. S. Mendonça , et al. · 2020

The Time-of-Arrival (ToA) of coronal mass ejections (CME) at Earth is a key parameter due to the space weather phenomena associated with the CME arrival, such as intense geomagnetic storms. Several approaches to estimate the ToA based on k…

a_v_CD_CME_ID27v_16h.ps Open

Carlos R Braga · 2020

CME 27 kinematics (acceleration, speed) using drag results from version 16h.

all_elongations_20110621064901_ 90.txt Open

Carlos R Braga · 2020

Elongations for multiple visual inspections as a function of time

all_elongations_20130411100901_ 87.txt Open

Carlos R Braga · 2020

Elongations for multiple visual inspections as a function of time

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