Search Publications
Warning Time Analysis From SEP Simulations of a Two-Tier REleASE System Applied to Mars Exploration
Posner, A.; Strauss, R. D.
The sudden exposure to energetic protons from solar energetic particle (SEP) events beyond the Earth's magnetosphere and en route to and from Mars can, in extreme cases, lead to acute radiation sickness, an impairing, mission-endangering condition for astronauts. Timely warnings of their impending occurrence may significantly reduce radiation expo…
Application of a Modified Spheromak Model to Simulations of Coronal Mass Ejection in the Inner Heliosphere
Pogorelov, Nikolai V.; Arge, Charles N.; Singh, Talwinder +1 more
The magnetic fields of interplanetary coronal mass ejections (ICMEs), which originate close to the Sun in the form of a flux rope, determine their geoeffectiveness. Therefore, robust flux rope-based models of CMEs are required to perform magnetohydrodynamic (MHD) simulations aimed at space weather predictions. We propose a modified spheromak model…
Reconstruction of Extreme Geomagnetic Storms: Breaking the Data Paucity Curse
Merkin, V. G.; Sitnov, M. I.; Roelof, E. C. +5 more
Reconstruction of the magnetic field, electric current, and plasma pressure is provided using a new data mining (DM) method with weighted nearest neighbors (NN) for strong storms with the storm activity index Sym-H < -300 nT, the Bastille Day event (July 2000), and the 20 November 2003 superstorm. It is shown that the new method significantly r…
MHD Modeling of the Background Solar Wind in the Inner Heliosphere From 0.1 to 5.5 AU: Comparison With In Situ Observations
Wang, C.; Li, H.; Guo, X. C. +4 more
The accurate prediction of solar wind conditions in the interplanetary space is crucial in the context of both scientific research and technical applications. In this study, we simulate the solar wind throughout the heliosphere from 0.1 to 5.5 astronomical units (AU) with our improved heliospheric magnetohydrodynamics (MHD) model during the time p…
Improving Predictions of High-Latitude Coronal Mass Ejections Throughout the Heliosphere
Rodriguez, L.; Poedts, S.; Scolini, C. +2 more
Predictions of the impact of coronal mass ejections (CMEs) in the heliosphere mostly rely on cone CME models, whose performances are optimized for locations in the ecliptic plane and at 1 AU (e.g., at Earth). Progresses in the exploration of the inner heliosphere, however, advocate the need to assess their performances at both higher latitudes and…
Space Weather Monitor at the L5 Point: A Case Study of a CME Observed with STEREO B
Mierla, M.; Zhukov, A. N.; Rodriguez, L. +2 more
An important location for future space weather monitoring is the Lagrange point 5 (L5) of the Sun-Earth system. We test the performance of L5 for space weather monitoring using STEREO B observations of an Earth-directed coronal mass ejection (CME), seen as a partial halo by SOHO at L1. STEREO B (located close to L5) continuously tracked the CME. B…