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Member Since 2006
Toshi Nishimura
Research Associate Professor, Boston University
AGU Research
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Red Line Diffuse‐Like Aurora Driven by Time Domain Structures Associated With Braking Magnetotail Flow Bursts
GEOPHYSICAL RESEARCH LETTERS
22 may 2024
Yangyang Shen, Vassilis Angelopoulos, Anton Artemy...
Magnetotail earthward‐propagating fast plasma flows provide important pathways for magnetosphere‐ionosphere coupling. This study reexam...
Signatures of Dipolarizing Flux Bundles in the Nightside Auroral Zone
JOURNAL OF GEOPHYSICAL RESEARCH: SPACE PHYSICS
04 april 2024
Mark J. Engebretson, Sean A. Gaffaney, Jesus A. Oc...
Dipolarizing flux bundles (DFBs) have been suggested to transport energy and momentum from regions of reconnection in the magnetotail to the high l...
Extreme Geomagnetic Disturbances (GMDs) Observed in Eastern Arctic Canada: Occurrence Characteristics and Solar Cycle Dependence
JOURNAL OF GEOPHYSICAL RESEARCH: SPACE PHYSICS
26 december 2023
Mark J. Engebretson, Lily Yang, Erik S. Steinmetz,...
Extreme (>20 nT/s) geomagnetic disturbances (GMDs, also denoted as MPEs—magnetic perturbation events)—impulsive nighttime distu...
Nightside High-Latitude Phase and Amplitude Scintillation during a Substorm using 1-second Scintillation Indices
OBSERVATIONAL AND MODELING STUDIES OF IONOSPHERIC IRREGULARITIES AND SCINTILLATION I ORAL
spa-aeronomy | 15 december 2023
Toshi Nishimura, Thomas Kelly, Periyadan T. Jayach...
We examined evolution of Global Positioning System (GPS) scintillation during a substorm in the nightside high latitude ionosphere, using 1-second pha...
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Unexpected STEVE Observations at high-latitude during low geomagnetic conditions
MIDDLE-LATITUDE AND SUBAURORAL AERONOMY II POSTER
spa-aeronomy | 15 december 2023
Bea Gallardo-Lacourt, Toshi Nishimura, Larry Kepko...
In recent years, the scientific community and the public have been fascinated by a remarkable optical phenomenon called STEVE (Strong Thermal Emission...
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Model-based Investigation of Electron Precipitation-driven Density Structures and their Effects on Auroral Scintillation
OBSERVATIONAL AND MODELING STUDIES OF IONOSPHERIC IRREGULARITIES AND SCINTILLATION III POSTER
spa-aeronomy | 15 december 2023
Pralay Raj Vaggu, Matthew D. Zettergren, Kshitija ...
Electron density irregularities in the ionosphere can give rise to scintillations, affecting radio wave phase and amplitude. While scintillations in t...
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Information Theory Analysis of the Drivers of Scintillation
OBSERVATIONAL AND MODELING STUDIES OF IONOSPHERIC IRREGULARITIES AND SCINTILLATION III POSTER
spa-aeronomy | 15 december 2023
Noah Koliadko, Christopher Inae, Jay Johnson, Simo...
Understanding the cause of atmospheric signal scintillation is important in improving the quality of satellite communications. A variety of informatio...
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Applying an S4 Scintillation Index to High Frequency Radar Pulses
OBSERVATIONAL AND MODELING STUDIES OF IONOSPHERIC IRREGULARITIES AND SCINTILLATION III POSTER
spa-aeronomy | 15 december 2023
Subodh Dahal, Gareth W. Perry, Toshi Nishimura, Le...
In this paper, we present a method for calculating the S4 amplitude scintillation index for high frequency (HF; 3-30 MHz) radar pulses. We focus on on...
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