15 Result(s)
within
Emilia K. J. Kilpua
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Article
Open AccessExploring the Circular Polarisation of Low–Frequency Solar Radio Bursts with LOFAR
The Sun is an active star that often produces numerous bursts of electromagnetic radiation at radio wavelengths. Low frequency radio bursts have recently been brought back to light with the advancement of nove...
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Radiation Belts and Their Environment
The Van Allen radiation belts of high-energy electrons and ions, mostly protons, are embedded in the Earth’s inner magnetosphere where the geomagnetic field is close to that of a magnetic dipole. Understanding...
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From Charged Particles to Plasma Physics
In this chapter we move from single particle motion to the statistical description of a large number of charged particles, the plasma. This discussion provides the basis for the rich flora of plasma waves that...
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Drivers and Properties of Waves in the Inner Magnetosphere
How different wave modes are driven, is a central issue in space plasma physics. A practical problem is that often only indirect evidence of the driver can be identified in observations. The plasma environment...
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Dynamics of the Electron Belts
In this chapter we discuss the overall structure and dynamics of the electron belts and some of their peculiar features. We also consider the large-scale solar wind structures that drive geomagnetic storms and...
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Charged Particles in Near-Earth Space
In this chapter we discuss the concepts that govern the motion of charged particles in the geomagnetic field and the principles how they stay trapped in the radiation belts. The basic particle orbit theory can...
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Plasma Waves in the Inner Magnetosphere
Understanding the role of plasma waves, extending from magnetohydrodynamic (MHD) waves at ultra-low-frequency (ULF) oscillations in the millihertz range to very-low-frequency (VLF) whistler-mode emissions at f...
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Particle Source and Loss Processes
The main sources of charged particles in the Earth’s inner magnetosphere are the Sun and the Earth’s ionosphere. Furthermore, the Galactic cosmic radiation is an important source of protons in the inner radiat...
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Article
Correction to: Understanding the Origins of Problem Geomagnetic Storms Associated with “Stealth” Coronal Mass Ejections
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Open AccessUnderstanding the Origins of Problem Geomagnetic Storms Associated with “Stealth” Coronal Mass Ejections
Geomagnetic storms are an important aspect of space weather and can result in significant impacts on space- and ground-based assets. The majority of strong storms are associated with the passage of interplanet...
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Open AccessBepiColombo Science Investigations During Cruise and Flybys at the Earth, Venus and Mercury
The dual spacecraft mission BepiColombo is the first joint mission between the European Space Agency (ESA) and the Japanese Aerospace Exploration Agency (JAXA) to explore the planet Mercury. BepiColombo was la...
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Article
Open AccessOn the Radial and Longitudinal Variation of a Magnetic Cloud: ACE, Wind, ARTEMIS and Juno Observations
We present observations of the same magnetic cloud made near Earth by the Advance Composition Explorer (ACE), Wind, and the Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon’s Interaction ...
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Article
Multiple regions of shock-accelerated particles during a solar coronal mass ejection
The Sun is an active star that can launch large eruptions of magnetized plasma into the heliosphere, known as coronal mass ejections (CMEs). These can drive shocks that accelerate particles to high energies, o...
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Open AccessThe Physical Processes of CME/ICME Evolution
As observed in Thomson-scattered white light, coronal mass ejections (CMEs) are manifest as large-scale expulsions of plasma magnetically driven from the corona in the most energetic eruptions from the Sun. It...
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Observations of an extreme storm in interplanetary space caused by successive coronal mass ejections
Space weather refers to dynamic conditions on the Sun and in the space environment of the Earth, which are often driven by solar eruptions and their subsequent interplanetary disturbances. It has been unclear ...
