Articles tagged with Radiation Belts
Researchers theorize that solar wind storms drove Voyager 2's observations of extreme radiation on Uranus. They suggest a co-rotating interaction region passing through the system could have fueled powerful high-frequency waves.
Scientists detected a 'wisp' precipitation with peak intensity inside the South Atlantic Anomaly, a region of weaker geomagnetic field and higher energetic particle flux. Ground-based VLF transmitter in Australia scatters electrons into this 'wisp', which is characterized by its peak intensity outside the anomaly.
The CORBES mission aims to conduct an ultra-fast survey of the Earth's radiation belt using a constellation of multi-Small/CubeSats. The mission will differentiate between temporal and spatial variations in the radiation belts, advancing our understanding of Earth's radiation belt dynamics.
Researchers at the University of Colorado Boulder have discovered a link between lightning storms on Earth and high-energy electrons in space. The team found that lightning strikes can knock these 'killer electrons' out of the inner radiation belt, which could pose a threat to satellites and astronauts.
Researchers at University of Alaska Fairbanks discovered a phenomenon impacting Earth's radiation belts, affecting the radiation belts with electromagnetic waves from lightning. The discovery provides insight into the behavior of electromagnetic waves in the magnetosphere and its implications for human operations in space.
A new study has challenged existing theories on the behavior of particles in the Van Allen belt, a hazardous region near Earth. The research has implications for predicting and analyzing particle movement, which is crucial for understanding space environments.
High-energy electrons pose significant radiation damage to satellites; a new study sets benchmark levels for extreme space weather events. Satellite operators must prepare against these risks as the global space economy relies on over 5,465 operational satellites.
Scientists have discovered the first-ever extrasolar radiation belt, orbiting the brown dwarf LSR J1835+3259. The discovery reveals that this magnetic structure is filled with extremely high-energy electrons and charged particles, sparking new questions about the universality of such phenomena.
Researchers have imaged a double-lobed structure resembling Jupiter's radiation belts around an ultracool dwarf, revealing the presence of high-energy electrons trapped in its magnetic field. This discovery provides a new method for assessing the shapes of magnetic fields on brown dwarfs and exoplanets.
A team of international researchers used aurora data to assess the impact of radiation-belt electrons on the ozone layer. They found a localized ozone hole in the mesosphere, about 400 km wide, directly below isolated proton auroras, with up to 10-60% of ozone destroyed.
The study reveals that the region within Io's orbit is dominated by oxygen and sulfur ions, with oxygen prevailing among the two. Further inward, within Amalthea's orbit, oxygen ion concentration increases unexpectedly.
A team of scientists successfully visualized the propagation path of electromagnetic waves from space to ground, revealing a 'straw-shaped' pathway. The study used data from multiple spacecraft and ground-based observatories to clarify the origin and spatial extent of these waves.
Tiny charged electrons and protons have been studied by University of Otago scientists in a Geophysical Research Letters publication. By analyzing data from GPS satellites, the researchers found that EMIC waves can cause changes in the number of particles in Earth's radiation belts, affecting satellite orbits and atmospheric chemistry.
Electrons in Earth's radiation belt can be accelerated to ultra-relativistic energies when plasma density is extremely low, enabling them to surf on plasma waves and take energy from them. This two-stage acceleration process may also occur in other astrophysical objects.
Scientists discovered that electrons in Van Allen Radiation Belts are accelerated to extreme high speeds locally, reaching ultra-relativistic energies. This process is extremely efficient and may help understand acceleration processes in the universe.
A new machine-learning computer model accurately predicts damaging radiation storms caused by the Van Allen belts two days prior to the storm. The PreMevE 2.0 model improves forecasts by incorporating upstream solar wind speeds and can be applied to predict more energetic electrons.
Researchers discovered a hotspot in Earth's radiation belt where killer electrons form, which can cause serious anomalies in satellites. The finding improves the accuracy of forecasting when these high-speed electrons will form, potentially impacting space weather science.
Structured diffuse auroras track Van Allen belts' shape and size changes, enveloping satellites in unexpected radiation. The discovery helps track the edges of the belts, crucial for mitigating effects on space exploration.
The twin Van Allen Probes are starting a new phase of their exploration, lowering their orbits to gather data on the dynamic radiation belts. The spacecraft will eventually re-enter Earth's atmosphere, providing insight into how oxygen can degrade satellite instruments.
A team of scientists has found a new way to explain the formation of Saturn's radiation belts, which challenges current theories on electron acceleration. They suggest that Z-mode waves are responsible for energizing electrons in the belt, rather than radial diffusion.
ELFIN aims to measure magnetic waves and 'lost' electrons, verifying the causal mechanism behind energetic electrons escaping the Van Allen Belts. The mission uses two CubeSats to observe electron precipitation across space and time.
A new UK-US study found that electron radiation levels within the Van Allen radiation belts can remain exceptionally high for 5 days or more after a solar wind event. This increases the risk of damage to satellites' electronic components, potentially leading to malfunctions and service outages.
The Van Allen Probes mission has identified local acceleration as the main cause of highly energized ions and electrons in the radiation belts, contrary to previous theories that suggested radial diffusion was the primary driver. This discovery is crucial for improving space weather forecasting models.
GTOSat will gather measurements from a highly elliptical Earth orbit and use its instruments to measure high-energy particles in the Van Allen belts, providing new data after the Van Allen Probes mission is over. The Dellingr-X spacecraft bus and its instruments are designed to withstand the hostile environment of the radiation belts.
Researchers have solved a six-decade-old mystery about the source of energetic particles in Earth's inner radiation belt using data from a CubeSat. The study found that cosmic rays born from supernova explosions create charged particles, including electrons, that become trapped by Earth's magnetic field.
A University of Colorado Boulder student-built satellite has solved a 60-year-old mystery regarding the source of energetic and potentially damaging particles in Earth's radiation belts. The study found that these particles are created by cosmic rays entering the atmosphere, producing charged particles trapped by Earth's magnetic field.
A recent study by the American Institute of Physics reveals that high-frequency quasi-electrostatic fluctuations in the Earth's radiation belts are driven by hot electrons. These fluctuations allow radiation belt electrons to remain inside the outer Van Allen band for a long time, influencing radiation exposure for orbiting satellites.
A new study examines the effects of high-altitude nuclear explosion tests on Earth's magnetic environment, revealing similarities with natural radiation belts and auroras. The research sheds light on the impact of space weather on satellites and astronauts.
New observations from NASA's Van Allen Probes mission show that relativistic electrons, the fastest and most energetic particles in the inner radiation belt, are not present as much of the time as previously assumed. This discovery has significant implications for spacecraft design and opens up new avenues for scientific study.
Researchers from UNH captured unique measurements of the Van Allen radiation belts during a rare solar wind event. The findings provide valuable information for protecting orbiting satellites and exploring conditions on other Earth-like planets.
Researchers discovered that ultra-relativistic electrons are scattered into the atmosphere by electromagnetic ion cyclotron waves, while relativistic particles remain intact. This finding resolves a long-standing debate on electron loss mechanisms in the Van Allen Radiation Belts.
The BARREL team launches miniature balloons to measure X-rays in Earth's atmosphere, helping protect satellites from radiation. Undergraduate students develop instruments to study ionosphere and low-frequency electromagnetic waves.
The Van Allen Probes detected a sudden pulse of high-energy electrons energized by an interplanetary shock, and five days later, an increased number of even higher energy electrons. Researchers can now better understand the unique energization processes following a geomagnetic storm.
Scientists have discovered a 'space tsunami' that creates the third Van Allen Belt, a region of intense radiation in space. This finding helps mitigate the effects of extreme space weather and has significant implications for satellite operations and human exploration.
The study finds that the shape of the radiation belts varies depending on electron energy levels, resulting in different structures during geomagnetic storms. The new data from the Van Allen Probes satellites provide a more detailed understanding of the dynamics, enabling scientists to create a more precise model.
Physicists at UCLA's LAPD successfully recreated whistler-mode chorus waves, previously only observed in space, to study the excitation process and its implications for satellite safety. The experiment reveals a complex interplay of plasma parameters and wave signatures that provide an unprecedented constraint on theoretical models.
A study by Dartmouth physicist Robyn Millan and NASA's Van Allen Probes has discovered new X-ray actions caused by solar flares, affecting Earth's atmosphere. The findings provide insight into the processes that can impact our lives directly.
A team of UCLA researchers has discovered the structure of mysterious plasma waves in near-Earth space, which were first detected in the 1960s. The findings reveal a zebra-striped pattern that could explain how these waves are excited.
A Dartmouth-led NASA study has found that plasma waves in the Earth's radiation belts are responsible for scattering charged particles into the atmosphere. The researchers used a combination of satellite and balloon data to test the theory and obtained quantitative results, providing new insights into space weather's impact on our planet.
A team led by University of Colorado Boulder discovered an invisible shield in the Van Allen radiation belts that blocks ultrafast electrons, threatening astronauts and space systems. The barrier is thought to be maintained by Earth's magnetic field or plasmaspheric hiss.
Researchers found that Earth's 'plasmaspheric hiss' protects against a harmful radiation belt, deflecting high-energy electrons with an impenetrable barrier of about 11,000 kilometers. This natural shield could extend lifetimes for satellites and space stations orbiting near the Earth's surface.
The Van Allen radiation belts contain a nearly impenetrable barrier that prevents the fastest, most energetic electrons from reaching Earth. The discovery was made using NASA's Van Allen Probes, which study the region and provide accurate measurements of high-energy electrons for the first time.
The Van Allen Probes have found a two-fold process that accelerates particles in the radiation belts, with an initial boost followed by electromagnetic waves called Whistlers. This mechanism helps explain how electrons reach intense speeds, damaging spacecraft and affecting astronauts.
The Van Allen Probes have discovered persistent zebra stripes in the inner radiation belt surrounding Earth, caused by the planet's slow rotation. This structure is produced by the oscillating electric field generated by Earth's magnetic field axis.
Scientists have discovered a persistent structure in Earth's inner radiation belt, resembling zebra stripes, due to the planet's slow rotation. The striped pattern is visible even during low solar wind activity and is caused by an oscillating electric field generated by Earth's magnetic field axis.
A new zebra-striped structure of highly energized electrons has been discovered in Earth's inner radiation belt by an NJIT physicist. This structure, formed by the slow rotation of Earth, could pose a threat to humans in space and damage navigation and communication satellites.
New NASA Van Allen Probes observations help scientists test and improve a model to forecast radiation environment changes in near-Earth space. By combining data from the Van Allen Probes with computer simulations, researchers can better predict how particles and energy affect the Earth's atmosphere.
The Van Allen Probes have provided high-resolution measurements that suggest local acceleration is at work in the Earth's radiation belts. This discovery resolves decades of uncertainty over the origin of ultra-relativistic electrons and has important implications for understanding planetary magnetospheres throughout the universe.
Researchers have found that scattering by intense natural radio waves known as 'chorus' in the Earth's upper atmosphere is primarily responsible for the observed relativistic electron build-up. This discovery resolves decades of scientific controversy and has important practical applications for understanding planetary magnetospheres.
Researchers launched two small satellites, FIREBIRD, into the outer radiation belt to investigate microbursts, which can pose a risk to spacecraft. The mission aims to improve our understanding of the radiation belts and design more resilient satellites.
The study found that low-frequency waves, known as Ultra-low frequency (ULF) waves, accelerate particles in the radiation belts to near-light speed. This mechanism has important implications for understanding cosmic particle acceleration throughout the universe.
The Van Allen Probes mission reveals that high-energy particles in Earth's radiation belts can be accelerated to nearly the speed of light by ultra-low frequency electromagnetic waves. Scientists hope to use this discovery to better predict space weather conditions and protect orbiting satellites.
Researchers using Van Allen Probes discovered ultra-fast particles driving a previously unknown configuration of three bands in the Earth's radiation belts. Computer simulations show that one common acceleration method doesn't apply to these particles.
A team of UCLA scientists successfully modeled and explained the unprecedented behavior of a previously unknown third radiation ring around Earth. The region was found to consist of different populations driven by various physical processes, with ultra-relativistic electrons posing significant hazards to satellites.
Scientists have identified an internal electron accelerator operating within the Van Allen radiation belts, causing sudden and unpredictable changes. The research paves the way for predicting hazardous space weather and preparing satellite operators for intense space storms.
Scientists discovered a massive particle accelerator in the heart of the Van Allen radiation belts using NASA's Van Allen Probes mission. The acceleration energy is found within the belts themselves, helping to improve predictions of space weather and satellite safety.
Scientists have discovered a massive particle accelerator in the heart of the Van Allen radiation belts, accelerating particles to over 99% the speed of light. Local energy sources within the belts cause the acceleration, like a perfectly timed push on a moving swing.
Scientists have discovered a massive particle accelerator in the Van Allen radiation belts, revealing that particles are sped up by a local energy source. This discovery answers a longstanding question and will help make predictions of space weather conditions.
Two University of Iowa researchers have answered a long-standing question about the Earth's Van Allen radiation belts. They found that electrons can gain energy inside the belts through local acceleration in the heart of the radiation belts. The discovery was made using measurements from NASA's twin Van Allen Probes mission satellites.
Scientists have advanced knowledge of Earth's Van Allen radiation belts by determining that electrons can gain energy inside the belts. The researchers used NASA's twin Van Allen Probes mission satellites to examine two possibilities and found that local acceleration occurs in the heart of the radiation belts.