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Categories: Geoscience: Geomagnetic Storms, Space: Cosmology

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Geoscience: Geomagnetic Storms Space: The Solar System
Published

The case of the cloudy filters: Solving the mystery of the degrading sunlight detectors      (via sciencedaily.com)     Original source 

Sun-facing satellites monitor the Sun's ultraviolet (UV) light to give us advance warning of solar storms. But over the course of just a year or two, the metal filters in the detectors mysteriously lose their ability to transmit UV light. Now, scientists have found the first evidence indicating that carbonization is not the problem.

Geoscience: Geomagnetic Storms Space: The Solar System
Published

The aurora's very high altitude booster      (via sciencedaily.com) 

Electrons arriving from the Sun are propelled by electrical energy generated as high as 30,000 kilometers above Earth, ultimately creating the dazzling displays of the northern and southern lights.

Geoscience: Geomagnetic Storms Space: Exploration
Published

'Space hurricane' in Earth's upper atmosphere discovered      (via sciencedaily.com) 

Analysis of observations made by satellites in 2014 has revealed a long-lasting 'space hurricane' -- a swirling mass of plasma several hundred kilometers above the North Pole, raining electrons instead of water.

Geoscience: Geomagnetic Storms
Published

Ancient relic points to a turning point in Earth's history 42,000 years ago      (via sciencedaily.com) 

The temporary breakdown of Earth's magnetic field 42,000 years ago sparked major climate shifts that led to global environmental change and mass extinctions, a new international study shows.

Geoscience: Geomagnetic Storms
Published

How do electrons close to Earth reach almost the speed of light?      (via sciencedaily.com) 

In the Van Allen radiation belts, electrons can reach almost the speed of light. Researchers have revealed conditions for such strong accelerations. They had demonstrated in 2020: during solar storm plasma waves play a crucial role. However, it remained unclear why ultra-relativistic electron energies are not achieved in all solar storms. They now show: extreme depletions of the background plasma density are crucial.

Geoscience: Geomagnetic Storms
Published

The upside of volatile space weather      (via sciencedaily.com) 

Although stellar flares are typically viewed as a detriment to habitability, study shows 'life might still have a fighting chance.' Researchers find that flares drive a planets atmospheric composition to a new chemical equilibrium.

Geoscience: Geomagnetic Storms
Published

Can ripples on the sun help predict solar flares?      (via sciencedaily.com) 

Scientists discovered in 1996 that sunquakes are linked to solar flares. Now, using helioseismic holography, scientists have analyzed a 2011 flare and shown that the impulsive source that generated the sunquake, and the refracted acoustic waves that later rippled the solar surface, was submerged 1,000 kilometers below the photosphere and flare. Further sunquake study could reveal if submerged sources are common and whether they can predict the appearance of flares and potential impact on Earth.

Geoscience: Geomagnetic Storms
Published

NASA's IRIS spots nanojets: Shining light on heating the solar corona      (via sciencedaily.com) 

Researchers report the first ever clear images of nanojets -- bright thin lights that travel perpendicular to the magnetic structures in the solar atmosphere, called the corona -- in a process that reveals the existence of one of the potential coronal heating candidates: nanoflares.

Geoscience: Geomagnetic Storms
Published

Solar storm forecasts for Earth improved with help from the public      (via sciencedaily.com) 

Scientists used observations recorded by members of the public to increase accuracy of computer model predictions of when harmful CMEs will hit Earth.

Geoscience: Geomagnetic Storms
Published

First physics-based method for predicting large solar flares      (via sciencedaily.com) 

A research team recently succeeded in developing the first physics-based model that can accurately predict imminent large solar flares, which can cause severe space weather disturbances affecting Earth.

Geoscience: Geomagnetic Storms
Published

Researchers track slowly splitting 'dent' in Earth's magnetic field      (via sciencedaily.com) 

Earth's magnetic field acts like a protective shield around the planet, repelling and trapping charged particles from the Sun. But over South America and the southern Atlantic Ocean, an unusually weak spot in the field -- called the South Atlantic Anomaly, or SAA -- allows these particles to dip closer to the surface than normal.

Geoscience: Geomagnetic Storms
Published

NASA data helps new model predict big solar flares      (via sciencedaily.com) 

Scientists have developed a new model that successfully predicted seven of the Sun's biggest flares from the last solar cycle, out of a set of nine. With more development, the model could be used to one day inform forecasts of these intense bursts of solar radiation.

Geoscience: Geomagnetic Storms
Published

Breakthrough method for predicting solar storms      (via sciencedaily.com) 

Extensive power outages and satellite blackouts that affect air travel and the internet are some of the potential consequences of massive solar storms. These storms are believed to be caused by the release of enormous amounts of stored magnetic energy due to changes in the magnetic field of the sun's outer atmosphere - something that until now has eluded scientists' direct measurement. Researchers believe this recent discovery could lead to better 'space weather' forecasts in the future.

Geoscience: Geomagnetic Storms Space: The Solar System
Published

Alaskan seismometers record the northern lights      (via sciencedaily.com) 

An aurora sightseeing tour leader in Alaska, was lucky enough to photograph a 'eruption' of brilliant pink light in the night skies one night in February.

Geoscience: Geomagnetic Storms
Published

South Atlantic anomalies existed 8 - 11 million years ago      (via sciencedaily.com) 

Research has revealed that strange behavior of the magnetic field in the South Atlantic region existed as far back as eight to 11 million years ago, suggesting that today's South Atlantic Anomaly is a recurring feature and unlikely to represent an impending reversal of the Earth's magnetic field.

Geoscience: Geomagnetic Storms
Published

Mystery of solar cycle illuminated      (via sciencedaily.com) 

The sun's convection zone plays a key role in the generation and evolution of the Sun's magnetic field. Analyzing data sets spanning more than 20 years, researchers have obtained the most comprehensive picture of the north-south flow of plasma in the convection zone ever. The flow goes around the convection zone in each hemisphere in about 22 years.

Geoscience: Geomagnetic Storms
Published

New 'sun clock' quantifies extreme space weather switch on-off      (via sciencedaily.com) 

Extreme space weather events can significantly impact systems such as satellites, communications systems, power distribution and aviation. They are driven by solar activity which is known to have an irregular but roughly 11 year cycle. By devising a new, regular 'sun clock', researchers have found that the switch on and off of periods of high solar activity is quite sharp, and are able to determine the switch on-off times.

Geoscience: Geomagnetic Storms
Published

New research deepens understanding of Earth's interaction with the solar wind      (via sciencedaily.com) 

Scientists have reproduced a process that occurs in space to deepen understanding of what happens when the Earth encounters the solar wind.

Geoscience: Geomagnetic Storms
Published

New sunspots potentially herald increased solar activity      (via sciencedaily.com) 

On May 29, 2020, a family of sunspots -- dark spots that freckle the face of the Sun, representing areas of complex magnetic fields -- sported the biggest solar flare since October 2017. Although the sunspots are not yet visible (they will soon rotate into view over the left limb of the Sun), NASA spacecraft spotted the flares high above them.

Geoscience: Geomagnetic Storms
Published

Solar storms may leave gray whales 'blind' and stranded      (via sciencedaily.com) 

A new study offers some of the first evidence that gray whales might depend on a magnetic sense to find their way through the ocean. This evidence comes from the discovery that whales are more likely to strand themselves on days when solar storms disrupt Earth's magnetic field.