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wikipedia) Breaking News: LOFAR radio telescope reveals secrets of solar storms - News Paper
An international team of scientists led by a researcher from Trinity College Dublin and University of Helsinki announced a major discovery on the very nature of solar storms in the journal
Nature Astronomy.
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The Sun and a radio burst captured in September 2017 by a NOAA spacecraft and the LOFAR radio telescope
[Credit: NOAA, LOFAR] |
The team showed that solar storms can accelerate particles simultaneously in several locations by combining data from the Low Frequency Array, LOFAR, with images from NASA, NOAA and ESA spacecraft.
The Sun is the closest star to our planet in the Universe, and like many stars, it is far from quiet. Sunspots, many times the size of Earth, can appear on its surface and store enormous reservoirs of energy. And it is within these regions that huge explosions called solar storms occur. Solar storms are spectacular eruptions of billions of tonnes of hot gas travelling at millions of kilometres an hour. The Nature paper studied a particularly large solar storm on September 10, 2017, soon after the LOFAR station in Ireland had been turned on.
How to predict space weather
"Our results are very exciting as they give us an amazingly detailed insight into how solar storms propagate away from the Sun and where they accelerate fast particles with speeds close to the speed of light", says Dr Diana Morosan, the lead author on the publication, and affiliated with Trinity College Dublin and the University of Helsinki.
These results may in the future help us to produce more accurate forecasts of when solar radio bursts occur and how the solar storm impacts the Earth. If they impact the Earth, they can produce beautiful displays of the aurora, but they can also cause problems with communication and navigation systems and power grids.
Our society is now even more dependent on technology, and solar storms have the potential to cause significant effect on their performance.
In 1859, the largest solar storm ever observed - the so-called Carrington Event - erupted. Within hours, it generated displays of the aurora as far south as Italy and Cuba and caused interruptions in early telegraph systems in Europe and the US.
In 2003, transformers in South Africa were damaged, while Swedish air traffic control systems were closed down in 2015 for more than an hour due to effects associated with a solar storm. More than 50 satellites reported problems. More recently, emergency response communications were interrupted during hurricane season in September 2017 in the Caribbean.
"We used data from the Low Frequency Array, LOFAR, together with images from NASA, NOAA and ESA spacecraft to show where solar storms accelerate fast particles", says Morosan.
Source: University of Helsinki [February 19, 2019]
from The Archaeology News Network https://ift.tt/2NiNRo4
Breaking News: LOFAR radio telescope reveals secrets of solar storms - News Paper
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