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A group of scientists has discovered an “invisible path of propagation” of electromagnetic waves around the Earth, using data on electromagnetic (EM) waves and plasma particles measured simultaneously across a range of different satellites.
Several types of electromagnetic waves around the planet occur naturally in the geographical space of the Earth, and cause changes in the plasma environment that surrounds the Earth through a physical process known as “wave-particle interaction”.
Electromagnetic waves become more active, in conjunction with the occurrence of space storms caused by disturbances of the sun and solar wind, and changes in the geographical space environment may sometimes cause damage to spacecraft, expose astronauts to radiation, or disrupt electricity and energy networks on Earth.
Dec 6, 15:47 GMT
To understand the nature of the variations and differences in the plasma environment caused by these waves in space, a set of measurements were made at several space locations by spacecraft such as the Japanese “Arase” spacecraft.
In order to properly understand the effects of electromagnetic waves, especially as they spread far away from their source, it is necessary to understand where electromagnetic waves are generated in space and how they spread. But it is difficult to unravel the origin of electromagnetic waves and the enigmas of their spatially propagation using only single-point observation.
The “electromagnetic ionic cyclotron waves (EMIC waves)”, which this study focused on, are an important class of geospatial electromagnetic waves that induce changes in the geospatial plasma environment. This wave has a limited spatial source. The source region of the ionic mode waves has a limited spatial range. EMIC waves propagate from the north of the planet to the south along the geomagnetic field lines.
I once thought about how to learn the electromagnetic spectrum in #physics It can be brought to life by seeing how we can use different wavelengths to measure the properties of the Earth from space? 〰️📡🛰️ Photo credit: Tweet embed 3/7 pic.twitter.com/nEZQpiGrJJ
– SENSE Earth Observation CDT (EoCdt) December 10, 2021
A group of probes detected the presence of waves similar to “EMIC” waves near the geomagnetic equator, which indicates the existence of a propagation path for “EMIC” waves between space and Earth.
The Arase probe observed the presence of EMIC waves in the mid-latitudes and contributed to the determination of the spatial size of the propagation path.
According to the article, accurate measurements of plasma particles obtained from Arase and Van Allen Probes showed that EMIC waves activate thermal ions as they propagate along the “propagation path”; Thus, it causes changes in the surrounding plasma environment, according to the published article In the scientific journal “phys”.
It is known that “EMIC” waves produce proton aurora, and the results of this study can be interpreted as showing the path taken by the energy that is the source of the proton aurora when propagating from space to Earth.
In a first approximation, the Earth’s magnetic field is a dipole, its poles located near the poles of the planet. A magnetic field is a type of electromagnetic field created by moving charges or electric currents and exerting a force on moving charges. pic.twitter.com/ClPKcVJF9U
– Ninel. (@AbbessNina) December 10, 2021
The study also revealed the “propagation path” to direct “EMIC” waves from space to Earth, by understanding the location of the waves’ source in space and how they spread, which could explain the mechanism by which the space plasma environment simultaneously occurs in the vast geographical space, and will contribute The results of this study improve the accuracy of space weather forecasting.
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