A rare oscillation of Earth’s magnetic field was detected last Tuesday and almost the entire planet.
Magnetic fields are not abnormal in the world, however, this generates consternation in the scientific community since the magnetic fields are produced by solar storms or geomagnetic storms that cause the disturbance, in this case, neither of the two above produced it.
Earth’s quiet magnetic field was unexpectedly disturbed by a wave of magnetism that rippled around the globe for more than 30 minutes.
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So what happened is considered a magnetic anomaly that extended from Hawaii to China for 30 minutes.
The rare activity was detected by Intermagnet (global network of observatories that monitor the planet’s magnetic field). They even assure that it was also located in the Arctic Circle and in Antarctica.
Like Intermagnet, the UK magnetometers at Preston. As well as the magnetometer located in the Lofoten Islands of Norway recorded it.
“It was remarkable, our magnetic field moved back and forth by about 1/3 of a degree. I also detected ground currents with the same 10-minute period,” Rob Stammes, who runs the magnetometer in Norway, told international media.
“Currently the sun is in a calm state that we could even say we have not found in the deepest minimum of solar activity in a century,” explained scientist Tony Phillips on his social networks, completely ruling out that it could have been caused by a geomagnetic storm.
To further confirm the theory, data from the Deep Space Climate Observatory (DSCOVR) from the National Oceanic and Atmospheric Administration of the United States (NOAA), showed no increase in the speed of the solar wind or other factors that could explain the disturbance.
Dropped pin effect
In the world of space physics the phenomenon behind this anomaly is known as “continuous pulsation” or “PC” waves.
Imagine yourself blowing on a piece of paper, making it flutter with your breath. The solar wind can have a similar effect on magnetic fields. The waves are essentially flutters that propagate along the flanks of the Earth’s magnetosphere excited by the sun’s breath. During the most active phases of the solar cycle, these flutters are easily lost in the noise of noisy geomagnetic activity. But during the extreme stillness of the Solar Minimum, such waves can be heard like a pin falling into a quiet room, “Phillips told Reuters news.
The PC waves are classified into 5 types according to their period. The 10-minute wave on June 23 falls into the Pc5 category. Slow Pc5 waves have been linked to a loss of particles from the van Allen radiation belts. Energetic electrons surf these waves into Earth’s atmosphere, where they dissipate without causing harm.
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