Researchers in collaboration with ATOMKI have determined the date of a prehistoric solar flare, the institute informed MTI on Saturday.
The researchers showed that extreme solar activity, a powerful solar flare previously dated to 660 BC, actually occurred in the summer of 664. Several scientific publications have already been published about this event. An international cooperation was organized between researchers to determine its timing and intensity.
The researchers examined samples from sites in Siberia, the Yamal Peninsula and the Altai Mountains. The results obtained were compared with previously known data for German oak and Japanese cedar trees.
The researchers found a discrepancy in the temporal location of the radiocarbon signal peaks, which corresponds to a time difference of one to two years.
Using the carbon-14 cycle model, they were able to coordinate the different dates of the events.
During the work of the Sun, periods of greater intensity occur, the characteristic manifestations of which are solar flares and flares, that is, a sudden and strong glow of a specific part of the solar atmosphere. These can cause changes in the Earth's atmosphere and create geomagnetic storms. Its astonishing result was that the aurora borealis could be seen far south beyond the usual geographical latitudes, and in summer, for example, it was visible even in Greece.
There are historical records of intense solar activity, traces of which can be detected in tree rings thanks to the large amount of radiocarbon isotopes produced in the atmosphere. The best documented event discovered to date occurred in the years 774 and 775, which has been discovered through tree year rings in 34 different locations around the world, in both the Northern and Southern Hemispheres.
The research results were published in the journal Earth and Environmental Communications. More information a HUN-REN Nuclear Research Institute It can be read on their website.
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