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SOLAR TSUNAMI HIT EARTH 9,200 YEARS AGO

Scientists examining ancient ice cores have found radioactive evidence of an extreme solar storm that took place in 7,176 BCE.

An international research team has reported the findings of falling solar storms buried in ancient ice. The fact that the eruption happened at a time when the sun was supposed to be silent is perhaps more surprising than the magnitude of the storm.

Ice cores are long cylinders drilled into ice and ice caps, a solid term that allows scientists to recreate events from the distant past. The weight of the snow compresses the layers of snow each year to form dense glaciers containing gases, aerosols and particles. The thick ice sheets of Antarctica and Greenland provide excellent and detailed information on a wide range of events that occurred around 800,000 years ago, including changes in solar activity. . When strong electrons collide with atoms in the upper atmosphere, three radioisotopes are formed: carbon-14 (half-life 5,700 years), beryllium-10 (half-life 1.4 million years) and chlorine-36 (half-life 5700 years). -life 300,000). years). ). The rate of formation of cosmic isotopes depends on the intensity of cosmic electricity, but the strength of the Earth's magnetic field, which can deflect many charged particles, also plays a role.

In general, most emitters are galactic cosmic rays, protons emanating from distant supernovae and active galaxy nuclei. Our Earth is still affected by the solar wind, but this flow of microscopic particles protects us from strong electrical currents.

The sun is usually a lucky star, but it can affect for a while. When the sun's magnetic field twists and breaks, a massive explosion called a coronal mass ejection (CME) can eject millions of tons of charged matter into space and accelerate it to over a million miles per hour. . If Earth were to be in the path of one of the magnetic plasma bubbles, the resulting geomagnetic storm could cause significant damage to satellites, network, radio navigation and communications.

When Chiara Paleari (Lund University, Sweden) and her colleagues observed concentrations of cosmogenic isotopes in glaciers in three regions of Greenland and Antarctica, they found significant cosmogenic implications about 9,198 years ago. Beryllium-10 suddenly increased 3-4 times later and Chlorine-36 increased 6 times. It could be the world's worst solar storm fall in the past 10,000 years, they told Nature Communications. In comparison, the strongest geomagnetic storms observed directly from the Carrington event of 1859 are at least ten times less powerful.

The coronal mass ejection is 15 times more likely to occur near the 11-year solar activity maximum. However, the solar tsunami of 9,200 years ago and the slightly stronger tsunami that occurred about 1,250 years ago occurred near solar minimum. In modern times, the 1903 Solar Storm also happened shortly after the solar eclipse, which had a significant impact on phones and image quality.

Is there any doubt in our understanding of the behavior of the sun? It's not just a matter of education. Similar storms today could send dangerous or deadly radiation to sailors and passengers, scorch power from orbiting satellites and damage targets.


The Scientific Committee of the International Scientific Council on Solar-Terrestrial Physics is a collaborative effort to understand the various activities the sun has reported in the past and to predict what it will do in the future. . NASA has also selected two research projects: Multi-Slit Solar Explorer (MUSE) and HelioSwarm to improve our understanding of the fundamentals of solar instability and climate change.

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