Mongolia witnesses skies turning mysteriously ‘blood red’

In an extraordinary celestial phenomenon, Mongolia witnessed a rare auroral event recently that transformed its skies into a deep, blood-red hue. The stunning colouration was the result of a significant solar storm's initial impact on Earth, leaving spectators in awe.

Traditionally, auroras, also known as the Northern Lights or Aurora Borealis, occur closer to the poles and typically appear green in color. However, Mongolia experienced an exceptional display with auroras adorned in a striking crimson hue.
This rarity is attributed to the interaction between solar particles and oxygen at high altitudes, specifically over 241 km above the Earth's surface, where the atmosphere is notably thinner.
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The distinct shade of red observed is considered one of the rarest colors of the Northern Lights and is closely tied to periods of heightened solar activity. The ongoing solar storm responsible for this phenomenon resulted from multiple coronal mass ejections (CMEs) from the Sun, occurring on November 27, 2023, with the initial wave reaching Earth on November 29.

The red auroras emerged as a consequence of solar particles colliding with oxygen molecules at higher altitudes. Due to the lower density of oxygen at such great heights, these collisions occur less frequently, leading to the emission of red light instead of the more commonly observed green. This process is akin to the operation of neon lights, where excited gas atoms release photons of light upon returning to their ground state.
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Historically, red auroras have been associated with powerful geomagnetic storms, such as the Carrington Event of 1859, the most intense solar storm on record. During this event, red auroras were reported as far south as the Caribbean and Mexico, creating skies so bright that birds began to sing, mistaking the illuminated night for morning.
Mongolia's occurrence of the red aurora provides scientists with a unique opportunity to study the effects of solar storms at lower latitudes. While the spectacle is mesmerizing, it serves as a reminder of the Sun's immense power and the potential impact of solar weather on our technologically dependent society.
As the solar cycle progresses towards its predicted peak in 2024, skywatchers can anticipate more displays of auroral beauty. Yet, few may rival the intensity and rarity of Mongolia's blood-red skies, marking a celestial event that will be remembered for its exceptional and awe-inspiring nature.