A new coronal hole on the surface of the sun..Does it threaten Earth?


About one week after observing a coronal hole huge enough to fit 30 adjacent globes to cover its diameter, researchers from the US National Oceanic and Atmospheric Administration (NOAA) discovered that the surface of the sun contains a new hole that may cause some ground disturbance by Friday or Saturday. arrivals.
Coronal holes are areas where the atmosphere surrounding the sun (the corona) is cooler than usual, and therefore appears darker in images, but it is not originally black as it appears in astronomical images.

The reason for the occurrence of these holes is that the plasma in these areas in particular is less dense than the average due to the low levels of energy and gas, and this occurs due to natural imbalances in the magnetic field of the sun. solar wind Holes of this type allow the solar wind to escape more easily into space, resulting in currents of the relatively fast solar wind. The solar wind is energy-charged particles emanating from the sun and spreading throughout the solar system, and as soon as it reaches one of the planets (such as Earth) it interacts with its magnetosphere, and this is what causes the phenomenon of the aurora borealis, which is usually seen from areas near the north and south poles. . And because the newly discovered coronal hole is located at the solar equator, it raises the possibility of a direct blow from the solar wind towards Earth. Completely safe But unlike many social media posts that exaggerate the matter, this type of strike usually passes peacefully, in addition to causing dense images of the aurora borealis, and sometimes causing some satellite malfunctions. According to the US National Oceanic and Atmospheric Administration, the space weather during the coming days ranges between classifications “R1” (R1) and “R3” (R3), which means that the matter may reach varying and temporary interruptions in radio communications in some areas. blow all hold In any case, the most severe space weather, which takes the order "R5", leads to a complete high-frequency radio blackout on the Earth's side facing the solar wind, which lasts for several hours, and results in no high-frequency radio communication with sailors and pilots. Besides, the low-frequency navigation signals used by naval aviation systems and general aviation systems suffer from sporadic interruptions, which may cause loss of positioning service for several hours.
However, the probability of space weather occurring in this way is less than 1 for each solar cycle (11 years), and space weather forecasting systems help the competent authorities avoid these problems without significant incidents

Popular posts from this blog

Climate Change Urgency

Image
Climate change is a pressing issue that is affecting our planet in profound ways. The burning of fossil fuels, deforestation, and other human activities have resulted in an increase in greenhouse gas emissions, causing global temperatures to rise and leading to a range of negative impacts, including more frequent extreme weather events, rising sea levels, and the loss of biodiversity. Urgent climate change measures are needed to mitigate the worst effects of climate change and safeguard our planet for future generations. Here are some of the most important measures that need to be taken: Phasing out fossil fuels The world needs to transition away from fossil fuels as quickly as possible to reduce greenhouse gas emissions. This means investing in renewable energy sources like wind and solar power and phasing out the use of coal, oil, and gas. Investing in public transportation Encouraging people to use public transportation instead of driving cars is an important step in reducing greenh...
Read more

Acceleration of Humanitarian Response to address the emerging needs of calamity hits areas in Balochistan, Pakistan

Image
   Situation overview It’s been almost 7 months to the floods ravaging almost every part of Pakistan. The scale of devastation has been really high that families may not years to recover from the loses they bared. According the last situational report of UNOCHA still 1.8 million people are residing near polluted and stagnant floodwater ponds. As many of the people are living in temporarily shelters without having access to basic, the nutrition, food security and public health matter remain the highest concern.   In Balochistan the Naseerabad division have been affected mostly by the torrential floods and aftermaths are further worse. Due to the contaminated still water, there is rise in the cases of malaria and water born disease in Naseerabad division, this may further accelerate when the summer season will be on its peak from April 2023. The Naseerabad region is well known for its hot weather condition where temperature rise from 40 to 50 degree Celsius. The extreme...
Read more