Mysterious blue light appeared in the sky before the 7.8-magnitude earthquake in Turkey Science popularization: it is earthquake light, very rare
At 9:17 on February 6, Beijing time (4:17 on February 6, local time),A magnitude 7.8 earthquake struck Turkey at a depth of 20 kilometers.
The magnitude of the earthquake was quite high. It not only caused many casualties and collapsed houses in Turkey, but also caused serious damage to its neighboring Syria.
Before the earthquake, someone photographed a rare scene in Hatay, Turkey: first there was a rustling sound,Then a mysterious blue light appeared in the skyand then the sound became louder and louder, accompanied by violent shaking, quite frightening.
The blue light that appeared in the sky before the earthquake has attracted the attention of many people. Similar situations have happened before. In September 2021, a strong earthquake with a magnitude of 7.1 on the Richter scale occurred in southwestern Mexico, and a mysterious blue light appeared in the sky. Coincidentally, A similar situation also occurred during the 8.1-magnitude earthquake in Mexico in 2017.
So what exactly is this light? Friedemann Freund, a visiting professor of physics at San Jose State University and a senior researcher at NASA’s Ames Research Center, explained,Known as an earthquake light, this blue light comes in a variety of shapes and colors.
It is understood that the earthquake light is not only blue, there are even records of colorful flashes, and the duration is also different, some of which only flash for a few seconds, while others can last for tens of minutes.
How do earthquake lights form? There are no clear research results about it at present, and scientists have given guesses:
1. There are small defects in igneous rock crystals. During seismic activity, they are crushed and damaged by strong stress, and the peroxygen bonds are broken, thereby ionizing oxygen anions. These ions move upward through rock cracks and then diffuse into the atmosphere , they ionize the air, forming a glowing plasma.
2. The local destruction of the earth’s magnetic field or ionosphere in the region of tectonic stress,glow effect; or tectonic stress produces a piezoelectric effect, when rocks containing quartz are squeezed in a certain way, a strong electric field will be generated, and when this voltage is released into the air, it will ionize the air and emit bright light The principle of electro-optic, which is called triboluminescence.
Earthquake lights are not common,It usually occurs before or during a large-scale earthquake, but it may also occur several weeks in advanceIn the future, through the study of seismic light, it may be possible to predict the occurrence of major earthquakes in advance and reduce the loss of life and property caused by earthquakes as much as possible.
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