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The main cause of this earthquake is that the Indo-Australian tectonic plate pushed into the Eurasian plate to which Korea belongs. Therefore, earthquakes of magnitude 5 or greater can occur anywhere in Korea, and experts explain that it is necessary to look at the connection with volcanic activity, especially in Jeju.



Reporter Jung Gu-hee reports.



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Since 1978, when the Korea Meteorological Administration started to measure earthquakes automatically, there have been 16 strong earthquakes of magnitude 3 or greater in Jeju waters.



In particular, including the earthquake yesterday (14th), the southwest coast of Jeju is prone to earthquakes.



The biggest cause of earthquakes in Korea is that the Indo-Australian plate pushes toward Korea and exerts force, and yesterday's earthquake is also analyzed for the same cause.



[Yoonsu Lee / Professor, Department of Environmental Engineering, POSTECH: The Indian-Australian plate is lifting Eurasia. That's the Himalayas in the end.] As we are



constantly receiving power, strong earthquakes with a magnitude of 5 or more can occur anywhere in our country where the ground is broken, that is, where there is a fault.



Fault investigation is urgently needed, but it will take another 20 years to investigate inland faults alone, and very little is known about ocean faults.



It has nothing to do with yesterday's earthquake, but in the case of Jeju Island, volcanic activity should also be looked at.



The geologists view Mt. Halla as an active volcano.



According to recent research results, it is estimated that Brother Island was created in the southwestern part of Jeju Island about 9200 years ago, and Songaksan Mountain was created 3700 years ago by a volcanic eruption.



Also, it seems that there was a volcanic eruption 1,000 years ago, judging from the records that four holes were opened in Jeju area, red water gushed out and turned into stones, and the earth rose from the sea with a thundering vibration.



However, it has not yet been confirmed whether there is magma underground like Mt. Baekdu.



At the national level, active research on volcanic activity is needed along with investigations of seafloor faults.



(Video Edit: Kim Jun-hee)



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