Hualien 403 Strong Earthquake (Photo/Provided by Hualien County Government)
[周刊王CTWANT] The scale of the Hualien 403 earthquake was stronger than the 918 Chishang earthquake in 2022, but there was no ground rupture. In this regard, Wang Yu, an associate professor in the Department of Geological Sciences at the National Taiwan University, pointed out that the location of the fault zone of the strong 7.2 earthquake in the eastern sea seems to be the epicenter. far away from the land, and the depth of the earthquake is deep. there was no conflict, which is a blessing in the midst of misfortune.
On April 3, a strong earthquake with a magnitude of 7.2 occurred off the coast of Hualien Until now, there are more than 900 main shocks and after, the cause of this strong earthquake is still unknown, and it is impossible can be confirmed Wang Yu believes that it is still to be confirmed which fault caused this earthquake, according to the current data, the strong 403 earthquake should be caused by a fault under the Coast Mountains, which runs. from the sea near Yanliao Village in Hualien to the north, extending to the sea outside Hualien Heping Village, and the main underground faults are located in the area from Hualien City to the north of the Liwu River 45 kilometers long , but has nothing to do with the Milun Fault.
Wang Yu also explained that the center of the strong 403 earthquake has been around 6 to 6.5 in the past 20 years, and no major earthquake has occurred above 7. In comparison, 2 Dh the previous Chishang earthquake caused surface rupture of more than 30 kilometers; the 0206 Hualien earthquake also caused surface rupture along the Milun Fault and the Lingding Fault.
Wang Yu also analyzed that the reason might be that the fault zone of the 7.2 strong earthquake was located at sea, far away from the land, and the epicenter was deeper, so it did not it caused only 40 to 45% surface disturbance on land. There was a centimeter rise of the land along the coast of Hualien Port, extending south to near Yanliao and north to Hualien and Heping, and the 45-centimeter land rise is not large. Taking 921 as an example, there was a rise of more than 2 to 3 meters across the lake; Chishang 2022 918 earthquake The maximum elevation was more than 1 meter; considered a blessing in the midst of misfortune. Regarding how much the surface of the seabed has risen, and whether faults on the seabed are breaking, more marine studies and scientific research are needed.
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2024-04-20 10:03:02
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