A magnitude-7.3 earthquake struck China’s Taiwan region recently, marking the most devastating seismic event in the area in 25 years. The quake was felt across the Taiwan Strait, causing strong tremors in Southeast China.
According to Gao Mengtan, a researcher at the Institute of Geophysics of the China Earthquake Administration, the earthquake is closely related to the unique geographical conditions of the island of Taiwan. “The entire Taiwan region is located at the junction of the Philippine Plate and the Eurasian Plate, with the Philippine Plate subducting under the Eurasian Plate,” Gao explained in an interview with CGTN. “This causes very intense tectonic movements in the area and frequently triggers strong earthquakes.”
Gao noted that, on average, there’s a strong earthquake of magnitude 7 or above every seven to eight years in the region. He emphasized the importance of preparing for strong aftershocks following a major earthquake. “Whenever such an earthquake occurs, it’s crucial to be prepared for the possibility of strong aftershocks,” he said, pointing out that a magnitude-6 aftershock had already occurred.
Historically, after the magnitude-7.3 earthquake in 1951, there were four subsequent aftershocks each registering over magnitude-7, highlighting the need for vigilance. Gao warned about the potential for further damage due to secondary disasters such as landslides and rockfalls, especially if follow-up earthquakes occur. “The major earthquake has already caused considerable damage to buildings, infrastructure, and mountainsides,” he said. “If a large earthquake subsequently occurs, the risk of buildings or mountains collapsing, landslides, and rockfalls dramatically increases.”
He stressed the necessity of implementing emergency rescue efforts and taking precautions against further damage. Gao also explained why residents in China’s southeast coastal megacities felt strong tremors. In areas with many tall buildings, the sensation of an earthquake can be amplified. “This makes it possible for more people to feel the vibrations caused by a magnitude-7 earthquake occurring as far away as across the Taiwan Strait,” he said.
Another factor is that sedimentary plains’ soil layers can amplify seismic waves. “Many of the high rises in our southeastern coastal cities are built on these soil layers, resulting in the seismic sensation being doubly amplified,” Gao explained. However, he reassured that while the vibrations might feel intense, they are not enough to cause serious damage to buildings and infrastructure in these areas.
Residents are advised to remain vigilant and follow safety guidelines in the aftermath of the earthquake.
Reference(s):
Intense tectonic movement causes strong tremors in SE China: expert
cgtn.com
