A 5.6-magnitude “independent earthquake” occurred off the eastern seaboard in the early morning. Why was Taipei so shaking? The Meteorological Administration gives the answer | Life | Sanli News Network SETN.COM

Life Center/Reported by Shi Yuyun

▲A magnitude 5.6 earthquake occurred in the eastern waters of Taiwan at 2:11 a.m. (Photo/Central Meteorological Administration)

According to data from the Central Meteorological Administration, a 5.6-magnitude earthquake occurred in the eastern waters of Taiwan at 2:11 a.m. today (25th), and another 5.5-magnitude earthquake occurred less than a minute later. It was felt across Taiwan, and many people were shaken from their sleep. Wake up, people reported that Taipei was particularly shaken this night. In this regard, Wu Jianfu, director of the Earthquake Forecasting Center of the Meteorological Administration, gave the answer, saying that it is the characteristics of the “Nanao Basin” earthquake. If you live in the Taipei Basin or in a taller building, the vibration will be amplified due to site effect and building effect.

An extremely shallow earthquake with a magnitude of 5.6 occurred in the middle of the night. Many people woke up from their sleep and turned on the live broadcast of the earthquake monitoring system. At one time, more than 80,000 people watched online and reported the situation in various places. Some netizens said that Taipei was particularly shaken tonight.

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Wu Jianfu pointed out in the early morning of the 25th that the epicenter of the earthquake was located in the Nan’ao Basin. “The Nan’ao Basin is a basin formed when the Philippine Sea Plate began to subduct downwards under the Eurasian Continent Plate. Earthquakes often occur here. This earthquake is similar to 403 “The earthquake has nothing to do with it” and is an independent event.

Wu Jianfu said that the characteristics of earthquakes in this area are that the depths are mostly between 20 and 40 kilometers, which are shallow earthquakes. The focal mechanisms are mostly normal faults and are large in scale, causing them to be felt throughout Taiwan. Because they are far away from the mainland, they are closer to the mainland. The eastern region of the epicenter experienced greater external shaking, while other regions had smaller impacts.

Why does Taipei feel so rocky? Wu Jianfu gave an example. If there was an earthquake in the Nan’ao Basin, the magnitude of the earthquake in Hualien would be about magnitude 3. In other areas, it would be magnitude 1 to 2. However, if the earthquake occurs in the early morning, if you live in the Taipei Basin or in a taller building, it will be different from the building due to site effects. Effect vibrations will have an amplifying effect.