Why does the high -rise building of Zhejiang Hualien 6.9 earthquakes feel the ground without feeling?

Zhejiang News Client Editor Yuan Longhai Liang Liang Du Lingli Fan Chengyou Reporter Zhu Cheng Li Hua Wang Bo Yuan Jiaying

【17:35 Update】

The magnitude 6.9 earthquake in Hualien in Taiwan, why is there a high -rise building in Zhejiang, but the ground has no feeling?

The earthquake is coming, what about high -rise residents?

This afternoon, many friends in Zhejiang reported that Lou was shaking, is it an earthquake?

Indeed, according to the China Earthquake Network, at 14:44 pm today, a magnitude 6.9 earthquake occurred in Hualien County, Hualien County, Taiwan (23.15 degrees north latitude, and 121.30 degrees east longitude), with a depth of 10 kilometers. The earthquake is located in Hualien County, about 541 kilometers from Wenzhou City in our province, and about 794 kilometers in Hangzhou. At the time of the earthquake, Wenzhou, Taizhou, Ningbo, Hangzhou, Jiaxing, Lishui and other regions in our province all had earthquake reports. The 6.5 magnitude earthquake from Taitung County, Taiwan on September 17, was 14 kilometers away from the earthquake.

Why is the Taiwan earthquake frequently? According to experts from Zhejiang Earthquake Administration, Taiwan Island is located at the junction of the Eurasian sector and the Pacific sector. Seismic, the island is broken and dense. So far, there are 33 proven activity faults. Earthquakes are frequent, especially in the eastern earthquake activities of Taiwan than western Taiwan. Since the records, nearly 300 magnitude 6 to 6.9 earthquakes occurred in Taiwan and the surrounding waters, with more than 40 magnitude 7-7.9 earthquakes, and magnitude 8 or more earthquakes.

The faults of the eastern part of Taiwan are strong. The breaks are mainly distributed on both sides of the Huadong Ridge Valley and the Ridge Valley. The Handong Ridge Valley is the collision junction of the Eurasian and the Pacific plates. Due to the squeezing each other in the two sections, the earthquake activities are very frequent. A magnitude 6 to 6.9 earthquake occurred more than 200 times, and more than 30 magnitude 7 to 7.9 earthquakes. The magnitude 8 or more occurred in the eastern part of Taiwan.

The fracture of western Taiwan is mainly located in the Taiwan West Plain. The earthquake movement is weaker than in the eastern part of Taiwan. A magnitude 6 to 6.9 earthquake occurred in nearly a hundred times, and a magnitude 7-7.9 earthquake. A magnitude 7.6 earthquake in Jiji Town, Nantou County, Taiwan on September 21, 1999 was an earthquake caused by the Canpu Fracture activity in western Taiwan.

Some netizens asked, why is there a high -rise building in the Taiwan earthquake, but the ground does not feel the ground?

It is understood that this is because the seismic waves generated during the earthquake have passed through long distances, and its high -frequency component (short cycle wave) has gradually decreased. When reaching Hangzhou, the earthquake waves are mainly low -frequency wave (long cycle), and the wavelengths are long. The higher the floor, the more the vibration cycle of the building will be similar to the cycle of these earthquake waves. The resonance phenomenon occurs, and the vibration will be obvious.

In addition, because the foundation foundation in Hangzhou is mainly deep and soft, it has a significant amplification effect on the earthquake waves. As soon as the earthquake, the high -rise building with a self -containing cycle of the vibration cycle is easy to resonate with the long -term earthquake waves that have been softened. Even if the magnitude of the earthquake is small or the epicenter distance is far away, it can cause a strong earthquake reaction of high -rise buildings on the venue. Therefore, the Taiwan earthquake, Hangzhou, 800 kilometers, has a clear sense of earthquake.

But don't worry, high -rise buildings have strictly enforced earthquake resistance standards and have strong earthquake resistance. Therefore, when earthquakes occur, if you live in high -rise, do not rush to run out. Do not rush to run out. Prevent chandeliers, vases, high cabinets and other pendants, and then evacuate and evacuate after the earthquake.

【16:02 update】

"Did the earthquake again?"

"It's dizzy."

"The lamp is so powerful! It feels obvious this time."

Just now, Ningbo netizens reported that they felt the earthquake, and the earthquake was obvious.

宁波市地震监测预报中心发布消息：中国地震台网正式测定，2022年09 At 14:44 on the 18th, a magnitude 6.9 earthquake occurred in Hualien County, Taiwan (121.30 degrees east longitude, 23.15 degrees north latitude), with a depth of 10.00 kilometers.

Relevant experts from the Earthquake Monitoring Center of the Ningbo Emergency Administration said that some high -rise buildings in Ningbo in Taiwan have a sense of earthquake, but there is no harm to Ningbo. Citizens do not have to panic.

In addition, experts also reminded that in the case of similar situations, citizens must calm down, and it is recommended that everyone retreat first. Select the inner side of the load -bearing wall or a small place to avoid it. Remember not to hide on the side of the outer wall of the window. After the earthquake is evacuated, you must walk the stairs without choosing an elevator when you evacuate. In addition, do not panic when you encounter earthquakes. Remember to close the power and gas switch at home to prevent secondary disasters caused by it.

【Update before 15:00】

According to the formal determination of the China Earthquake Network: At 14:44 on September 18th, a magnitude 6.9 earthquake occurred in Hualien County, Hualien, Taiwan (23.15 degrees north latitude, 121.30 degrees east longitude), and the depth of the earthquake was 10 kilometers.

Netizens in many places in Zhejiang in Hangzhou, Ningbo, Wenzhou and other places said that the sense of shock was strong.

Report the netizen under the Weibo on the@在 在 网 网 to the netizen under the Weibo

Many netizens posted Weibo that they felt the sense of shock. Netizens who live in 18 floors, "The 18th floor has a strong sense of shock, and goes downstairs immediately."

Mr. Qin, Hangzhou, also took a video of the shaking of the lights at home: "Hangzhou just felt very strong, and I dazzled my head on the top of the building."

It is understood that the Taiwan Meteorological Department stated on the 18th that the preliminary judgment of Taiwan's strong earthquake was caused by the squeezing of the faults under the central mountains.

According to current statistics, the frequency of aftershocks occur, but there will be a strong aftershocks occur, and a strong aftershocks will occur, and the aftershocks above level 3 may last for one month.

【Earlier News】

The 5.7 magnitude earthquake in Taitung, Taiwan, Zhejiang netizens have a sense of earthquake again: I fainted again

The Chinese Earthquake Network officially determined: At 13:19 on September 18th, a magnitude 5.7 earthquake occurred in Taitung County, Taiwan (23.09 degrees north latitude, 121.27 degrees east longitude), and the depth of the earthquake was 12 kilometers.

The official Weibo of the Zhejiang Earthquake Bureau also released a message-

Ms. Yang, Hangzhou, lived in Binjiang and gave hours news reports: I felt shaking at home.

Under the Weibo of the China Earthquake Network, there are a lot of netizens who feel the sense of shock.

Under the official Weibo of the Zhejiang Earthquake Bureau, some people also commented: Taizhou's high -floors have obvious earthquakes.

Some netizens in Hangzhou said, "Hangzhou was shaking again! No wonder I was faint again, especially a netizen who lived in the 19th floor said that the sense of shock was a bit obvious and" dizzy. "

Mr. Shi lived on the 13th floor of the Jiubao No.1 Community in Hangzhou. The earthquake last night and the earthquake just now were shaking.Mr. Shi said that people do n’t have much feeling and dizziness, but the lights at home are very “sensitive” and “the lamp is very obvious”.Did you feel it?

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