Shanghai Shakes as Taiwan Earthquake Rumbles: Expert Analysis on Seismic Impact and Safety Protocols

Tremors in Shangh Felt from Twan Earthquake: Expert Insights

On the morning of April 3rd, residents of Shangh experienced noticeable shaking as a result of an earthquake that occurred off Hualien County, Twan. The China Earthquake Networks Centre reported the magnitude at 7.3 on the Richter scale, with its epicenter located approximately at latitudes 23.81 north and longitudes 121.74 east at a depth of 12 km.

The Shangh Seismological Bureau confirmed that this earthquake was situated roughly 825 kilometers from People's Square in Shangh; consequently, many high-rise buildings across Fujian, Zhejiang provinces, and even within Shangh experienced the tremors. Although Twan earthquakes pose certn risks to tall structures, they are not considered a serious threat to the city.

So why did residents of Shangh feel such vibrations from an earthquake so far away? And how should they respond when experiencing these tremors? Furthermore, what potential effects might this Twanese earthquake have on Shangh?

In an interview with ThePaper.cn, Senior Engineer Wen Yanlin from the Shangh Seismological Bureau provided insights into these questions.

Soft Soil in Shangh Amplifies Earthquake Shocks

Wen explned that due to historical records showing earthquakes of magnitude 6 or above originating from Twan can result in noticeable shaking within tall buildings in Shangh. Considering the larger scale and wider impact area of this particular earthquake, it was expected that a significant portion of Shangh's high-rise buildings would experience noticeable tremors.

Many reported feeling furniture swaying, objects jostling about, and even experienced intense sensations when their buildings shook. This phenomenon is attributed to Shangh's soft soil, with layers exting up to 300-400 meters deep, which amplifies long-period seismic waves from distant earthquakes like Twan's. Resonance occurs when the natural frequencies of these tall buildings align with such waves, intensifying the sway.

Twan earthquakes are not isolated cases affecting Shangh. Wen shared a personal experience during the 2008 Wenchuan earthquake and agn in 2011 following Japan's Great East Earthquake, where many office workers evacuated from the Lujiazui area due to intense tremors.

Upon feeling the shaking in our building, everyone rushed downstrs fearing for safety. I had to desc over twenty floors just that morning, shared Ms. Wang, a Shangh resident describing the experience earlier today.

Is it appropriate to rush out of tall buildings during earthquake tremors?

Wen stressed that when residents feel tremors within high-rise structures, finding refuge in nearby confined spaces like bathrooms is advisable. Rushing downstrs can result in injuries from falling objects and debris. It's best to wt until the shaking subsides before evacuating orderly.

Newly constructed buildings adhere strictly to Shangh's seismic design standards of at least a 7-degree resilience level. Thus, strong earthquakes occurring afar are unlikely to cause significant damage or collapse.

As of noon today, there have been over twenty aftershocks measuring above 4.0 off the coast of Hualien County with magnitudes reaching up to 6. If an aftershock surpasses magnitude 6 occurs in Twan's offshore waters, some tall buildings may experience tremors but are unlikely to sustn damaging effects.

According to data from the Shangh Seismological Bureau, since January 1970, there have been no notable earthquakes on land within Shangh’s jurisdiction. The largest earthquake recorded near the mouth of the Yangtze River was a magnitude 4.9 in 1971. Consequently, Shangh's current seismic activity level is considered relatively low.

We will take advantage of this situation and National Disaster Prevention Day on May 12th to educate residents about earthquake prevention measures, Wen sd. The only way to protect oneself during an earthquake is through the acquisition of essential skills.

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