Most popular, they listen to the pulse of the eart

2022-09-23
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They "listen" to the earth's pulse. A variety of instruments around Hefei monitor the "wind and grass movement" of the earth's crust for 24 hours. Down the earth's surface, the earth's crust may be changing where we can't see it. Will these changes be precursors of earthquakes? In the scorching summer, more than 20 sets of seismic observation equipment at Hefei seismic station are listening for us and recording the wind and grass movements in the earth's crust for 24 hours

seismometer makes ECG for the earth's crust

in the afternoon of July 19, in the hall of Hefei seismic station located in Zipeng Mountain, the seismic waveform on the large screen looks quite like the ECG of the hospital. At the moment, it is walking calmly. But in the eyes of seismologists, they are far more complex than ECG. The beating waveform reveals the secrets of the depths of the earth

zhushengshui, deputy director of Anhui Hefei seismic station, introduced that the seismic wave information monitored by the data processing system of the station hall came from various monitoring stations. Each station is equipped with a seismometer to feel the vibration after the earthquake. After collecting the data, it is transmitted to the seismic station through conversion, transmission and other steps for earthquake quick report and various analysis

in an earthquake swing room in the basement of Hefei seismic station, a silver metal box is firmly fixed on the swing pier. No wonder some people say that what is placed in the box is a seismometer. With the help of concrete, it is integrated with the rock about two meters underground. Ge Jihua, director of the monitoring and prediction Office of Hefei seismological station, said that after the earthquake, the seismic waves spread through the underground rocks and can be accurately sensed and recorded by seismometers

According to ge Jihua, according to the geological conditions of the area where the measuring point is located and the characteristics of the seismometer, the selection of the range of seismometer instruments and equipment can be buried at different depths below the surface

listen to the earth's pulse 108 meters underground

there is not only a seismometer. Zhu Shengshui introduced that Anhui Hefei Seismostation governs Hefei deformation station, zipengshan Seismostation and Dashushan Seismostation. It is the only seismic monitoring station in our province that operates according to the central station mode. At present, the monitoring covers 9 measurement items and more than 20 sets of observation equipment, and it is one of the most comprehensive observation stations in our province

at present, Hefei seismic station is using observation means such as ground resistivity, borehole volume strain, underground electromagnetic wave, sand layer strain, surface earthquake, underground earthquake, strong motion observation, etc. Zhu Shengshui introduced that different observation methods need to use different observation instruments, with the purpose of monitoring subtle changes in the earth's crust and providing basic data for earthquake prediction and early warning. In order to reduce interference, these monitoring instruments are basically deployed in different depths away from the city

beside the fence of Hefei seismic station, the mark of a borehole strain observation point of Anhui zipengshan seismic station looks inconspicuous. The probe of the component borehole strain gauge is buried 108 meters below the mark

47 meters underground to monitor the Tanlu fault zone

in order to closely monitor the changes of the Tanlu fault zone, near the Hefei deformation station, the seismic Department buried a short leveling monitoring line across the main fault of the Tancheng Lujiang River, which is also the southernmost of a series of short leveling lines laid by the China Earthquake Administration along the Tanlu fault zone. The so-called cross fault short leveling observation is to measure the height difference between the upper and lower walls of the fault with a level gauge and a level ruler. Advanced non-ferrous materials used in the fields of rail transit, aerospace and power electronics are judged through the data. 2. The current situation and development trend of foreign biomedical material industry and technology, and the activity of the fault layer. In order to measure the data, the observers need to place multiple monuments underground. On the Feidong survey line, the deepest bedrock marker is 47 meters deep

zhushengshui, deputy director of Hefei seismic station in Anhui Province, said that in earthquake monitoring, in order to ensure the accurate, timely, continuous and reliable output of various monitoring data, the staff of the seismic station are all 24-hour rotation, which is a veritable night watchman

Anhui business daily financial media Liu Yuanyuan correspondent Wu Wenwen intern Zhang Yanling/Wen Liu Zhiwei/photo

- background

the Tanlu fault zone extends more than 2400 kilometers in China. In human history, many large earthquakes have occurred along this fault zone. The Tanlu fault zone is also a fault zone that has been monitored by China's seismic system for a long time. Hefei deformation Observatory under the jurisdiction of Hefei seismic station is a seismic deformation observation station deployed by the State Seismological Bureau along the Tan Lu fault zone in 1982

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