Fiber optic cables underground are actually very sensitive. They can be tagged from earthquakes, explosions, and even vibrations from cars passing over them. These vibrations put pressure on the fiber optic cables. stretching and contraction of fibers why is this happening. this too the passage of light through the cable, the amount of distance it travels It changes precisely.
Distributed acoustic sensing These changes, measured with a technique called (DAS), reveal how and where pulsating waves move underground. This information is used in terms of earthquake damage. identifying the areas most at risk It is stated that it may help. This is Istanbul in construction and urban planning can make it easier to set priorities. The aim is to determine the resonance of the soil and therefore its response during an earthquake with the data obtained from these systems. This will enable the identification of the currently most risky areas and provide insight into where, under what conditions and with what requirements new construction should be carried out. In the new study, DAS, First time in Istanbul tested.
As it is known, Istanbul is located just north of the Marmara Sea and the North Anatolian Fault. Seismologists agree that a major earthquake on the extension of the North Anatolian Fault in the Sea of Marmara is overdue. So the real question is not if an earthquake will happen, but when it will happen and how best to prepare.
It is reported that fibers are a critical and primary part of this preparation. There are fiber cables almost everywhere under Istanbul. One of these fibers belonging to Istanbul Metropolitan Municipality follows the coastline along the Marmara Sea on the Anatolian side of the city and connects the security cameras in various parks.
The sensitivity of the DAS system is intriguing. The research team underlines that they clearly recorded a small explosion in the meter project with this system. Even February 6, 2023that shook the south of Turkey in Kahramanmaraş It is also noted that the seismic waves scattered from the earthquakes reached 8 kilometers of fiber and were recorded by DAS systems.
However, DAS records are so far represent the pilot project does; These 8 kilometers of fiber constitute a small part of the telecommunications infrastructure that exists under Istanbul. However, the data collected is used to develop a model of underground geology. This model is then used in computer simulations to predict future will be used to predict how the ground will shake in earthquakes.
If the project is successful, the aim is to spread the system throughout the city and improve hazard predictions through collaborations. The study states that expanding the fiber-optic cable network used for DAS in Istanbul could revolutionize both earthquake monitoring and underground geological characterization.
Of course, there are differences between a small DAS system and city-wide DAS. The biggest difference here is not the operation of the system, but the processing of the collected data. Large-scale DAS systems can easily generate petabytes of data per year, all of which needs to be analyzed in real time or stored for later analysis. Machine learning could be a tool to help with such data volumes, but the fact that every city and every fiber route is different makes standardization difficult.
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Source link: https://www.donanimhaber.com/istanbul-depremine-fiber-optik-kablolar-ile-hazirlanmak–177898
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