Natural Earthquake Monitoring Application
HiFi-DAS equipment uses linear frequency-swept detection light, with its spatial resolution determined by the frequency-sweep range, independent of the detection pulse duration (based on OFDR principle). It can simultaneously achieve high spatial resolution and long-distance detection. Therefore, the HiFi-DAS system has significant performance advantages in seismic wave monitoring applications, enabling multi-channel monitoring of both P-waves and S-waves.
Figure1：The M6.2 earthquake recorded by HiFi-DAS in Heyuan, Guangdong in 2024 in the Hualien sea area, Taiwan
Figure2：HiFi-DAS recorded local earthquake waveforms in Mianyang, Sichuan in 2024 (unrated by seismic network)
Figure3：The South China Sea submarine cable detected a 6.9-magnitude earthquake in Menyuan County, Qinghai in 2022.
Figure4：Mobile communication optical fiber cables in Hangzhou detected a 6.1 magnitude earthquake in Hualien, Taiwan in 2024.
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