SNR changes of VLF radio signals detected onboard the DEMETER satellite and their possible relationship to the Wenchuan earthquake

作者：He YuFei; Yang DongMei^*; Chen HuaRan; Qian JiaDong; Zhu Rong; Parrot M

来源：Science in China - Series D: Earth Sciences , 2009, 52(6): 754-763.

DOI：10.1007/s11430-009-0064-5

• SNR
• VLF
• Wenchuan earthquake
• DEMETER satellite
• seismo-ionospheric phenomenon

Here we used the VLF signal data received by the DEMETER satellite, transmitted from various ground VLF transmitters which are located around China, to study the changes in the signal to noise ratio (SNR) before and after the Wenchuan earthquake, which had a magnitude of 8.0. We also found that the SNRs of different frequency signals decreased significantly over the epicenter region before the earthquake, and reverted to their original levels after the earthquake. This phenomenon may be related to the earthquake.

• 出版日期2009-6
• 单位中国地震局地震预测研究所