کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8915472 | 1641101 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Insight into large-scale topography on analysis of high-frequency Rayleigh waves
ترجمه فارسی عنوان
بینش توپوگرافی مقیاس بزرگ در تجزیه و تحلیل امواج رالی بالا فرکانس
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کلمات کلیدی
توپوگرافی مقیاس بزرگ، امواج ریلی، پراکندگی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
The dispersion of surface waves could be biased in regions where topography is comparable to the wavelength. We investigate the effects on high-frequency Rayleigh waves propagating in a typical massif model through numerical simulations. High-frequency Rayleigh waves have relatively higher signal-to-noise ratios (SNR) using the Q component in the LQT coordinate system, perpendicular to the local free surface in these topographic models. When sources and stations are located at different sides of the massif, the conventional dispersion image overestimates phase velocities of Rayleigh waves, as much as 25% with topographic height/width ratio (H/r) >Â 0.5. The dispersion perturbation is more distinctive for fundamental modes. Using a two-layer model, the thickness deviation (ÎD/D) may be significant in surface-wave inversion due to the variation of H/r and the thickness of the first layer. These phenomena cannot be ignored in surface-wave interpretations, nevertheless they are trivial for the source and stations located at the same side of the massif.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Applied Geophysics - Volume 150, March 2018, Pages 1-10
Journal: Journal of Applied Geophysics - Volume 150, March 2018, Pages 1-10
نویسندگان
Ping Ping, Risheng Chu, Jiajun Chong, Sidao Ni, Yu Zhang,