کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6427378 1634707 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimating high frequency energy radiation of large earthquakes by image deconvolution back-projection
ترجمه فارسی عنوان
برآورد تابش انرژی فرکانس بالا از زلزله های بزرگ به وسیله تصویر پس انداز تصویر
کلمات کلیدی
پشت طرح، آرایه لرزه ای، پرتو انرژی فرکانس بالا، سرعت پارگی فوق العاده
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
High frequency energy radiation of large earthquakes is a key to evaluating shaking damage and is an important source characteristic for understanding rupture dynamics. We developed a new inversion method, Image Deconvolution Back-Projection (IDBP) to retrieve high frequency energy radiation of seismic sources by linear inversion of observed images from a back-projection approach. The observed back-projection image for multiple sources is considered as a convolution of the image of the true radiated energy and the array response for a point source. The array response that spreads energy both in space and time is evaluated by using data of a smaller reference earthquake that can be assumed to be a point source. The synthetic test of the method shows that the spatial and temporal resolution of the source is much better than that for the conventional back-projection method. We applied this new method to the 2001 Mw 7.8 Kunlun earthquake using data recorded by Hi-net in Japan. The new method resolves a sharp image of the high frequency energy radiation with a significant portion of supershear rupture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 449, 1 September 2016, Pages 155-163
نویسندگان
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