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
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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
Journal: Earth and Planetary Science Letters - Volume 449, 1 September 2016, Pages 155-163
نویسندگان
Dun Wang, Nozomu Takeuchi, Hitoshi Kawakatsu, Jim Mori,