کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9522674 | 1634961 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Directivity and apparent velocity of the coseismic ionospheric disturbances observed with a dense GPS array
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
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![عکس صفحه اول مقاله: Directivity and apparent velocity of the coseismic ionospheric disturbances observed with a dense GPS array Directivity and apparent velocity of the coseismic ionospheric disturbances observed with a dense GPS array](/preview/png/9522674.png)
چکیده انگلیسی
Coseismic disturbances in ionosphere have been observed after recent thrust earthquakes off the Pacific coast of Japan, with a dense Global Positioning System array. Positive pulses in electron content, as large as several times 1015 electrons/m2 and as long as 4-5 min, emerge â¼Â 10 min after earthquakes and propagate horizontally with apparent velocity of â¼Â 1 km/s, close to the sound velocity at the ionospheric height. They may have been excited by coseismic uplifts of the sea surface initially as upward propagating compressive pulses of atmosphere, which were gradually refracted to propagate horizontally in ionosphere. The propagation has strong north-south asymmetry, and interaction between the movements of charged particles in acoustic waves and geomagnetic fields might have selectively attenuated the northward propagating disturbances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 236, Issues 3â4, 15 August 2005, Pages 845-855
Journal: Earth and Planetary Science Letters - Volume 236, Issues 3â4, 15 August 2005, Pages 845-855
نویسندگان
Kosuke Heki, Jinsong Ping,