کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4721582 | 1639391 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Co-seismic geoelectrical potential changes associated with the June 4, 2000's earthquake (Mw7.9) in Bengkulu, Indonesia
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
Significant geoelectric and magnetic field anomalous changes have been observed prior to and during the Mw7.9 of June 4, 2000 Bengkulu earthquake in the southern Sumatran plate boundary, Indonesia. The mainshock occurred in the intra-oceanic slab and triggered the aftershocks that mainly occurred in the subduction interface of Sumatra Island at a distance of about 220Â km from our monitoring sites. We obtained a set of electric and magnetic data for a couple of hours before, during and after the mainshock. Changes of electric field of about 5-10Â mV/100Â m and magnetic field of about 40Â pT were observed at all monitoring sites at about 90Â min before the mainshock. These anomalous signals occurred at the same time as the global geomagnetic storm that was clearly observed at Biak, Alice Springs and Kakadu Geomagnetic Observatories. A monitoring instrument located at the so-called sensitive site recorded a remarkable change of geoelectric potential of up to 140Â mV/100Â m at about 40Â s after the origin time of the mainshock. These co-seismic anomalous signals occurred coincidently with the arrival of seismic P-wave. We interpret these signal changes in terms of the electrokinetic effect associated with seismic wave propagation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics and Chemistry of the Earth, Parts A/B/C - Volume 34, Issues 6â7, 2009, Pages 373-379
Journal: Physics and Chemistry of the Earth, Parts A/B/C - Volume 34, Issues 6â7, 2009, Pages 373-379
نویسندگان
Djedi S. Widarto, Toru Mogi, Yoshikazu Tanaka, Toshiyasu Nagao, Katsumi Hattori, Seiya Uyeda,