کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8911426 | 1638274 | 2018 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Using infrasound waves to monitor tropospheric weather and crater morphology changes at Volcán Tungurahua, Ecuador
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Using infrasound waves to monitor tropospheric weather and crater morphology changes at Volcán Tungurahua, Ecuador Using infrasound waves to monitor tropospheric weather and crater morphology changes at Volcán Tungurahua, Ecuador](/preview/png/8911426.png)
چکیده انگلیسی
We use infrasound waves generated during eruptions of Volcán Tungurahua (Ecuador) to study both, changing atmospheric conditions and volcanic source characteristics. Analyzed infrasound data were recorded for a 32-month period by a five-station network located within 6.5Â km from the vent. We use cross-network correlation to quantify the recurrent eruptive behavior of Tungurahua and results are corroborated by reports from the Ecuadorian monitoring agency. Cross-network lag times vary over short time periods (minutes to days) when vent location is stable and attribute these variations to changes in atmospheric structure. Assuming a fixed source location, we invert for average air temperatures and winds in Tungurahua's vicinity (<Â 6.5Â km) and find evidence for diurnal and semidiurnal tropospheric tides. We also use cross-network correlation lag times to compute infrasound source positions with resolutions of ~Â 11.6Â m, taking into account coarse NOAA atmospheric models for local winds and temperatures. Variable infrasound-derived source locations suggest source migration during the 32Â months of analyzed data. Such source position variability is expected following energetic eruptions that destructively altered the crater/vent morphology as confirmed by imagery obtained during regular overflights.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Volcanology and Geothermal Research - Volume 349, 1 January 2018, Pages 205-216
Journal: Journal of Volcanology and Geothermal Research - Volume 349, 1 January 2018, Pages 205-216
نویسندگان
Hugo D. Ortiz, Jeffrey B. Johnson, Patricio G. Ramón, Mario C. Ruiz,