Earthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-0032, Japan.
Sci Rep. 2016 Dec 23;6:39741. doi: 10.1038/srep39741.
An emerging elementary particle imaging technique called muography has increasingly been used to resolve the internal structures of volcanoes with a spatial resolution of less than 100 m. However, land-based muography requires several days at least to acquire satisfactory image contrast and thus, it has not been a practical tool to diagnose the erupting volcano in a real time manner. To address this issue, airborne muography was implemented for the first time, targeting Heisei-Shinzan lava dome of Unzen volcano, Japan. Obtained in 2.5 hours, the resultant image clearly showed the density contrast inside the dome, which is essential information to predict the magnitude of the dome collapse. Since airborne muography is not restricted by topographic conditions for apparatus placements, we anticipate that the technique is applicable to creating images of this type of lava dome evolution from various angles in real time.
一种新兴的基本粒子成像技术，称为μ 射线层析成像技术，已经越来越多地被用于以小于 100m 的空间分辨率解析火山的内部结构。然而，陆基μ射线层析成像技术至少需要数天的时间才能获得令人满意的图像对比度，因此，它并不是一种实时诊断喷发火山的实用工具。为了解决这个问题，首次实施了航空μ射线层析成像技术，以日本云仙新山火山的平成新山熔岩穹顶为目标。在 2.5 小时内获得的结果图像清晰地显示了穹顶内部的密度对比，这是预测穹顶崩塌规模的重要信息。由于航空μ射线层析成像不受仪器放置地形条件的限制，我们预计该技术适用于实时从各个角度创建此类熔岩穹顶演化的图像。
