Monitoring of debris flowing in the ocean generated by huge tsunami caused by 2011 earthquake off the Pacific coast of Tohoku

Takashi Aoyama

doi:10.1117/12.977372

21 November 2012 Monitoring of debris flowing in the ocean generated by huge tsunami caused by 2011 earthquake off the Pacific coast of Tohoku

Takashi Aoyama

Author Affiliations +

Proceedings Volume 8525, Remote Sensing of the Marine Environment II; 852513 (2012) https://doi.org/10.1117/12.977372
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

The 2011 off the Pacific coast of Tohoku earthquake (Mw = 9) was one of the most devastating earthquakes in Japanese history. The extremely large and widespread tsunami it generated caused a large amount of debris to flow into the Pacific Ocean. It is important to understand debris flow in the ocean for both environmental research and international relations. In this study, tsunami debris was monitored by satellite remote sensing. As a first step, we propose a method for identifying debris floating on turbid sea areas through thin clouds using two-dimensional scatter diagrams for MODIS spectral bands. Characteristic regions in the images are effectively separated by using the scatter diagram to identify six regions (land, coastal areas, debris, cloud, turbid sea, and clear sea). We report initial results of monitoring debris floating in the Pacific Ocean.

Citation Download Citation

Takashi Aoyama "Monitoring of debris flowing in the ocean generated by huge tsunami caused by 2011 earthquake off the Pacific coast of Tohoku", Proc. SPIE 8525, Remote Sensing of the Marine Environment II, 852513 (21 November 2012); https://doi.org/10.1117/12.977372

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