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Remote Sens. 2017, 9(2), 138; doi:10.3390/rs9020138

Investigation of Potential Volcanic Risk from Mt. Baekdu by DInSAR Time Series Analysis and Atmospheric Correction

1
Department of Geoinformatics, University of Seoul, Seoulsiripdaero 163, Dongdaemum-gu, Seoul 02504, Korea
2
Department of Land Economics, National Chengchi University, 64, Sec. 2, Zhinan Rd., Wenshan Dist., Taipei 11605, Taiwan
3
National Meteorological Satellite Center, 64-18, Kwanghewon-ri, Juncheon-Gun, Chungchongpukdo 365-831, Korea
4
Department of Environment, Energy and Geoinformatics, Sejong University, 209, Neungdong-ro, Seoul 143-747, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Andrew McGonigle, Salvatore Stramondo and Prasad S. Thenkabail
Received: 29 September 2016 / Revised: 25 January 2017 / Accepted: 26 January 2017 / Published: 7 February 2017
View Full-Text   |   Download PDF [13912 KB, uploaded 7 February 2017]   |  

Abstract

Mt. Baekdu is a volcano near the North Korea-Chinese border that experienced a few destructive eruptions over the course of its history, including the well-known 1702 A.D eruption. However, signals of unrest, including seismic activity, gas emission and intense geothermal activity, have been occurring with increasing frequency over the last few years. Due to its close vicinity to a densely populated area and the high magnitude of historical volcanic eruptions, its potential for destructive volcanic activity has drawn wide public attention. However, direct field surveying in the area is limited due to logistic challenges. In order to compensate for the limited coverage of ground observations, comprehensive measurements using remote sensing techniques are required. Among these techniques, Differential Interferometric SAR (DInSAR) analysis is the most effective method for monitoring surface deformation and is employed in this study. Through advanced atmospheric error correction and time series analysis, the accuracy of the detected displacements was improved. As a result, clear uplift up to 20 mm/year was identified around Mt. Baekdu and was further used to estimate the possible deformation source, which is considered as a consequence of magma and fault interaction. Since the method for tracing deformation was proved feasible, continuous DInSAR monitoring employing upcoming SAR missions and advanced error regulation algorithms will be of great value in monitoring comprehensive surface deformation over Mt. Baekdu and in general world-wide active volcanoes. View Full-Text
Keywords: Mt. Baekdu; ground deformation; differential interferometric SAR; time series analysis; water vapor Mt. Baekdu; ground deformation; differential interferometric SAR; time series analysis; water vapor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kim, J.-R.; Lin, S.-Y.; Yun, H.-W.; Tsai, Y.-L.; Seo, H.-J.; Hong, S.; Choi, Y. Investigation of Potential Volcanic Risk from Mt. Baekdu by DInSAR Time Series Analysis and Atmospheric Correction. Remote Sens. 2017, 9, 138.

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