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. 2020 May 19;11:2503. doi: 10.1038/s41467-020-16171-2

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Map of Sumatra with division into provinces. The two most northern provinces (Aceh and North Sumatra) are additionally divided at the mountain range into a northern and southern part. a Average 5-day precipitation accumulation [mm] based on TRMM satellite-derived estimates. b Sumatra's topography [m]. c The spatial distribution of flood data sources from the Papers (squares) and Twitter (circles) in all of Sumatra's provinces between 2014 and 2018. Size of a circle represents the number of records at individual location. Each color shows one province.