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. 2015 Mar 25;10(3):e0120449. doi: 10.1371/journal.pone.0120449

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© 2015 Dobra et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 1 — The three cellular towers (red dots) that were active in January and February 2008 and were located in site 361 recorded higher than usual call volume and movement frequency on February 3, 2008—the day of the Lake Kivu earthquakes. The green cross marks the approximate location of the epicenters of the Lake Kivu earthquakes, and the two green circles mark the 25 and 50 km areas around the epicenters. The location of site 361 is shown in blue, while the locations of the other 84 sites that contained active towers in February 2008 are shown in gray. The Rwandan country borders are also shown in gray.