Fig. 2From: Respiratory health and eruptions of the Nyiragongo and Nyamulagira volcanoes in the Democratic Republic of Congo: a time-series analysisDistribution of the total number of cases of acute respiratory symptoms (ARS), from 1999 to 2010, over the studied area. The isopleths of volcanogenic SO2 concentrations are based on satellite data obtained using the Ozone Monitoring Instrument (OMI) and dominant wind directions [16]Back to article page