average tephra accumulation for 30 minutes of eruption representing the period between 4-8 May 2010 easting UTM northing UTM elev. kg/m2 7047225.11520 586139.90257 660 0.36 7056273.34282 570320.82681 1414 1.26 7053550.49350 577502.66193 835 0.21 7048387.32438 586818.34836 766 0.01 7043239.99388 623571.94926 30 0.04 7040897.14371 621170.17165 30 0.07 7036215.26954 607458.94769 39 0.09 7036873.02728 592653.89702 52 0.04 7042674.29948 583616.14148 113 0.19 7049884.96456 576794.79189 521 0.19 7043917.71768 580477.20036 94 0.22