Figure 5

Histograms showing lava flow thickness, volume, and log(volume). Histograms showing the ranges of observed and simulated lava flow thickness, volume, and log(volume). Black bins characterize 15 observed lava flows. Flow thickness follows a normal distribution and volume follows a log-normal distribution. These field observations are summarized in Table 1. Red bins characterize 10 000 flow thicknesses, randomly selected from a truncated normal distribution with a mean of 7 and a standard deviation of 3, truncated above 4 m and below 15 m. Similarly, flow volumes, were generated by random selection of their logarithms from a truncated normal distribution with a mean of 7.2 and a standard deviation of 0.5, truncated above 6 and below 9 (Table 3). These plots show that the distributions chosen for the Monte Carlo simulation reasonably match the range of observed values.