We showed that with an increasing tephra load, voltage decreases linearly whereas current displays an exponentially decreasing trend.
We also found a strong grain size dependency, with finer particles causing a much more drastic decrease as coarser particles with the same tephra load.
The three curves represent the area with a probability greater than 5%% of exceeding a tephra load of 300, 500 and 1000 kg/m2, respectively.
New capabilities of this implementation include the ability to calculate hazard curves which describe the distribution of the exceedance probability as a function of intensity (e.g., tephra load) on a grid of points covering the target area.
Tephra loads on the vents inhibited opening and therefore aeration.
Moreover, we compared also the hazard area for tephra loading equal to 500 and 1000 kg/m2.
As a final remark, concerning the tephra loading, we need to consider the potential effect of rain.
Simulations show that there are some particles sizes that give a greater contribution on tephra loading in the target area.
During this relatively short eruption, these thicknesses were not exceeded in populated areas and only some lightly constructed, long-span livestock shelters and barns in Miike, proximal to the volcano (50 100 kg/m2 tephra accumulation), suffered structural damage due to tephra loading.
However, these results demonstrate clearly that there are some particles sizes that give a greater contribution on tephra loading in the target area.
