This satellite photograph of New Zealand shows the plume of ash from the Ruapehu eruption of 17 June 1996 extending for hundreds of kilometres north-north-east of the vent. Where it drifts depends on wind direction. The end result, over hundreds of years, is that a dusting of volcanic ash has been added to the topsoil and enhanced its fertility.
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marie (not verified)
10 October 2011
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