Volcanoes can produce far-reaching hazards that extend distances of tens or hundreds of kilometres in large eruptions, or in certain conditions for smaller eruptions.
However, even relatively small eruptions can have global economic ramifications, as illustrated by the M4 2010 Eyjafjallajökull eruption which created mass disruption across Europe by grounding air travel.
[They come] even for small indications.
Still, even a small eruption could increase base melting and lubricate the ice sheet.
You'd have to have a huge, huge eruption". Still, even a small eruption could increase base melting and lubricate the ice sheet.
Some reinsurers, though, are beginning to put that right.One worry is that even quite a small eruption could cost a lot if it hit a built-up part of a developed country.
Only the largest eruptions could melt all the ice above them and poke through to the surface, but even smaller eruptions could potentially cause global sea level to rise, although no one knows how big the rise might be.
VE#1 VE#3 stand for vulcanian eruptions, E#4 E 5 for small-scale eruptions, and T#1 T 19 for ground tilt events that are likely to represent aborted or overlooked eruptions.
Photo: For three weeks, small eruptions at Colima Volcano, in the background, have spewed ash over several towns in the area, 430 miles west of Mexico City, raising fears of an eruption like the devastating one in 1913.
Therefore, Hayakawa's single isopach method is not suitable for small-scale eruptions.
