The project has also seen glass beads tipped down aerated ramps into water to mimic what happened when pyroclastic flows hurtled down the sides of erupting volcanoes. Big underwater shakes are responsible for most of the tsunamis that reach New Zealand shores. While our tsunami hazard planning focuses mostly on earthquake-generated tsunamis, large waves generated from volcanic activity did happen — and they could prove every bit as destructive.
Perhaps the most famous case was 's Krakatoa eruption, which generated multiple large tsunamis that killed more than 36, people. More recently, a eruption near the northern shore of Russia's Lake Karymskoye created waves up to 30m high, and more than people died in a tsunami when the flank of Indonesia's Anak Krakatoa collapsed in By: Jamie Morton.
Auckland straddles a field of more than 50 volcanoes. Research explores impacts of hypothetical volcanic eruption in Auckland Understanding the possible impacts of a volcanic eruption in Auckland is one of the first steps in preparing the city to survive and even thrive after such an event, scientists said today. In a research paper released this week, scientists have looked extensively at what could happen during an eruption in Auckland, and revealed that critical infrastructure can still provide some services in the face of extreme conditions.
The study is based on a hypothetical two-month-long unrest and eruption sequence near Mangere Bridge and explores the implications for evacuation and the impact on critical infrastructure such as water, electricity, and transport.
As well as looking at how evacuations might be managed, there is a focus on how electricity networks would cope with an eruption. The paper is the first complete eruption scenario developed for Auckland since the s and it updates and expands earlier work by scientists in this area. It also represents a new approach of looking beyond direct physical damage to assessing a range of consequences.
Another co-author, Massey University's Professor Mark Bebbington, said the new study could lead to more work in two main areas. One was expanding the range of possible scenarios to approach a fully probabilistic assessment, rather than the "pseudo-probabilistic" evaluation the team made. He also saw potential to apply the team's new method to other volcanic zones around New Zealand and overseas.
The new study has been published in the Journal of Volcanology and Geothermal Research. By: Jamie Morton. There are many variables to consider, some less controllable than others, and the study has considered these. More from Earth Sciences. Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page.
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