Tagged: geology

The temperamental past of Auckland’s Volcanoes - News

Jean Balchin Jul 18, 2017

Two recent studies have found that Auckland’s volcanoes had a rather stormy and temperamental past. At one stage, several large eruptions happened within 4,000 years, whereas at other times there were thousands of years of silence. The two studies were published this month in the Journal of Volcanology and Geothermal Research … Read More

A map that fills a 500-million year gap in Earth’s history - Guest Work

Guest Work Jul 10, 2017

Alan Collins, University of Adelaide and Andrew Merdith, University of Sydney Earth is estimated to be around 4.5 billion years old, with life first appearing around 3 billion years ago. To unravel this incredible history, scientists use a range of different techniques to determine when and where continents moved, how life evolved, how climate changed … Read More

Satellites reveal melting of rocks under volcanic zone - Guest Work

Guest Work Jul 06, 2017

Simon Lamb, Associate Professor in Geophysics, Victoria University of Wellington and Timothy Stern, Professor of Geophysics, Victoria University of Wellington Volcanoes erupt when magma rises through cracks in the Earth’s crust, but the exact processes that lead to the melting of rocks in the Earth’s mantle below are difficult to study. In our paper, published … Read More

Has Everest’s iconic Hillary Step really collapsed? Here’s the science - Guest Work

Guest Work May 29, 2017

By Mike Searle, University of Oxford The Hillary Step, a rocky outcrop at 8,770m, just beneath the summit of Everest (8,850m), has finally succumbed to gravity and partially collapsed. At least it has according to mountaineer Tim Mosedale, who climbed the mountain this year. His claim has been refuted by the chair of the Nepal … Read More

New Zealand’s Alpine Fault reveals extreme underground heat and fluid pressure - Guest Work

Guest Work May 18, 2017

By Rupert Sutherland, Victoria University of Wellington An international team that drilled almost a kilometre deep into New Zealand’s Alpine Fault, which is expected to rupture in a major earthquake in the next decades, has found extremely hot temperatures and high fluid pressures. Our findings, published today in Nature, describe these surprising underground conditions. They have broad … Read More

New Zealand quake study reveals ruptures can be much bigger than we thought possible - Guest Work

Guest Work Mar 27, 2017

By Stephen Hicks, University of Southampton No one could have expected what was to hit New Zealand in 2016. The country is certainly no stranger to being shaken up by moving tectonic plates. Yet on November 14 2016, it was struck by what may be the most complex rupture ever recorded, overshadowing even the highly destructive sequence of … Read More

Kaikoura earthquake – notes from a field geologist - Shaken Not Stirred

Guest Work Jan 09, 2017

In this guest post University of Auckland Geologist Dr Julie Rowland reflects on the 14 November M7.8 Kaikoura earthquake. Let’s be clear – it was huge. When you see houses shunted sideways 10 m or lifted up by 8, you know you are dealing with a big one. The drone imagery and photographs that have been doing the media rounds paint … Read More

What happened in New Zealand’s magnitude 7.5 earthquake - Guest Work

Guest Work Nov 15, 2016

Brendan Duffy, University of Melbourne and Mark Quigley, University of Melbourne At least two people have died in the magnitide 7.5 earthquake that struck New Zealand’s South Island early on Monday, local time. Preliminary modelling suggests that the earthquake was caused by a rupture of a northeast-striking fault that projects to the surface … Read More

NZ Earthquake – international scientists react - News

John Kerr Nov 14, 2016

In the aftermath of this morning’s 7.5-magnitude earthquake there has been a solid effort by researchers and authorities to provide timely information to an understandably worried New Zealand public. The most up-to-date source of information on the situation is GeoNet, which is providing updates on aftershock sequences and likelihood estimates of future scenarios. In the most recent news update on the GeoNet … Read More