Implications for the thermal regime of acoustic noise measurements in Crater Lake, Mount Ruapehu, New Zealand

1994 ◽  
Vol 56 (6-7) ◽  
pp. 493-501 ◽  
Author(s):  
J. Vandemeulebrouck ◽  
A. W. Hurst ◽  
N. Poussielgue
Keyword(s):  
New Zealand ◽  
Thermal Regime ◽  
Crater Lake ◽  
Acoustic Noise ◽  
Mount Ruapehu ◽  
Noise Measurements

Resistivity monitoring of the tephra barrier at Crater Lake, Mount Ruapehu, New Zealand

2011 ◽  
Vol 73 (3) ◽  
pp. 243-250 ◽  
Author(s):  
G. Turner ◽  
M. Ingham ◽  
H. Bibby ◽  
H. Keys
Keyword(s):  
New Zealand ◽  
Crater Lake ◽  
Mount Ruapehu

Fragmentation of steaming Surtseyan bombs

2020 ◽  
Author(s):  
Mark McGuinness ◽  
Emma Greenbank
Keyword(s):  
Mathematical Model ◽  
New Zealand ◽  
Volcanic Eruption ◽  
Crater Lake ◽  
Asymptotic Solutions ◽  
Maximum Pressure ◽  
Ejection Process ◽  
Mount Ruapehu ◽  
Fluid Properties

<p>A Surtseyan volcanic eruption involves a bulk interaction between water and hot magma, mediated by the return of ejected ash. Surtsey Island, off the coast of Iceland, was born during such an eruption process in the 1940s. Mount Ruapehu in New Zealand also undergoes Surtseyan eruptions, due to its crater lake. </p><p>One feature of such eruptions is ejected lava bombs, trailing steam, with evidence that watery slurry was trapped inside them during the ejection process. Simple calculations indicate that the pressures developed due to boiling inside such a bomb should shatter it. Yet intact bombs are routinely discovered in debris piles. In an attempt to crack this problem, and provide a criterion for fragmentation of Surtseyan bombs, a transient mathematical model of the flashing of water to steam inside one of these hot erupted lava balls is developed, with a particular focus on the maximum pressure attained, and how it depends on magma and fluid properties. Numerical and asymptotic solutions provide some answers for volcanologists.</p>

scholarly journals Mount Ruapehu, New Zealand: Observations on its Crater Lake and Glaciers

1955 ◽  
Vol 2 (18) ◽  
pp. 601-605 ◽  
Author(s):  
N. E. Odell
Keyword(s):  
New Zealand ◽  
Crater Lake ◽  
Eruptive Activity ◽  
The Past ◽  
The North ◽  
Mount Ruapehu ◽  
Past Summer

AbstractMt. Ruapehu, the highest summit in the North Island of New Zealand, is a semi-dormant volcano, whose crater lake was responsible for the flood that caused the disastrous railway accident on Christmas Eve, 1953. Since the last eruption of 1945, when mostly ash was ejected, the crater lake that subsequently formed has been contained by a barrier partly composed of lava and partly of névé and ash. It was the breaking through of the latter weaker portion of the dam that was responsible for the flood of mud and boulders which descended via the Whangaehu Glacier and struck the railway 25 miles (40 km.) distant. There is no evidence of eruptive activity having been the cause of the outbreak. During three ascents of the mountain, observations were made of the glaciers, which have been in a state of gradual shrinkage over a number of years. But during the past Summer—a season of exceptional dryness—the process of ablation and wastage has been greatly accelerated, so that immense areas of rock and ash have freshly emerged, and crevasses and dirt-ridges have taken the place of smooth névé or glacier surfaces.

Coupled fluid dynamics-sediment transport modelling of a Crater Lake break-out lahar: Mt. Ruapehu, New Zealand

2010 ◽  
Vol 388 (3-4) ◽  
pp. 399-413 ◽  
Author(s):  
Jonathan L. Carrivick ◽  
Vern Manville ◽  
Alison Graettinger ◽  
Shane J. Cronin
Keyword(s):  
Fluid Dynamics ◽  
New Zealand ◽  
Sediment Transport ◽  
Crater Lake ◽  
Transport Modelling ◽  
Sediment Transport Modelling

A magnetotelluric study of Mount Ruapehu volcano, New Zealand

2009 ◽  
Vol 179 (2) ◽  
pp. 887-904 ◽  
Author(s):  
M. R. Ingham ◽  
H. M. Bibby ◽  
W. Heise ◽  
K. A. Jones ◽  
P. Cairns ◽  
...  
Keyword(s):  
New Zealand ◽  
Mount Ruapehu ◽  
Ruapehu Volcano
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