Zobrazeno 1 - 10
of 99
pro vyhledávání: '"N. F. Stevens"'
Publikováno v:
Journal of Volcanology and Geothermal Research. 166:125-146
A number of the geothermal systems in the Taupo Volcanic Zone (TVZ), New Zealand, have been utilised on a large scale to provide heat and to generate electricity, in some cases causing areas of localised subsidence. Subsidence monitoring using field-
Autor:
Geoff Wadge, N. F. Stevens
Publikováno v:
Natural Hazards. 33:47-76
Measurement of volcanic surface movement is an operational technique at many volcano observatories to help understand internal processes and to aid in eruption forecasting. The potential of differential radar interferometry (DInSAR) to map patterns o
Publikováno v:
Journal of Volcanology and Geothermal Research. 119:89-105
A growing trend in the field of volcanic hazard assessment is the use of computer models of a variety of flows to predict potential areas of devastation. These can be compared against historic and geologic evidence of past events for model calibratio
Autor:
N. F. Stevens
Publikováno v:
New Zealand Journal of Geology and Geophysics. 45:387-394
The prehistoric eruption of an exceptionally large andesitic lava flow into a glacial valley on the eastern flanks of Tongariro Volcano, North Island, New Zealand, prompts questions about its size and emplacement behaviour. In November 1996, the area
Publikováno v:
Geological Society, London, Memoirs. 21:583-594
Radar measurements from space are used to help monitor the evolution of a Peleean eruption on Soufriere Hills Volcano, Montserrat, during 1996 to April 1999. Data from four radar systems are used: ERS-1, ERS-2, Radarsat and JERS-1. We demonstrate tha
Autor:
M. Upton, Charles Williams, Jeremy Morley, John B. Murray, N. F. Stevens, Geoff Wadge, Jan-Peter Muller
Publikováno v:
Journal of Geophysical Research: Solid Earth. 106:11293-11313
Lava flows continue to move after they have been emplaced by flow mechanisms. This movement is largely vertical and can be detected using differential synthetic aperture radar (SAR) interferometry. There are three main components to this motion: (1)
Post-emplacement lava subsidence and the accuracy of ERS InSAR digital elevation models of volcanoes
Publikováno v:
International Journal of Remote Sensing. 22:819-828
Repeat-pass synthetic aperture radar interferometry (InSAR) using data acquired by the ERS platforms is an attractive method for acquiring topographic data of volcanoes. Caution is advised, however, when using this technique in regions covered by you
Autor:
J. B. Murray, N. F. Stevens
Publikováno v:
Bulletin of Volcanology. 61:515-526
Autor:
G. E. Norton, A. M. Lejeune, Paul D. Cole, A. D. Miller, M. D. Murphy, W. J. McGuire, R. S. J. Sparks, Richard Robertson, S. R. Young, N. F. Stevens, C. L. Harford
Publikováno v:
Geophysical Research Letters. 25:3429-3432
On 17 September 1996 the Soufriere Hills Volcano started a 9 hour period of dome collapse involving 11.7 × 106 m³ (DRE) of lava. After 2.5 hours of quiescence a sustained explosive eruption began. Estimated eruption parameters are: plume height at
Autor:
A. Smith, B. Scheuchl, N. F. Stevens, G. Wadge, S. F. Blake, C. Riley, M.D. Palmer, D.A. Rothery
Publikováno v:
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293).
SAR interferometry can, potentially, supply two types of useful information relevant to the 1995-99 eruption of Soufriere Hills Volcano, Montserrat: (i) the topography of the growing lava dome and its apron of pyroclastic flows, and (ii) the surface