White Island

Volcano number:241040
Region:New Zealand to Fiji
Country:New Zealand
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):Levelling
Duration of observation:1967 - present
Inferred cause of deformation:Magmatic
Characteristics of deformation:

Peltier et al. (2009) present levelling data from 1967, over the the main crater of White Island volcano. 

Deformation data “reveals that shallow pressure sources (200–600 m deep) extending up to the subsurface dominated the long-term deformation pattern consisting of inflation/deflation cycles”. The authors suggest that “uplift and subsidence are interpreted in terms of increase or decrease in fluid pore pressure in response to changes of the heat and gas flux. The subsidence during and following eruptions could be also linked with removal of material at depth to feed the eruptions”.

GNS conducts permanent volcanic monitoring and surveillance at all active and potentially active volcanoes in New Zealand.

Reference:Peltier, A., B. Scott, and T. Hurst (2009), Ground deformation patterns at White Island volcano (New Zealand) between 1967 and 2008 deduced from levelling data, J. Volcanol. Geotherm. Res., 181, 207-218, doi:10.1016/j.jvolgeores.2009.01.020.
Reference:Smithsonian Institution Global Volcanism Program
Reference:Fournier, T. J., Pritchard, M. E., & Riddick, S. N. (2010). Duration, magnitude, and frequency of subaerial volcano deformation events: New results from Latin America using InSAR and a global synthesis. Geochemistry, Geophysics, Geosystems, 11(1).
Location:158.18, -37.52

View of White Island volcano. Source: Smithsonian Institution Global Volcanism Program