Record Details

Shallow Hydrothermal Pressurization before the 2010 Eruption of Mount Sinabung Volcano, Indonesia, Observed by use of ALOS Satellite Radar Interferometry

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Shallow Hydrothermal Pressurization before the 2010 Eruption of Mount Sinabung Volcano, Indonesia, Observed by use of ALOS Satellite Radar Interferometry
 
Creator GONZALEZ, PJ
SINGH, KD
TIAMPO, KF
 
Subject EARTHS SURFACE
DEFORMATION
TOPOGRAPHY
InSAR
persistent scatterer analysis
time series analysis
volcano monitoring
ground deformation
 
Description Ground deformation in volcanic regions can be a precursor to resumption of activity. Volcanic eruptions are typically brief periods of activity punctuating very long inter-eruptive periods. This makes hazard evaluation a difficult task for volcanoes with low-recurrence eruptive activity, which often are poorly monitored. As a result, analysis of inter-eruptive periods by use of remote sensing techniques can provide important information on precursory activity and improve volcano hazard assessment. In August-September 2010 Mt Sinabung, Indonesia, reawakened after at least 400 years of dormancy. The ground deformation before this eruption was investigated by use of differential interferometric synthetic aperture radar data obtained from Japanese ALOS-PALSAR radar imagery between 05 January 2007 and 31 August 2010. Results from InSAR time series processing detected significant ground deformation (subsidence) at several locations on the Karo plateau, and uplift in the summit area of Mt Sinabung. The persistent scatterers density obtained by use of ALOS data is sufficient to enable extraction of temporal and spatial patterns of the deformation. The surface deformation at the summit can be modeled by using a spherical point-source model. Source data are consistent with a very shallow (hydrothermal) reservoir, with a linear increase in overpressure before the 2010 Mt Sinabung eruption. Hydrothermal origin is consistent with seismicity, tiltmeters, and analysis of ash products collected during and after the 2010 eruption. These results support the potential of L-band interferometry for hazard assessment in poorly monitored and highly vegetated volcanic areas and also indicate that hazard assessment for Indonesian volcanoes could potentially be improved by identification of precursory (inter-eruptive) uplift periods.
 
Publisher SPRINGER BASEL AG
 
Date 2016-01-14T10:53:00Z
2016-01-14T10:53:00Z
2015
 
Type Article
 
Identifier PURE AND APPLIED GEOPHYSICS, 172(11SI)3229-3245
0033-4553
1420-9136
http://dx.doi.org/10.1007/s00024-014-0915-7
http://dspace.library.iitb.ac.in/jspui/handle/100/17407
 
Language en