Constraints on Magma Chamber Geometry at Sierra Negra Volcano , Galápagos Islands , based on InSAR Observations

  title={Constraints on Magma Chamber Geometry at Sierra Negra Volcano , Gal{\'a}pagos Islands , based on InSAR Observations},
  author={Sang-Ho Yun and Paul Segall and Howard A. Zebker},
We investigate the problem of estimating magma chamber geometry using InSAR observations of Sierra Negra volcano, Galápagos. Ascending and descending interferograms are combined to determine vertical and one horizontal component of displacement. The ratio of maximum horizontal to vertical displacement suggests a sill-like source. Spherical or stock-like bodies are inconsistent with the data. We estimate the geometry of the sill assuming a horizontal, uniformly pressurized crack with unknown… CONTINUE READING
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