Work

Pressure sources versus surface loads: Analyzing volcano deformation signal composition with an application to Hekla volcano, Iceland

Year: 2010

Type: article

Abstract: The load of lava emplaced over periods of decades to centuries induces a gradual viscous response of the Earth resulting in measurable deformation. This effect should be considered in source model inversions for volcanic areas with large lava production and flow emplacement in small centralized regions. If deformation data remain uncorrected, constructive load and pressure source interference may result in an overestimate of depth and volume of a magma reservoir whereas destructive signal interference may cause these values to be underestimated. In both cases the source geometry preference could be biased. The ratio of horizontal and vertical displacements aids the identification of composite signals. We provide a method to quantify and remove the lava load deformation signals, using deformation at Hekla volcano, Iceland as an example.

Source: Geophysical Research Letters

DOI: 10.1029/2010gl044590

Authors: Ronni Grapenthin, Benedikt G. Ófeigsson, Freysteinn Sigmundsson, Erik Sturkell, Andrew Hooper

Institutions: University of Alaska Fairbanks, University of Iceland, Institute of Earth Sciences, University of Gothenburg, Delft University of Technology

Language: English

Topic: Synthetic Aperture Radar (SAR) Applications and Techniques

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W1661280573

FWCI: 3.113

Cites: 23

Cited by: 39

Related to: 10