Uncertainty loops in travel-time tomography from nonlinear wave physics

Galetti, Erica; Curtis, Andrew; Meles, Giovanni Angelo; Baptie, Brian. 2015 Uncertainty loops in travel-time tomography from nonlinear wave physics. Physical Review Letters, 114 (14), 148501. 10.1103/PhysRevLett.114.148501

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Abstract/Summary

Estimating image uncertainty is fundamental to guiding the interpretation of geoscientific tomographic maps.We reveal novel uncertainty topologies (loops) which indicate that while the speeds of both low- and high-velocity anomalies may be well constrained, their locations tend to remain uncertain. The effect is widespread: loops dominate around a third of United Kingdom Love wave tomographic uncertainties, changing the nature of interpretation of the observed anomalies. Loops exist due to 2nd and higher order aspects of wave physics; hence, although such structures must exist in many tomographic studies in the physical sciences and medicine, they are unobservable using standard linearized methods. Higher order methods might fruitfully be adopted.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1103/PhysRevLett.114.148501
ISSN:	0031-9007
Date made live:	04 Aug 2015 07:42 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/511434

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