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Near-field fault slip of the 2016 Vettore Mw 6.6 earthquake (Central Italy) measured using low-cost GNSS

Wilkinson, M.W.; McCaffrey, K.; Jones, R.R.; Roberts, G.P.; Holdsworth, R.E.; Gregory, L.; Walters, R.J.; Wedmore, L.; Goodall, H.; Iezzi, F.

Near-field fault slip of the 2016 Vettore Mw 6.6 earthquake (Central Italy) measured using low-cost GNSS Thumbnail


Authors

M.W. Wilkinson

R.R. Jones

G.P. Roberts

L. Gregory

R.J. Walters

L. Wedmore

H. Goodall

F. Iezzi



Abstract

The temporal evolution of slip on surface ruptures during an earthquake is important for assessing fault displacement, defining seismic hazard and for predicting ground motion. However, measurements of near-field surface displacement at high temporal resolution are elusive. We present a novel record of near-field co-seismic displacement, measured with 1-second temporal resolution during the 30th October 2016 Mw 6.6 Vettore earthquake (Central Italy), using low-cost Global Navigation Satellite System (GNSS) receivers located in the footwall and hangingwall of the Mt. Vettore - Mt. Bove fault system, close to new surface ruptures. We observe a clear temporal and spatial link between our near-field record and InSAR, far-field GPS data, regional measurements from the Italian Strong Motion and National Seismic networks, and field measurements of surface ruptures. Comparison of these datasets illustrates that the observed surface ruptures are the propagation of slip from depth on a surface rupturing (i.e. capable) fault array, as a direct and immediate response to the 30th October earthquake. Large near-field displacement ceased within 6–8 seconds of the origin time, implying that shaking induced gravitational processes were not the primary driving mechanism. We demonstrate that low-cost GNSS is an accurate monitoring tool when installed as custom-made, short-baseline networks.

Citation

Wilkinson, M., McCaffrey, K., Jones, R., Roberts, G., Holdsworth, R., Gregory, L., …Iezzi, F. (2017). Near-field fault slip of the 2016 Vettore Mw 6.6 earthquake (Central Italy) measured using low-cost GNSS. Scientific Reports, 7, Article 4612. https://doi.org/10.1038/s41598-017-04917-w

Journal Article Type Article
Acceptance Date May 22, 2017
Online Publication Date Jul 4, 2017
Publication Date Jul 4, 2017
Deposit Date Mar 29, 2017
Publicly Available Date Jul 4, 2017
Journal Scientific Reports
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 7
Article Number 4612
DOI https://doi.org/10.1038/s41598-017-04917-w

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© The Author(s) 2017 This article is licensed under a Creative Commons Attribution 4.0 International
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