New Insights into Long-Term Aseismic Deformation and Regional Strain Rates from GNSS Data Inversion: The Case of the Pollino and Castrovillari Faults

Cambiotti, Gabriele; Palano, Mimmo; Orecchio, Barbara; Marotta, Anna Maria; Barzaghi, Riccardo; Neri, Giancarlo; Sabadini, Roberto

doi:10.3390/rs12182921

Submit to this Journal Review for this Journal Edit a Special Issue

Article Menu

...

Open AccessArticle

New Insights into Long-Term Aseismic Deformation and Regional Strain Rates from GNSS Data Inversion: The Case of the Pollino and Castrovillari Faults

^1,*,

^3,†,

^1,†,

^4,†,

^3,† and

^1,†

Department of Earth Sciences, Università degli Studi di Milano, 20133 Milan, Italy

Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, 95125 Catania, Italy

Department of Physics and Earth Sciences, Messina University, 98166 Messina, Italy

⁴

Politecnico di Milano, DICA, 20133 Milan, Italy

Author to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Remote Sens. 2020, 12(18), 2921; https://doi.org/10.3390/rs12182921

Received: 30 June 2020 / Revised: 11 August 2020 / Accepted: 6 September 2020 / Published: 9 September 2020

(This article belongs to the Special Issue Ground Deformation Patterns Detection by InSAR and GNSS Techniques)

View Full-Text Download PDF

Browse Figures

Citation Export

Abstract

We present a novel inverse method for discriminating regional deformation and long-term fault creep by inversion of GNSS velocities observed at the spatial scale of intraplate faults by exploiting the different spatial signatures of these two mechanisms. In doing so our method provides a refined estimate of the upper bound of the strain accumulation process. As case study, we apply this method to a six year GNSS campaign (2003–2008) set up in the southern portion of the Pollino Range over the Castrovillari and Pollino faults. We show that regional deformation alone cannot explain the observed deformation pattern and implies high geodetic strain rate, with a WSW-ENE extension of

86 \pm 41 \times 10^{- 9} / yr

. Allowing for the possibility of fault creep, the modelling of GNSS velocities is consistent with their uncertainties and they are mainly explained by a shallow creep over the Pollino fault, with a normal/strike-slip mechanism up to 5 mm/yr. The regional strain rate decrease by about 70 percent and is characterized by WNW-ESE extension of

24 \pm 28 \times 10^{- 9} / yr

. The large uncertainties affecting our estimate of regional strain rate do not allow infering whether the tectonic regime of the area is extensional or strike-slip, although the latter is slightly more likely. View Full-Text

Keywords: regional deformation; fault creep; GNSS velocities; inverse theory

▼ Show Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Share and Cite

MDPI and ACS Style

Cambiotti, G.; Palano, M.; Orecchio, B.; Marotta, A.M.; Barzaghi, R.; Neri, G.; Sabadini, R. New Insights into Long-Term Aseismic Deformation and Regional Strain Rates from GNSS Data Inversion: The Case of the Pollino and Castrovillari Faults. Remote Sens. 2020, 12, 2921. https://doi.org/10.3390/rs12182921

AMA Style

Cambiotti G, Palano M, Orecchio B, Marotta AM, Barzaghi R, Neri G, Sabadini R. New Insights into Long-Term Aseismic Deformation and Regional Strain Rates from GNSS Data Inversion: The Case of the Pollino and Castrovillari Faults. Remote Sensing. 2020; 12(18):2921. https://doi.org/10.3390/rs12182921

Chicago/Turabian Style

Cambiotti, Gabriele, Mimmo Palano, Barbara Orecchio, Anna M. Marotta, Riccardo Barzaghi, Giancarlo Neri, and Roberto Sabadini. 2020. "New Insights into Long-Term Aseismic Deformation and Regional Strain Rates from GNSS Data Inversion: The Case of the Pollino and Castrovillari Faults" Remote Sensing 12, no. 18: 2921. https://doi.org/10.3390/rs12182921

Find Other Styles

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Abstract views Pdf views Html views

Article Menu

New Insights into Long-Term Aseismic Deformation and Regional Strain Rates from GNSS Data Inversion: The Case of the Pollino and Castrovillari Faults

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Article Access Map by Country/Region

Further Information

Guidelines

MDPI Initiatives

Follow MDPI