Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR)
Six horizontal borehole tensor strainmeters (TSM1-6) installed from Fall 2021 to Spring 2022 comprise the Alto Tiberina Near Fault Observatory Strainmeter Array (STAR), providing an unprecedented opportunity to investigate seismic and aseismic deformation from hazardous high- and low-angle normal f...
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McGill University
2025-06-01
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| Series: | Seismica |
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| Online Access: | https://seismica.library.mcgill.ca/article/view/1471 |
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| author | Catherine Hanagan Eugenio Mandler Rick Bennett Lauro Chiaraluce Mike Gottlieb Adriano Gualandi Amanda Hughes Wade Johnson Dave Mencin Simone Marzorati |
| author_facet | Catherine Hanagan Eugenio Mandler Rick Bennett Lauro Chiaraluce Mike Gottlieb Adriano Gualandi Amanda Hughes Wade Johnson Dave Mencin Simone Marzorati |
| author_sort | Catherine Hanagan |
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Six horizontal borehole tensor strainmeters (TSM1-6) installed from Fall 2021 to Spring 2022 comprise the Alto Tiberina Near Fault Observatory Strainmeter Array (STAR), providing an unprecedented opportunity to investigate seismic and aseismic deformation from hazardous high- and low-angle normal faults in Italy. Prior to use in tectonic applications, they require in-situ calibration and correction for non-tectonic signals. We tidally calibrate the instruments, characterize the calibration uncertainty, and test the results against environmental and earthquake signals originating from local to teleseismic distances. The STAR sites demonstrably deviate from assumptions common to the standard manufacturer's calibrations, including negative areal coupling at TSM3-6. While the tidally calibrated strains have ~3-56% uncertainty, the calibrated dynamic strains show interstation precision and accuracy to nanostrain levels, and static coseismic offsets in the array footprint are within uncertainty. TSM3 records a complex series of strains that may arise from dynamically triggered near-borehole fracture slip and fluid flow that does not appear to affect its sensitivity to lower strain rate deformation. Future calibration improvement may be afforded with longer stable timeseries, particularly for TSM4. Overall, our analyses demonstrate expanded geodetic capability for detecting deformation in the Alto Tiberina Near Fault Observatory.
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| format | Article |
| id | doaj-art-aa6cc3233ddc4a85bee3c85022348904 |
| institution | OA Journals |
| issn | 2816-9387 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | McGill University |
| record_format | Article |
| series | Seismica |
| spelling | doaj-art-aa6cc3233ddc4a85bee3c850223489042025-08-20T02:19:31ZengMcGill UniversitySeismica2816-93872025-06-014110.26443/seismica.v4i1.1471Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR)Catherine Hanagan0Eugenio Mandler1Rick Bennett2Lauro Chiaraluce3Mike Gottlieb4Adriano Gualandi5Amanda Hughes6Wade Johnson7Dave Mencin8Simone Marzorati9USGS Earthquake Science CenterIstituto Nazionale di Geofisica e Vulcanologia, Rome, ItalyNOAA National Geodetic Survey, Silver Spring, USAIstituto Nazionale di Geofisica e Vulcanologia, Rome, ItalyThe EarthScope Consortium, USA Department of Earth Sciences, University of Cambridge, UK Department of Geosciences, The University of Arizona, Tucson, AZ, USAThe EarthScope Consortium, USAThe EarthScope Consortium, USA Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy Six horizontal borehole tensor strainmeters (TSM1-6) installed from Fall 2021 to Spring 2022 comprise the Alto Tiberina Near Fault Observatory Strainmeter Array (STAR), providing an unprecedented opportunity to investigate seismic and aseismic deformation from hazardous high- and low-angle normal faults in Italy. Prior to use in tectonic applications, they require in-situ calibration and correction for non-tectonic signals. We tidally calibrate the instruments, characterize the calibration uncertainty, and test the results against environmental and earthquake signals originating from local to teleseismic distances. The STAR sites demonstrably deviate from assumptions common to the standard manufacturer's calibrations, including negative areal coupling at TSM3-6. While the tidally calibrated strains have ~3-56% uncertainty, the calibrated dynamic strains show interstation precision and accuracy to nanostrain levels, and static coseismic offsets in the array footprint are within uncertainty. TSM3 records a complex series of strains that may arise from dynamically triggered near-borehole fracture slip and fluid flow that does not appear to affect its sensitivity to lower strain rate deformation. Future calibration improvement may be afforded with longer stable timeseries, particularly for TSM4. Overall, our analyses demonstrate expanded geodetic capability for detecting deformation in the Alto Tiberina Near Fault Observatory. https://seismica.library.mcgill.ca/article/view/1471Borehole StrainmetersNear-Fault ObservatoryEarthquakesStrainCalibration |
| spellingShingle | Catherine Hanagan Eugenio Mandler Rick Bennett Lauro Chiaraluce Mike Gottlieb Adriano Gualandi Amanda Hughes Wade Johnson Dave Mencin Simone Marzorati Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR) Seismica Borehole Strainmeters Near-Fault Observatory Earthquakes Strain Calibration |
| title | Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR) |
| title_full | Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR) |
| title_fullStr | Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR) |
| title_full_unstemmed | Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR) |
| title_short | Characterization and validation of tidally calibrated strains from the Alto Tiberina Near Fault Observatory Strainmeter Array (TABOO-NFO-STAR) |
| title_sort | characterization and validation of tidally calibrated strains from the alto tiberina near fault observatory strainmeter array taboo nfo star |
| topic | Borehole Strainmeters Near-Fault Observatory Earthquakes Strain Calibration |
| url | https://seismica.library.mcgill.ca/article/view/1471 |
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