{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,22]],"date-time":"2026-03-22T11:39:57Z","timestamp":1774179597440,"version":"3.50.1"},"reference-count":34,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,4,24]],"date-time":"2021-04-24T00:00:00Z","timestamp":1619222400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Remote sensing techniques are leading methodologies for landslide characterization and monitoring. However, they may be limited in highly vegetated areas and do not allow for continuously tracking the evolution to failure in an early warning perspective. Alternative or complementary methods should be designed for potentially unstable sites in these environments. The results of a six-month passive seismic monitoring experiment on a prone-to-fall quartzite tower are here presented. Ambient seismic noise and microseismicity analyses were carried out on the continuously recorded seismic traces to characterize site stability and monitor its possible irreversible and reversible modifications driven by meteorological factors, in comparison with displacement measured on site. No irreversible modifications in the measured seismic parameters (i.e., natural resonance frequencies of the tower, seismic velocity changes, rupture-related microseismic signals) were detected in the monitored period, and no permanent displacement was observed at the tower top. Results highlighted, however, a strong temperature control on these parameters and unusual preferential vibration directions with respect to the literature case studies on nearly 2D rock columns, likely due the tower geometric constraints, as confirmed by 3D numerical modeling. A clear correlation with the tower displacement rate was found in the results, supporting the suitability of passive seismic monitoring systems for site characterization and early waning purposes.<\/jats:p>","DOI":"10.3390\/rs13091664","type":"journal-article","created":{"date-parts":[[2021,4,25]],"date-time":"2021-04-25T02:12:57Z","timestamp":1619316777000},"page":"1664","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Ambient Seismic Noise and Microseismicity Monitoring of a Prone-To-Fall Quartzite Tower (Ormea, NW Italy)"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9818-7464","authenticated-orcid":false,"given":"Chiara","family":"Colombero","sequence":"first","affiliation":[{"name":"Department of Environmental, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, 10129 Torino, Italy"}]},{"given":"Alberto","family":"Godio","sequence":"additional","affiliation":[{"name":"Department of Environmental, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, 10129 Torino, Italy"}]},{"given":"Denis","family":"Jongmans","sequence":"additional","affiliation":[{"name":"University Grenoble Alpes, University Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1007\/s10712-021-09632-w","article-title":"Seismic noise parameters as indicators of reversible modifications in slope stability: A review","volume":"42","author":"Colombero","year":"2021","journal-title":"Surv. Geophys."},{"key":"ref_2","first-page":"04043","article-title":"Dynamic response of the Chamousset rock column (Western Alps, France)","volume":"115","author":"Baillet","year":"2010","journal-title":"J. Geophys. Res. Space Phys."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Bi\u00e8vre, G., Franz, M., Larose, E., Carri\u00e8re, S., Jongmans, D., and Jaboyedoff, M. (2018). Influence of environmental parameters on the seismic velocity changes in a clayey mudflow (Pont-Bourquin Landslide, Switzerland). Eng. Geol., 248\u2013257.","DOI":"10.1016\/j.enggeo.2018.08.013"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1811","DOI":"10.1029\/2017JF004233","article-title":"Dynamics of an Active Earthflow Inferred from Surface Wave Monitoring","volume":"123","author":"Bertello","year":"2018","journal-title":"J. Geophys. Res. Earth Surf."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1777","DOI":"10.1093\/gji\/ggaa050","article-title":"Seismic characterization of a clay-block rupture in Harmali\u00e8re landslide, French Western Alps","volume":"221","author":"Fiolleau","year":"2020","journal-title":"Geophys. J. Int."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1093\/gji\/ggx424","article-title":"Ambient vibration characterization and monitoring of a rock slope close to collapse","volume":"212","author":"Gischig","year":"2018","journal-title":"Geophys. J. Int."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1058","DOI":"10.1093\/gji\/ggw440","article-title":"The dynamic response of prone-to-fall columns to ambient vibrations: Comparison between measurements and numerical modelling","volume":"208","author":"Valentin","year":"2017","journal-title":"Geophys. J. Int."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"136","DOI":"10.1016\/j.enggeo.2017.06.002","article-title":"Monitoring rock rein-forcement works with ambient vibrations: La Bourne case study (Vercors, France)","volume":"226","author":"Bottelin","year":"2017","journal-title":"Eng. Geol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"205","DOI":"10.2113\/JEEG18.4.205","article-title":"Spectral Analysis of Prone-to-fall Rock Compartments using Ambient Vibrations","volume":"18","author":"Bottelin","year":"2013","journal-title":"J. Environ. Eng. Geophys."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"849","DOI":"10.1093\/gji\/ggt046","article-title":"Modal and thermal analysis of Les Arches unstable rock column (Vercors massif, French Alps)","volume":"194","author":"Bottelin","year":"2013","journal-title":"Geophys. J. Int."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"6346","DOI":"10.1002\/2017JB014111","article-title":"Characterization of the 3-D fracture setting of an unstable rock mass: From surface and seismic investigations to numerical modeling","volume":"122","author":"Colombero","year":"2017","journal-title":"J. Geophys. Res. Solid Earth"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1876","DOI":"10.1093\/gji\/ggy090","article-title":"Integration of ambient seismic noise monitoring, displacement and meteorological measurements to infer the temperature-controlled long-term evolution of a complex prone-to-fall cliff","volume":"213","author":"Colombero","year":"2018","journal-title":"Geophys. J. Int."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"08314","DOI":"10.1029\/2004GL022270","article-title":"Seismic precursory patterns before a cliff collapse and critical point phenomena","volume":"32","author":"Amitrano","year":"2005","journal-title":"Geophys. Res. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"341","DOI":"10.1785\/0120100110","article-title":"Location of Seismic Signals Associated with Microearthquakes and Rockfalls on the Sechilienne Landslide, French Alps","volume":"101","author":"Lacroix","year":"2011","journal-title":"Bull. Seism. Soc. Am."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1111\/j.1365-246X.2011.05046.x","article-title":"Analysis of seismic signals recorded on a prone-to-fall rock column (Vercors massif, French Alps)","volume":"186","author":"Levy","year":"2011","journal-title":"Geophys. J. Int."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/j.enggeo.2019.02.028","article-title":"Detection and geometric charachterization of rock mass discontinuities using 3D high-resolution digital outcrop model generated from RPAS imagery\u2014Ormea rock slope, Italy","volume":"252","author":"Menegoni","year":"2019","journal-title":"Eng. Geol."},{"key":"ref_17","first-page":"31","article-title":"The Lower Triassic continental to transitional deposits of the Maritime Alps (NW Italy): Stratigraphical and sedimentological features","volume":"10","author":"Costamagna","year":"2018","journal-title":"J. Mediterr. Earth Sci."},{"key":"ref_18","unstructured":"Bendat, J.S., and Piersol, A.G. (1971). Random Data: Analysis and Measurement Procedures, Wiley."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1517","DOI":"10.1785\/012003001","article-title":"Ambient noise levels in the continental United States","volume":"94","author":"McNamara","year":"2004","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Peterson, J. (1993). Observations and Modeling of Background Seismic Noise. Open-File Report 93\u2013322.","DOI":"10.3133\/ofr93322"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Gudmundsson, A. (2011). Rock Fractures in Geological Processes, Cambridge University Press (CUP).","DOI":"10.1017\/CBO9780511975684"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"409","DOI":"10.1111\/j.1365-2478.1979.tb00977.x","article-title":"Seismic classification of rock mass qualities","volume":"27","author":"Sandberg","year":"1979","journal-title":"Geophys. Prospect."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1239","DOI":"10.1111\/j.1365-246X.2007.03374.x","article-title":"Processing seismic ambient noise data to obtain reliable broad-band surface wave dispersion measurements","volume":"169","author":"Bensen","year":"2007","journal-title":"Geophys. J. Int."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Mainsant, G., LaRose, E., Br\u00f6nnimann, C., Jongmans, D., Michoud, C., and Jaboyedoff, M. (2012). Ambient seismic noise monitoring of a clay landslide: Toward failure prediction. J. Geophys. Res. Space Phys., 117.","DOI":"10.1029\/2011JF002159"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Sens-Sch\u00f6nfelder, C., and Wegler, U. (2006). Passive image interferometry and seasonal variations of seismic velocities at Merapi Volcano, Indonesia. Geophys. Res. Lett., 33.","DOI":"10.1029\/2006GL027797"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"3688","DOI":"10.1121\/1.3125345","article-title":"Stability of monitoring weak changes in multiply scattering media with ambient noise correlation: Laboratory experiments","volume":"125","author":"Hadziioannou","year":"2009","journal-title":"J. Acoust. Soc. Am."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"03016","DOI":"10.1029\/2009JF001532","article-title":"Seismic monitoring of S\u00e9chilienne rockslide (French Alps): Analysis of seismic signals and their correlation with rainfalls","volume":"115","author":"Helmstetter","year":"2010","journal-title":"J. Geophys. Res. Space Phys."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1673","DOI":"10.1002\/2017JB014612","article-title":"Microseismicity of an Unstable Rock Mass: From Field Monitoring to Laboratory Testing","volume":"123","author":"Colombero","year":"2018","journal-title":"J. Geophys. Res. Solid Earth"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1082","DOI":"10.1002\/2013JF002970","article-title":"Automated identification, location, and volume estimation of rockfalls at Piton de la Fournaise volcano","volume":"119","author":"Hibert","year":"2014","journal-title":"J. Geophys. Res. Earth Surf."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"955","DOI":"10.5194\/esurf-6-955-2018","article-title":"Seismic detection of rockslides at regional scale: Examples from the Eastern Alps and feasibility of kurtosis-based event location","volume":"6","author":"Fuchs","year":"2018","journal-title":"Earth Surf. Dyn."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1109\/TIT.1982.1056489","article-title":"Least squares quantization in PCM","volume":"28","author":"Lloyd","year":"1982","journal-title":"IEEE Trans. Inf. Theory"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"104135","DOI":"10.1016\/j.ijrmms.2019.104135","article-title":"Characteristic microseismicity during the development process of intermittent rockburst in a deep railway tunnel","volume":"124","author":"Feng","year":"2019","journal-title":"Int. J. Rock Mech. Min. Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1130\/G23195A.1","article-title":"Seismicity preceding volcanic eruptions: New experimental insights","volume":"35","author":"Burlini","year":"2007","journal-title":"Geology"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1016\/j.epsl.2010.06.033","article-title":"Spatio-temporal evolution of volcano seismicity: A laboratory study","volume":"297","author":"Benson","year":"2010","journal-title":"Earth Planet. Sci. Lett."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/9\/1664\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:52:21Z","timestamp":1760161941000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/9\/1664"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,4,24]]},"references-count":34,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2021,5]]}},"alternative-id":["rs13091664"],"URL":"https:\/\/doi.org\/10.3390\/rs13091664","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,4,24]]}}}