Towards a standard typology of endogenous landslide seismic sources
<p>The objective of this work is to propose a standard classification of seismic signals generated by gravitational processes and detected at close distances (<span class="inline-formula"><1</span> km). We review the studies where seismic instruments hav...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-11-01
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| Series: | Earth Surface Dynamics |
| Online Access: | https://www.earth-surf-dynam.net/6/1059/2018/esurf-6-1059-2018.pdf |
| _version_ | 1818554061834682368 |
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| author | F. Provost J.-P. Malet C. Hibert A. Helmstetter M. Radiguet D. Amitrano N. Langet E. Larose C. Abancó M. Hürlimann T. Lebourg C. Levy G. Le Roy G. Le Roy P. Ulrich M. Vidal B. Vial |
| author_facet | F. Provost J.-P. Malet C. Hibert A. Helmstetter M. Radiguet D. Amitrano N. Langet E. Larose C. Abancó M. Hürlimann T. Lebourg C. Levy G. Le Roy G. Le Roy P. Ulrich M. Vidal B. Vial |
| author_sort | F. Provost |
| collection | DOAJ |
| description | <p>The objective of this work is to propose a standard classification of seismic
signals generated by gravitational processes and detected at close distances
(<span class="inline-formula"><1</span> km). We review the studies where seismic instruments have been
installed on unstable slopes and discuss the choice of the seismic
instruments and the network geometries. Seismic observations acquired at 13
unstable slopes are analyzed in order to construct the proposed typology. The
selected slopes are affected by various landslide types (slide, fall, topple
and flow) triggered in various material (from unconsolidated soils to
consolidated rocks). We investigate high-frequency bands (<span class="inline-formula">>1</span> Hz) where
most of the seismic energy is recorded at the 1 km sensor to source
distances. Several signal properties (duration, spectral content and
spectrogram shape) are used to describe the sources. We observe that similar
gravitational processes generate similar signals at different slopes. Three
main classes can be differentiated mainly from the length of the signals, the
number of peaks and the duration of the autocorrelation. The classes are the
“slopequake” class, which corresponds to sources potentially occurring
within the landslide body; the “rockfall” class, which corresponds to
signals generated by rock block impacts; and the “granular flow” class,
which corresponds to signals generated by wet or dry debris/rock flows.
Subclasses are further proposed to differentiate specific signal properties
(frequency content, resonance, precursory signal). The signal properties of
each class and subclass are described and several signals of the same class
recorded at different slopes are presented. Their potential origins are
discussed. The typology aims to serve as a standard for further comparisons
of the endogenous microseismicity recorded on landslides.</p> |
| first_indexed | 2024-12-12T09:34:13Z |
| format | Article |
| id | doaj.art-8d74578cf2734ad4aad8229f785acae6 |
| institution | Directory Open Access Journal |
| issn | 2196-6311 2196-632X |
| language | English |
| last_indexed | 2024-12-12T09:34:13Z |
| publishDate | 2018-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth Surface Dynamics |
| spelling | doaj.art-8d74578cf2734ad4aad8229f785acae62022-12-22T00:28:46ZengCopernicus PublicationsEarth Surface Dynamics2196-63112196-632X2018-11-0161059108810.5194/esurf-6-1059-2018Towards a standard typology of endogenous landslide seismic sourcesF. Provost0J.-P. Malet1C. Hibert2A. Helmstetter3M. Radiguet4D. Amitrano5N. Langet6E. Larose7C. Abancó8M. Hürlimann9T. Lebourg10C. Levy11G. Le Roy12G. Le Roy13P. Ulrich14M. Vidal15B. Vial16Institut de Physique du Globe de Strasbourg, CNRS UMR 7516, EOST/Université de Strasbourg, 5 rue Descartes, 67084 Strasbourg CEDEX, FranceInstitut de Physique du Globe de Strasbourg, CNRS UMR 7516, EOST/Université de Strasbourg, 5 rue Descartes, 67084 Strasbourg CEDEX, FranceInstitut de Physique du Globe de Strasbourg, CNRS UMR 7516, EOST/Université de Strasbourg, 5 rue Descartes, 67084 Strasbourg CEDEX, FranceUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, FranceUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, FranceUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, FranceNorsar, Gunnar Randers Vei 15, 2007 Kjeller, NorwayUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, FranceGeological Hazards Prevention Unit, Institut Cartografic i Geologic de Catalunya, Parc de Montjuïc, 08038 Barcelona, SpainDepartament of Civil and Environmental Engineering, UPC-BarcelonaTECH, C. Jordi Girona 1–3, 08034 Barcelona, SpainGéosciences Azur, CNRS UMR 7329, OCA/Université de Nice, 250 rue Albert Einstein, 06905 Sophia-Antipolis CEDEX, FranceBRGM, Avenue C. Guillemin, 45100 Orléans, FranceUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, FranceGéolithe, Crolles, FranceInstitut de Physique du Globe de Strasbourg, CNRS UMR 7516, EOST/Université de Strasbourg, 5 rue Descartes, 67084 Strasbourg CEDEX, FranceBRGM, Avenue C. Guillemin, 45100 Orléans, FranceUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France<p>The objective of this work is to propose a standard classification of seismic signals generated by gravitational processes and detected at close distances (<span class="inline-formula"><1</span> km). We review the studies where seismic instruments have been installed on unstable slopes and discuss the choice of the seismic instruments and the network geometries. Seismic observations acquired at 13 unstable slopes are analyzed in order to construct the proposed typology. The selected slopes are affected by various landslide types (slide, fall, topple and flow) triggered in various material (from unconsolidated soils to consolidated rocks). We investigate high-frequency bands (<span class="inline-formula">>1</span> Hz) where most of the seismic energy is recorded at the 1 km sensor to source distances. Several signal properties (duration, spectral content and spectrogram shape) are used to describe the sources. We observe that similar gravitational processes generate similar signals at different slopes. Three main classes can be differentiated mainly from the length of the signals, the number of peaks and the duration of the autocorrelation. The classes are the “slopequake” class, which corresponds to sources potentially occurring within the landslide body; the “rockfall” class, which corresponds to signals generated by rock block impacts; and the “granular flow” class, which corresponds to signals generated by wet or dry debris/rock flows. Subclasses are further proposed to differentiate specific signal properties (frequency content, resonance, precursory signal). The signal properties of each class and subclass are described and several signals of the same class recorded at different slopes are presented. Their potential origins are discussed. The typology aims to serve as a standard for further comparisons of the endogenous microseismicity recorded on landslides.</p>https://www.earth-surf-dynam.net/6/1059/2018/esurf-6-1059-2018.pdf |
| spellingShingle | F. Provost J.-P. Malet C. Hibert A. Helmstetter M. Radiguet D. Amitrano N. Langet E. Larose C. Abancó M. Hürlimann T. Lebourg C. Levy G. Le Roy G. Le Roy P. Ulrich M. Vidal B. Vial Towards a standard typology of endogenous landslide seismic sources Earth Surface Dynamics |
| title | Towards a standard typology of endogenous landslide seismic sources |
| title_full | Towards a standard typology of endogenous landslide seismic sources |
| title_fullStr | Towards a standard typology of endogenous landslide seismic sources |
| title_full_unstemmed | Towards a standard typology of endogenous landslide seismic sources |
| title_short | Towards a standard typology of endogenous landslide seismic sources |
| title_sort | towards a standard typology of endogenous landslide seismic sources |
| url | https://www.earth-surf-dynam.net/6/1059/2018/esurf-6-1059-2018.pdf |
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