Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex
<p>On 2 October 2020, the Maritime Alps in southern France were struck by the devastating Storm Alex, which caused locally more than 600 mm of rain in less than 24 h. The extreme rainfall and flooding destroyed regional rain and stream gauges. That hinders our understanding of the spatial and...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-05-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | https://nhess.copernicus.org/articles/22/1541/2022/nhess-22-1541-2022.pdf |
| _version_ | 1811307931547729920 |
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| author | M. Chmiel M. Chmiel M. Chmiel M. Godano M. Piantini P. Brigode P. Brigode F. Gimbert M. Bakker F. Courboulex J.-P. Ampuero D. Rivet A. Sladen D. Ambrois M. Chapuis |
| author_facet | M. Chmiel M. Chmiel M. Chmiel M. Godano M. Piantini P. Brigode P. Brigode F. Gimbert M. Bakker F. Courboulex J.-P. Ampuero D. Rivet A. Sladen D. Ambrois M. Chapuis |
| author_sort | M. Chmiel |
| collection | DOAJ |
| description | <p>On 2 October 2020, the Maritime Alps in southern France were struck by the devastating Storm Alex, which caused locally more than 600 mm of rain in less than 24 h. The extreme rainfall and flooding destroyed regional rain and stream gauges. That hinders our understanding of the spatial and temporal dynamics of rainfall–runoff processes during the storm. Here, we show that seismological observations from permanent seismic stations constrain these processes at a catchment scale. The analysis of seismic power, peak frequency, and the back azimuth provides us with the timing and velocity of the propagation of flash-flood waves associated with bedload-dominated phases of the flood on the Vésubie River. Moreover, the combined short-term average to long-term average ratio and template-matching earthquake detection reveal that 114 local earthquakes between local magnitude <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><msub><mi>M</mi><mi mathvariant="normal">L</mi></msub><mo>=</mo><mo>-</mo><mn mathvariant="normal">0.5</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="12pt" class="svg-formula" dspmath="mathimg" md5hash="bcb46319d0a86e32cfd5c86d7c5ae0d9"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="nhess-22-1541-2022-ie00001.svg" width="52pt" height="12pt" src="nhess-22-1541-2022-ie00001.png"/></svg:svg></span></span> and <span class="inline-formula"><i>M</i><sub>L</sub>=2</span> were triggered by the hydrological loading and/or the resulting in situ underground pore pressure increase. This study shows the impact of Storm Alex on the Earth's surface and deep-layer processes and paves the way for future works that can reveal further details of these processes.</p> |
| first_indexed | 2024-04-13T09:14:07Z |
| format | Article |
| id | doaj.art-25dd68b0d9d44351a7ad6eb291f176c7 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-04-13T09:14:07Z |
| publishDate | 2022-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-25dd68b0d9d44351a7ad6eb291f176c72022-12-22T02:52:47ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812022-05-01221541155810.5194/nhess-22-1541-2022Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm AlexM. Chmiel0M. Chmiel1M. Chmiel2M. Godano3M. Piantini4P. Brigode5P. Brigode6F. Gimbert7M. Bakker8F. Courboulex9J.-P. Ampuero10D. Rivet11A. Sladen12D. Ambrois13M. Chapuis14Géoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceLaboratory of Hydraulics, Hydrology and Glaciology, ETH Zürich, Zurich, SwitzerlandSwiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, SwitzerlandGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceInstitute for Geosciences and Environmental Research (IGE), CNRS/INSU, IRD, Université Grenoble Alpes and Grenoble INP, 38 058 Grenoble, FranceGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceINRAE, UR HYCAR, Université Paris-Saclay, 1 Rue Pierre-Gilles de Gennes, 92160 Antony, FranceInstitute for Geosciences and Environmental Research (IGE), CNRS/INSU, IRD, Université Grenoble Alpes and Grenoble INP, 38 058 Grenoble, FranceInstitute for Geosciences and Environmental Research (IGE), CNRS/INSU, IRD, Université Grenoble Alpes and Grenoble INP, 38 058 Grenoble, FranceGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceGéoazur, Observatoire de la Côte d'Azur, CNRS, IRD, Université Côte d'Azur, 06905 Sophia Antipolis, FranceESPACE, CNRS, Université Côte d'Azur, bd Edouard Herriot, 06204 Nice, France<p>On 2 October 2020, the Maritime Alps in southern France were struck by the devastating Storm Alex, which caused locally more than 600 mm of rain in less than 24 h. The extreme rainfall and flooding destroyed regional rain and stream gauges. That hinders our understanding of the spatial and temporal dynamics of rainfall–runoff processes during the storm. Here, we show that seismological observations from permanent seismic stations constrain these processes at a catchment scale. The analysis of seismic power, peak frequency, and the back azimuth provides us with the timing and velocity of the propagation of flash-flood waves associated with bedload-dominated phases of the flood on the Vésubie River. Moreover, the combined short-term average to long-term average ratio and template-matching earthquake detection reveal that 114 local earthquakes between local magnitude <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><msub><mi>M</mi><mi mathvariant="normal">L</mi></msub><mo>=</mo><mo>-</mo><mn mathvariant="normal">0.5</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="12pt" class="svg-formula" dspmath="mathimg" md5hash="bcb46319d0a86e32cfd5c86d7c5ae0d9"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="nhess-22-1541-2022-ie00001.svg" width="52pt" height="12pt" src="nhess-22-1541-2022-ie00001.png"/></svg:svg></span></span> and <span class="inline-formula"><i>M</i><sub>L</sub>=2</span> were triggered by the hydrological loading and/or the resulting in situ underground pore pressure increase. This study shows the impact of Storm Alex on the Earth's surface and deep-layer processes and paves the way for future works that can reveal further details of these processes.</p>https://nhess.copernicus.org/articles/22/1541/2022/nhess-22-1541-2022.pdf |
| spellingShingle | M. Chmiel M. Chmiel M. Chmiel M. Godano M. Piantini P. Brigode P. Brigode F. Gimbert M. Bakker F. Courboulex J.-P. Ampuero D. Rivet A. Sladen D. Ambrois M. Chapuis Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex Natural Hazards and Earth System Sciences |
| title | Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex |
| title_full | Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex |
| title_fullStr | Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex |
| title_full_unstemmed | Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex |
| title_short | Brief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm Alex |
| title_sort | brief communication seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with storm alex |
| url | https://nhess.copernicus.org/articles/22/1541/2022/nhess-22-1541-2022.pdf |
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