Articles | Volume 24, issue 10
https://doi.org/10.5194/nhess-24-3401-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-24-3401-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Oct 2024
Research article |
| 07 Oct 2024
| 07 Oct 2024
Co- and postseismic subaquatic evidence for prehistoric fault activity near Coyhaique, Aysén Region, Chile
Renard Centre of Marine Geology (RCMG), Department of Geology, Ghent University, 9000 Ghent, Belgium
Katleen Wils
Renard Centre of Marine Geology (RCMG), Department of Geology, Ghent University, 9000 Ghent, Belgium
Kris Vanneste
Royal Observatory of Belgium, 1180 Brussels, Belgium
Roberto Urrutia
Centro EULA, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Mario Pino
Instituto de Ciencias de la Tierra, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
Catherine Kissel
Laboratoire des Sciences du Climat et de l'Environnement/IPSL, CEA/CNRS/UVSQ, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
Marc De Batist
Renard Centre of Marine Geology (RCMG), Department of Geology, Ghent University, 9000 Ghent, Belgium
Maarten Van Daele
Renard Centre of Marine Geology (RCMG), Department of Geology, Ghent University, 9000 Ghent, Belgium
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Cited articles
Adams, J.: Paleoseismicity of the Cascadia Subduction Zone: Evidence from turbidites off the Oregon-Washington Margin, Tectonics, 9, 569–583, https://doi.org/10.1029/TC009i004p00569, 1990.
Agurto, H., Rietbrock, A., Barrientos, S., Bataille, K., and Legrand, D.: Seismo-tectonic structure of the Aysén Region, Southern Chile, inferred from the 2007 Mw=6.2 Aysén earthquake sequence, Geophys. J. Int., 190, 116–130, https://doi.org/10.1111/j.1365-246X.2012.05507.x, 2012.
Astroza, M., Sandoval, M., and Kausel, E.: Estudio comparativo de los effectos de los sismos Chilenos de subducción del tipo intraplaca de profundidad intermedia, in: Congreso Chileno de Sismología e ingeniaría Antisísmica, Concepción, Chile, 16–19 November 2005, A01–05, 2005.
Avşar, U., Hubert-Ferrari, A., Batist, M. De, and Fagel, N.: A 3400 year lacustrine paleoseismic record from the North Anatolian Fault, Turkey: Implications for bimodal recurrence behavior, Geophys. Res. Lett., 41, 377–384, https://doi.org/10.1002/2013GL058221, 2014.
Bakun, W. H. and Wentworth, C. M.: Estimating Earthquake Location and Magnitude from Seismic Intensity Data, B. Seismol. Soc. Am., 87, 1502–1521, 1997.
Beck, C., Campos, C., Eriş, K. K., Çağatay, N., Mercier de Lepinay, B., and Jouanne, F.: Estimation of successive coseismic vertical offsets using coeval sedimentary events – application to the southwestern limit of the Sea of Marmara's Central Basin (North Anatolian Fault), Nat. Hazards Earth Syst. Sci., 15, 247–259, https://doi.org/10.5194/nhess-15-247-2015, 2015.
Bernhardt, A., Melnick, D., Hebbeln, D., Lückge, A., and Strecker, M. R.: Turbidite paleoseismology along the active continental margin of Chile – Feasible or not?, Quat. Sci. Rev., 120, 71–92, https://doi.org/10.1016/j.quascirev.2015.04.001, 2015.
Blaauw, M.: Methods and code for “classical” age-modelling of radiocarbon sequences, Quat. Geochronol., 5, 512–518, https://doi.org/10.1016/j.quageo.2010.01.002, 2010.
Carneiro, L. M., do Rosário Zucchi, M., de Jesus, T. B., da Silva Júnior, J. B., and Hadlich, G. M.: δ13C, δ15N and TOC/TN as indicators of the origin of organic matter in sediment samples from the estuary of a tropical river, Mar. Pollut. Bull., 172, 112857, https://doi.org/10.1016/j.marpolbul.2021.112857, 2021.
Cembrano, J. and Lara, L.: The link between volcanism and tectonics in the southern volcanic zone of the Chilean Andes: A review, Tectonophysics, 471, 96–113, https://doi.org/10.1016/j.tecto.2009.02.038, 2009.
Cembrano, J., Lara, L., Lavenu, A., and Hervé, F.: Long-term and short-term kinematic history of the Liquiñe Ofqui fault zone, southern Chile: a review and implications for geologic hazard assessment, in: Proceedings Geological Society of America Annual Meeting, Denver, Colorado, USA, 28–31 October 2007, 2007.
Davies, B. J., Darvill, C. M., Lovell, H., Bendle, J. M., Dowdeswell, J. A., Fabel, D., García, J. L., Geiger, A., Glasser, N. F., Gheorghiu, D. M., Harrison, S., Hein, A. S., Kaplan, M. R., Martin, J. R. V., Mendelova, M., Palmer, A., Pelto, M., Rodés, Á., Sagredo, E. A., Smedley, R. K., Smellie, J. L., and Thorndycraft, V. R.: The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE), Earth. Sci. Rev., 204, 77, https://doi.org/10.1016/j.earscirev.2020.103152, 2020.
De La Cruz, R., Suárez, M., Belmar, M., Quiroz, D., and Bell, M.: Area Coihaique-Balmaceda, Region Aisen del General Carlos Ibañez del Campo, Servicio Nacional de Geología y Minería, Carta Geológica de Chile, Serie Geología Básica, No. 80, 2003.
Del Grosso, V. A.: New equation for the speed of sound in natural waters (with comparisons to other equations), Journal of the Acoustic Society of America, 56, 1084–1091, 1974.
Ellies, A.: Soil erosion and its control in Chile – An overview, Acta Geologica Hispanica, 35, 279–284, 2000.
Fagel, N., Pedreros, P., Alvarez, D., Israde Alcantara, I., Vega Alay, I., Namur, O., Araneda, A., Schmidt, S., Lepoint, G., and Urrutia, R.: Volcanic, tectonic and climate controls on lacustrine sedimentary supplies over the last millenia in NE Chilean Patagonia (Lake Esponja, Aysen, 45° S), Holocene, 33, 518–535, https://doi.org/10.1177/09596836231151828, 2023.
Field, E. H., Arrowsmith, R. J., Biasi, G. P., Bird, P., Dawson, T. E., Felzer, K. R., Jackson, D. D., Johnson, K. M., Jordan, T. H., Madden, C., Michael, A. J., Milner, K. R., Page, M. T., Parsons, T., Powers, P. M., Shaw, B. E., Thatcher, W. R., Weldon, R. J., and Zeng, Y.: Uniform California Earthquake Rupture Forecast, version 3 (UCERF3) – The time-independent model, B. Seismol. Soc. Am., 104, 1122–1180, https://doi.org/10.1785/0120130164, 2014.
Gastineau, R., de Sigoyer, J., Sabatier, P., Fabbri, S. C., Anselmetti, F. S., Develle, A. L., Şahin, M., Gündüz, S., Niessen, F., and Gebhardt, A. C.: Active Subaquatic Fault Segments in Lake Iznik Along the Middle Strand of the North Anatolian Fault, NW Turkey, Tectonics, 40, 22, https://doi.org/10.1029/2020TC006404, 2021.
Gilli, A., Ariztegui, D., Anselmetti, F. S., McKenzie, J. A., Markgraf, V., Hajdas, I., and McCulloch, R. D.: Mid-Holocene strengthening of the Southern Westerlies in South America – Sedimentological evidences from Lago Cardiel, Argentina (49° S), Glob. Planet. Change, 49, 75–93, https://doi.org/10.1016/j.gloplacha.2005.05.004, 2005.
Gut, B.: Geology, climate and soils of Patagonia, in: Trees in Patagonia, Birkhäuser, Basel, 9–18, https://doi.org/10.1007/978-3-7643-8838-6_4, 2008.
Hayes, G. P., Moore, G. L., Portner, D. E., Hearne, M., Flamme, H., Furtney, M., and Smoczyk, G. M.: Slab2, a comprehensive subduction zone geometry model, Science, 362, 58–61, https://doi.org/10.1126/science.aat4723, 2018.
Heirman, K., De Batist, M., Charlet, F., Moernaut, J., Chapron, E., Brümmer, R., Pino, M., and Urrutia, R.: Detailed seismic stratigraphy of Lago Puyehue: Implications for the mode and timing of glacier retreat in the Chilean Lake District, J. Quat. Sci., 26, 665–674, https://doi.org/10.1002/jqs.1491, 2011.
Heirman, K., De Batist, M., Arnaud, F., and De Beaulieu, J. L.: Seismic stratigraphy of the late Quaternary sedimentary infill of Lac d'Armor (Kerguelen archipelago): A record of glacier retreat, sedimentary mass wasting and southern Westerly intensification, Antarct. Sci., 24, 608–618, https://doi.org/10.1017/S0954102012000466, 2012.
Heiri, O., Lotter, A. F., and Lemcke, G.: Loss on ignition as a method for estimating organic and carbonate content in sediments: reproducibility and comparability of results, J. Paleolimnol., 25, 101–110, https://doi.org/10.1023/A:1008119611481, 2001.
Henry, J. A.: Humid Climates, in: Encyclopedia of World Climatology, Springer Netherlands, 412–413, https://doi.org/10.1007/1-4020-3266-8_101, 2005.
Hervé, M. A.: Estudio geológico de la Falla Liquiñe-Reloncaví en el área de Liquiñe: Antecedentes de un movimiento transcurrente (Provincia de Valdivia), in: Primer Congreso Geologico Chileno, Santiago, Chile, 2–7 August 1976, B39–B56, 1976.
Hogg, A. G., Hua, Q., Blackwell, P. G., Niu, M., Buck, C. E., Guilderson, T. P., Heaton, T. J., Palmer, J. G., Reimer, P. J., Reimer, R. W., Turney, C. S. M., and Zimmerman, S. R. H.: SHCal13 Southern Hemisphere Calibration, 0–50,000 Years cal BP, Radiocarbon, 55, 1889–1903, https://doi.org/10.2458/azu_js_rc.55.16783, 2013.
Howarth, J. D., Fitzsimons, S. J., Norris, R. J., and Jacobsen, G. E.: Lake sediments record cycles of sediment flux driven by large earthquakes on the Alpine fault, New Zealand, Geology, 40, 1091–1094, https://doi.org/10.1130/G33486.1, 2012.
Howarth, J. D., Fitzsimons, S. J., Norris, R. J., and Jacobsen, G. E.: Lake sediments record high intensity shaking that provides insight into the location and rupture length of large earthquakes on the Alpine Fault, New Zealand, Earth Planet. Sci. Lett., 403, 340–351, https://doi.org/10.1016/j.epsl.2014.07.008, 2014.
Keefer, D. K.: Landslides caused by earthquakes, Bull. Geol. Soc. Am., 95, 406–421, https://doi.org/10.1130/0016-7606(1984)95<406:lcbe>2.0.co;2, 1984.
Kissel, C., Leau, H., and The Shipboard Scientific party: MD159-PACHIDERME-IMAGES XV, Cruise Report, 105 pp., https://doi.org/10.17600/7200010, 2007.
Kremer, K., Wirth, S. B., Reusch, A., Fäh, D., Bellwald, B., Anselmetti, F. S., Girardclos, S., and Strasser, M.: Lake-sediment based paleoseismology: Limitations and perspectives from the Swiss Alps, Quat. Sci. Rev., 168, 1–18, https://doi.org/10.1016/j.quascirev.2017.04.026, 2017.
Lazo, R. G.: Estudio de low daños de los terremotos del 21 y 22 de mayo de 1960, PhD thesis, Universidad de Chile, 427 pp., 2008.
Legrand, D., Barrientos, S., Bataille, K., Cembrano, J., and Pavez, A.: The fluid-driven tectonic swarm of Aysen Fjord, Chile (2007) associated with two earthquakes (Mw=6.1 and Mw=6.2) within the Liquiñe-Ofqui Fault Zone, Cont. Shelf Res., 31, 154–161, https://doi.org/10.1016/j.csr.2010.05.008, 2011.
Leithold, E. L., Wegmann, K. W., Bohnenstiehl, D. R., Joyner, C. N., and Pollen, A. F.: Repeated megaturbidite deposition in Lake Crescent, Washington, USA, triggered by Holocene ruptures of the Lake Creek-Boundary Creek fault system, Bull. Geol. Soc. Am., 131, 2039–2055, https://doi.org/10.1130/B35076.1, 2019.
Markgraf, V., Whitlock, C., and Haberle, S.: Vegetation and fire history during the last 18,000 cal yr B.P. in Southern Patagonia: Mallín Pollux, Coyhaique, Province Aisén (45° 41′30′′ S, 71° 50′30′′ W, 640 m elevation), Palaeogeogr. Palaeoclimatol. Palaeoecol., 254, 492–507, https://doi.org/10.1016/j.palaeo.2007.07.008, 2007.
Métois, M., Socquet, A., and Vigny, C.: Interseismic coupling, segmentation and mechanical behavior of the central Chile subduction zone, J. Geophys. Res.-Sol. Ea., 117, 16, https://doi.org/10.1029/2011JB008736, 2012.
Meyers, P. A. and Ishiwatari, R.: Lacustrine organic geochemistryman overview of indicators of organic matter sources and diagenesis in lake sediments, Org. Geochem., 20, 867–900, 1993.
Moernaut, J.: Time-dependent recurrence of strong earthquake shaking near plate boundaries: A lake sediment perspective, Earth Sci. Rev., 210, 103344, https://doi.org/10.1016/j.earscirev.2020.103344, 2020.
Moernaut, J. and De Batist, M.: Frontal emplacement and mobility of sublacustrine landslides: Results from morphometric and seismostratigraphic analysis, Mar. Geol., 285, 29–45, 2011.
Moernaut, J., De Batist, M., Charlet, F., Heirman, K., Chapron, E., Pino, M., Brümmer, R., and Urrutia, R.: Giant earthquakes in South-Central Chile revealed by Holocene mass-wasting events in Lake Puyehue, Sediment. Geol., 195, 239–256, https://doi.org/10.1016/j.sedgeo.2006.08.005, 2007.
Moernaut, J., Van Daele, M., Heirman, K., Fontijn, K., Strasser, M., Pino, M., Urrutia, R., and De Batist, M.: Lacustrine turbidites as a tool for quantitative earthquake reconstruction: New evidence for a variable rupture mode in south central Chile, J. Geophys. Res.-Sol. Ea., 119, 1607–1633, https://doi.org/10.1002/2013JB010738, 2014.
Molenaar, A., Moernaut, J., Wiemer, G., Dubois, N., and Strasser, M.: Earthquake Impact on Active Margins: Tracing Surficial Remobilization and Seismic Strengthening in a Slope Sedimentary Sequence, Geophys. Res. Lett., 46, 6015–6023, https://doi.org/10.1029/2019GL082350, 2019.
Monecke, K., Anselmetti, F. S., Becker, A., Sturm, M., and Giardini, D.: The record of historic earthquakes in lake sediments of Central Switzerland, Tectonophysics, 394, 21–40, https://doi.org/10.1016/j.tecto.2004.07.053, 2004.
Moreau, C., Caffy, I., Comby, C., Delqué-Količ, E., Dumoulin, J.-P., Hain, S., Quiles, A., Setti, V., Souprayen, C., Thellier, B., and Vincent, J.: Research and Development of the Artemis 14C AMS Facility: Status Report, Radiocarbon, 55, 331–337, https://doi.org/10.1017/s0033822200057441, 2013.
Moreno, P. I., Simi, E., Villa-Martínez, R. P., and Vilanova, I.: Early arboreal colonization, postglacial resilience of deciduous Nothofagus forests, and the Southern Westerly Wind influence in central-east Andean Patagonia, Quat. Sci. Rev., 218, 61–74, https://doi.org/10.1016/j.quascirev.2019.06.004, 2019.
Naranjo, J. A. and Stern, C. R.: Holocene explosive activity of Hudson Volcano, southern Andes, Bull. Volcanol., 59, 291–306, https://doi.org/10.1007/s004450050193, 1998.
Naranjo, J. A. and Stern, C. R.: Holocene tephrochronology of the southernmost part (42°30′–45° S) of the Andean Southern Volcanic Zone, Rev. Geol. Chile, 31, 225–240, https://doi.org/10.4067/S0716-02082004000200003, 2004.
Naranjo, J. A., Arenas, M., Clavero, J., and Muñoz, O.: Mass movement-induced tsunamis: Main effects during the Patagonian Fjordland seismic crisis in Aisén (45°25' S), Chile, Andean Geol., 36, 137–145, https://doi.org/10.4067/s0718-71062009000100011, 2009.
NASA JPL: NASA Shuttle Radar Topography Mission Global 1 arc second number, NASA EOSDIS Land Processes Distributed Active Archive Center [data set], https://doi.org/10.5067/MEaSUREs/SRTM/SRTMGL1N.003, 2013.
Ndiaye, M., Clerc, N., Gorin, G., Girardclos, S., and Fiore, J.: Lake Neuchâtel (Switzerland) seismic stratigraphic record points to the simultaneous Würmian deglaciation of the Rhône Glacier and Jura Ice Cap, Quat. Sci. Rev., 85, 1–19, https://doi.org/10.1016/j.quascirev.2013.11.017, 2014.
Pagani, M., Monelli, D., Weatherill, G., Danciu, L., Crowley, H., Silva, V., Henshaw, P., Butler, L., Nastasi, M., Panzeri, L., Simionato, M., and Vigano, D.: Openquake engine: An open hazard (and risk) software for the global earthquake model, Seismol. Res. Lett., 85, 692–702, https://doi.org/10.1785/0220130087, 2014.
Paterson, G. A. and Heslop, D.: New methods for unmixing sediment grain size data, Geochem. Geophy. Geosy., 16, 4494–4506, https://doi.org/10.1002/2015GC006070, 2015.
Piret, L., Bertrand, S., Kissel, C., De Pol-Holz, R., Tamayo Hernando, A., and Van Daele, M.: First evidence of a mid-Holocene earthquake-triggered megaturbidite south of the Chile Triple Junction, Sediment. Geol., 375, 120–133, https://doi.org/10.1016/j.sedgeo.2018.01.002, 2018.
Praet, N., Moernaut, J., Van Daele, M., Boes, E., Haeussler, P. J., Strupler, M., Schmidt, S., Loso, M. G., and De Batist, M.: Paleoseismic potential of sublacustrine landslide records in a high-seismicity setting (south-central Alaska), Mar. Geol., 384, 103–119, https://doi.org/10.1016/j.margeo.2016.05.004, 2017.
Pribyl, D. W.: A critical review of the conventional SOC to SOM conversion factor, Geoderma, 156, 75–83, https://doi.org/10.1016/j.geoderma.2010.02.003, 2010.
Rein, B. and Sirocko, F.: In-situ reflectance spectroscopy – analysing techniques for high-resolution pigment logging in sediment cores, Int. J. Earth Sci., 91, 950–954, https://doi.org/10.1007/s00531-002-0264-0, 2002.
Rodrìguez, C. E., Bommer, J. J., and Chandler, R. J.: Earthquake-induced landslides: 1980–1997, Soil Dyn. Earthq. Eng., 18, 325–346, https://doi.org/10.1016/S0267-7261(99)00012-3, 1999.
Russo, R. M., VanDecar, J. C., Comte, D., Mocanu, V. I., Gallego, A., and Murdie, R. E.: Subduction of the Chile Ridge: Upper mantle structure and flow, GSA Today, 20, 4–10, https://doi.org/10.1130/GSATG61A.1, 2010.
Sabatier, P., Moernaut, J., Bertrand, S., Van Daele, M., Kremer, K., Chaumillon, E., and Arnaud, F.: A Review of Event Deposits in Lake Sediments, Quaternary, 5, 34, https://doi.org/10.3390/quat5030034, 2022.
Schnellmann, M., Anselmetti, F. S., Giardini, D., Mckenzie, J. A., and Ward, S. N.: Prehistoric earthquake history revealed by lacustrine slump deposits, Geology, 30, 1131–1134, 2002.
Schnellmann, M., Anselmetti, F. S., Giardini, D., and McKenzie, J. A.: Mass movement-induced fold-and-thrust belt structures in unconsolidated sediments in Lake Lucerne (Switzerland), Sedimentology, 52, 271–289, https://doi.org/10.1111/j.1365-3091.2004.00694.x, 2005.
Sepúlveda, S. A., Serey, A., Lara, M., Pavez, A., and Rebolledo, S.: Landslides induced by the April 2007 Aysén Fjord earthquake, Chilean Patagonia, Landslides, 7, 483–492, https://doi.org/10.1007/s10346-010-0203-2, 2010.
SERNAGEOMIN: Mapa Geológico de Chile: versión digital. Servicio Nacional de Geología y Minería, Publicación Geológica Digital, No. 4 (CD-ROM, versión 1.0, 2003), Santiago, 2003.
Serva, L., Vittori, E., Comerci, V., Esposito, E., Guerrieri, L., Michetti, A. M., Mohammadioun, B., Mohammadioun, G. C., Porfido, S., and Tatevossian, R. E.: Earthquake Hazard and the Environmental Seismic Intensity (ESI) Scale, Pure Appl. Geophys., 173, 1479–1515, https://doi.org/10.1007/s00024-015-1177-8, 2016.
Shanahan, T. M., McKay, N., Overpeck, J. T., Peck, J. A., Scholz, C., Heil, C. W., and King, J.: Spatial and temporal variability in sedimentological and geochemical properties of sediments from an anoxic crater lake in West Africa: Implications for paleoenvironmental reconstructions, Palaeogeogr. Palaeocl., 374, 96–109, https://doi.org/10.1016/j.palaeo.2013.01.008, 2013.
Stern, C. R.: Active Andean volcanism: its geologic and tectonic setting, Rev. Geol. Chile, 31, 161–206, https://doi.org/10.4067/S0716-02082004000200001, 2004.
St.-Onge, G., Mulder, T., Piper, D. J. W., Hillaire-Marcel, C., and Stoner, J. S.: Earthquake and flood-induced turbidites in the Saguenay Fjord (Québec): A Holocene paleoseismicity record, Quat. Sci. Rev., 23, 283–294, https://doi.org/10.1016/j.quascirev.2003.03.001, 2004.
Strasser, M., Stegmann, S., Bussmann, F., Anselmetti, F. S., Rick, B., and Kopf, A.: Quantifying subaqueous slope stability during seismic shaking: Lake Lucerne as model for ocean margins, Mar. Geol., 240, 77–97, https://doi.org/10.1016/j.margeo.2007.02.016, 2007.
Thomson, S. N.: Late Cenozoic geomorphic and tectonic evolution of the Patagonian Andes between latitudes 42° S and 46° S: An appraisal based on fission-track results from the transpressional intra-arc Liquiñe-Ofqui fault zone, GSA Bulletin, 114, 1159–1173, 2002.
Trachsel, M., Grosjean, M., Schnyder, D., Kamenik, C., and Rein, B.: Scanning reflectance spectroscopy (380–730 nm): A novel method for quantitative high-resolution climate reconstructions from minerogenic lake sediments, J. Paleolimnol., 44, 979–994, https://doi.org/10.1007/s10933-010-9468-7, 2010.
USGS: Earthquake Hazards Program – Search Earthquake Catalog: https://earthquake.usgs.gov/earthquakes/search/, last access: 22 September 2023.
Van Daele, M., Moernaut, J., Doom, L., Boes, E., Fontijn, K., Heirman, K., Vandoorne, W., Hebbeln, D., Pino, M., Urrutia, R., Brümmer, R., and De Batist, M.: A comparison of the sedimentary records of the 1960 and 2010 great Chilean earthquakes in 17 lakes: Implications for quantitative lacustrine palaeoseismology, Sedimentology, 62, 1466–1496, https://doi.org/10.1111/sed.12193, 2015.
Van Daele, M., Bertrand, S., Meyer, I., Moernaut, J., Vandoorne, W., Siani, G., Tanghe, N., Ghazoui, Z., Pino, M., Urrutia, R., and De Batist, M.: Late Quaternary evolution of Lago Castor (Chile, 45.6° S): Timing of the deglaciation in northern Patagonia and evolution of the southern westerlies during the last 17 kyr, Quat. Sci. Rev., 133, 130–146, https://doi.org/10.1016/j.quascirev.2015.12.021, 2016.
Van Daele, M., Araya-Cornejo, C., Pille, T., Vanneste, K., Moernaut, J., Schmidt, S., Kempf, P., Meyer, I., and Cisternas, M.: Distinguishing intraplate from megathrust earthquakes using lacustrine turbidites, Geology, 47, 127–130, https://doi.org/10.1130/G45662.1, 2019.
Van Daele, M., Haeussler, P. J., Witter, R. C., Praet, N., and De Batist, M.: The Sedimentary Record of the 2018 Anchorage Earthquake in Eklutna Lake, Alaska: Calibrating the Lacustrine Seismograph, Seismol. Res. Lett., 91, 126–141, https://doi.org/10.1785/0220190204, 2020.
Vandekerkhove, E., Van Daele, M., Praet, N., Cnudde, V., Haeussler, P. J., and De Batist, M.: Flood-triggered versus earthquake-triggered turbidites: A sedimentological study in clastic lake sediments (Eklutna Lake, Alaska), Sedimentology, 67, 364–389, https://doi.org/10.1111/sed.12646, 2020.
Vanneste, K., Wils, K., and Van Daele, M.: Probabilistic Evaluation of Fault Sources Based on Paleoseismic Evidence From Mass-Transport Deposits: The Example of Aysén Fjord, Chile, J. Geophys. Res.-Sol. Ea., 123, 9842–9865, https://doi.org/10.1029/2018JB016289, 2018.
Van Rensbergen, P., De Batist, M., Beck, Ch., and Manalt, F.: High-resolution seismic stratigraphy of late Quaternary fill of Lake Annecy (northwestern Alps): evolution from glacial to interglacial sedimentary processes, Sediment. Geol., 117, 71–96, 1998.
Vervoort, M.: Grainsize data MD07-3117_IX, figshare [data set], https://doi.org/10.6084/m9.figshare.27087505.v1, 2024a.
Vervoort, M.: Geochemistry data MD07-3117_IX, figshare [data set], https://doi.org/10.6084/m9.figshare.27087523.v1, 2024b.
Vervoort, M.: Bathymetry map Lago Pollux, figshare [data set], https://doi.org/10.6084/m9.figshare.27100579.v1, 2024c.
Wang, K., Hu, Y., Bevis, M., Kendrick, E., Robert, S., Vargas, R. B., and Lauría, E.: Crustal motion in the zone of the 1960 Chile earthquake: Detangling earthquake-cycle deformation and forearc-sliver translation, Geochem. Geophy. Geosy., 8, 14, https://doi.org/10.1029/2007GC001721, 2007.
Weller, D., Miranda, C. G., Moreno, P. I., Villa-Martínez, R., and Stern, C. R.: The large late-glacial Ho eruption of the Hudson Volcano, southern Chile, Bull. Volcanol., 76, 831, https://doi.org/10.1007/s00445-014-0831-9, 2014.
Weller, D. J., De Porras, M. E., Maldonado, A., Méndez, C., and Stern, C. R.: New age controls on the tephrochronology of the southernmost Andean Southern Volcanic Zone, Chile, Quat. Res., 91, 1–15, https://doi.org/10.1017/qua.2018.81, 2018.
Wells, D. and Coppersmith, K. J.: New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement, B. Seismol. Soc. Am., 84, 974–1002, 1994.
Wilhelm, B., Nomade, J., Crouzet, C., Litty, C., Sabatier, P., Belle, S., Rolland, Y., Revel, M., Courboulex, F., Arnaud, F., and Anselmetti, F. S.: Quantified sensitivity of small lake sediments to record historic earthquakes: Implications for paleoseismology, J. Geophys. Res.-Earth, 121, 2–16, https://doi.org/10.1002/2015JF003644, 2016.
Wils, K., Van Daele, M., Lastras, G., Kissel, C., Lamy, F., and Siani, G.: Holocene Event Record of Aysén Fjord (Chilean Patagonia): An Interplay of Volcanic Eruptions and Crustal and Megathrust Earthquakes, J. Geophys. Res.-Sol. Ea., 123, 324–343, https://doi.org/10.1002/2017JB014573, 2018.
Wils, K., Van Daele, M., Kissel, C., Moernaut, J., Schmidt, S., Siani, G., and Lastras, G.: Seismo-Turbidites in Aysén Fjord (Southern Chile) Reveal a Complex Pattern of Rupture Modes Along the 1960 Megathrust Earthquake Segment, J. Geophys. Res.-Sol. Ea., 125, 1–23, https://doi.org/10.1029/2020JB019405, 2020.
Short summary
This study identifies a prehistoric earthquake around 4400 years ago near the city of Coyhaique (Aysén Region, Chilean Patagonia) and illustrates the potential seismic hazard in the region. We found deposits in lakes and a fjord that can be related to subaquatic and onshore landslides, all with a similar age, indicating that they were most likely caused by an earthquake. Through modeling we found that this was an earthquake of magnitude 6.3 to 7.0 on a fault near the city of Coyhaique.
This study identifies a prehistoric earthquake around 4400 years ago near the city of Coyhaique...
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