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| Gutscher, Marc-andre; Royer, Jean-yves; Graindorge, David; Murphy, Shane; Klingelhoefer, Frauke; Aiken, Chastity; Cattaneo, Antonio; Barreca, Giovanni; Quetel, Lionel; Riccobene, Giorgio; Petersen, Florian; Urlaub, Morelia; Krastel, Sebastian; Gross, Felix; Kopp, Heidrun; Margheriti, Lucia; Beranzoli, Laura. |
| Laser reflectometry (BOTDR), commonly used for structural health monitoring (bridges, dams, etc.), will for the first time be applied to study movements of an active fault on the seafloor 25 km offshore Catania Sicily. The goal of the European funded FOCUS project (ERC Advanced Grant) is to connect a 6-km long strain cable to the EMSO seafloor observatory in 2100 m water depth. Laser observations will be calibrated by seafloor geodetic instruments and seismological stations. A long-term goal is the development of dual-use telecom cables with industry partners. |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00493/60430/63872.pdf |
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| Aiken, Chastity; Wessels, Richard; Cormier, Marie-hélène; Klingelhoefer, Frauke; Battani, Anne; Rolandone, Frédérique; Roest, Walter; Boisson, Dominique; Guerrier, Kelly; Momplaisir, Roberte; Ellouz-zimmerman, Nadine. |
| The Haiti region – bounded by two strike-slip faults expressed both onshore and offshore – offers a unique opportunity for an amphibious drilling project. The east–west (EW)-striking, left lateral strike-slip Oriente–Septentrional fault zone and Enriquillo–Plantain Garden fault zone bounding Haiti have similar slip rates and also define the northern and southern boundaries of the Gonâve Microplate. However, it remains unclear how these fault systems terminate at the eastern boundary of that microplate. From a plate tectonic perspective, the Enriquillo–Plantain Garden fault zone can be expected to act as an inactive fracture zone bounding the Cayman spreading system, but, surprisingly, this fault has been quite active during the last 500 years. Overall,... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00662/77402/79042.pdf |
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| Aiken, Chastity; Meng, Xiaofeng; Hardebeck, Jeanne. |
| The Geysers geothermal field is well known for being susceptible to dynamic triggering of earthquakes by large distant earthquakes, owing to the introduction of fluids for energy production. Yet, it is unknown if dynamic triggering of earthquakes is ‘predictable’ or whether dynamic triggering could lead to a potential hazard for energy production. In this paper, our goal is to investigate the characteristics of triggering and the physical conditions that promote triggering to determine whether or not triggering is in anyway foreseeable. We find that, at present, triggering in The Geysers is not easily ‘predictable’ in terms of when and where based on observable physical conditions. However, triggered earthquake magnitude positively correlates with peak... |
| Tipo: Text |
Palavras-chave: Dynamic triggering; Template matching; Earthquake; Stress changes; The Geysers. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00425/53626/54547.pdf |
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| Frohlich, Cliff; Hayward, Chris; Rosenblit, Julia; Aiken, Chastity; Hennings, Peter; Savvaidis, Alexandros; Lemons, Casee; Horne, Elizabeth; Walter, Jacob I.; Deshon, Heather R.. |
| In recent years, numerous small earthquakes have occurred near the town of Pecos in West Texas; however, when this activity began and whether it was caused by increased petroleum industry activity has been uncertain because prior to 2017 there were few permanent seismograph stations in the region. We identify and locate earthquakes using data recorded since 2000 at TXAR, a sensitive 10‐station seismic array situated about 240 km south of Pecos. We thus show that in 2007 one earthquake occurred near Pecos, in 2009 several more occurred, and subsequently activity has increased considerably, with more than 2000 events identified in 2017. A time‐of‐day and year‐by‐year analysis identifies geographic areas in West Texas where events are likely to be natural... |
| Tipo: Text |
Palavras-chave: Induced earthquakes; Seismic array analysis; Earthquakes and public policy. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00590/70240/68263.pdf |
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