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  Evidencing fluid migration of the crust during the earthquake cycle by using 1D-magnetotelluric monitoring

Vargas Jimenez, C. A., Caneva, A., Solano, J. M., Gulisano, A. M., Villalobos, J. (2023): Evidencing fluid migration of the crust during the earthquake cycle by using 1D-magnetotelluric monitoring, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0088

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016453 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016453_2
Genre: Konferenzbeitrag

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 Urheber:
Vargas Jimenez, Carlos Alberto1, Autor
Caneva, Alexander1, Autor
Solano, Juan Manuel1, Autor
Gulisano, Adriana M.1, Autor
Villalobos, Jaime1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: We apply multi-temporal 1D-magnetotelluric (MT) surveys to identify space-time anomalies of apparent resistivity in the upper lithosphere in the Antarctic Peninsula (border between the Antarctic and the Shetland plates). We use time series over several weeks of the natural Earth's electric and magnetic fields registered at one MT station of the Universidad Nacional de Colombia (RSUNAL) located at Seymour – Marambio Island, Antarctica. We associate resistivity anomalies with contrasting earthquake activity. Anomalies of were detected almost simultaneously with the beginning of a seismic crisis in the Bransfield Strait, south of King George Island (approx. 85.000 events were reported close to the Orca submarine volcano, with focal depths < 20 km and mb < 6.9). We explain the origin of these anomalies in response to fluid migration near the place of the fractures linked with the seismic swarm, which could promote disturbances of the pore pressure field that reached some hundreds of km away.

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.57757/IUGG23-0088
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Veranstaltung

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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