Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring
We applied multi–temporal 1D magnetotelluric (MT) surveys to identify space–time anomalies of apparent resistivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ρ</mi><mi&...
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MDPI AG
2023-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/4/2683 |
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| author | Carlos A. Vargas Alexander Caneva Juan M. Solano Adriana M. Gulisano Jaime Villalobos |
| author_facet | Carlos A. Vargas Alexander Caneva Juan M. Solano Adriana M. Gulisano Jaime Villalobos |
| author_sort | Carlos A. Vargas |
| collection | DOAJ |
| description | We applied multi–temporal 1D magnetotelluric (MT) surveys to identify space–time anomalies of apparent resistivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ρ</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula>) in the upper lithosphere in the Antarctic Peninsula (the border between the Antarctic and the Shetland plates). We used 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 associated resistivity anomalies with contrasting earthquake activity. Anomalies of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ρ</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula> were detected almost simultaneously with the beginning of a seismic crisis in the Bransfield Strait, south of King George Island (approximately 85.000 events were reported close to the Orca submarine volcano, with focal depths < 20 km and M<sub>WW</sub> < 6.9). We explained 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. |
| first_indexed | 2024-03-11T09:10:48Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:10:48Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-307d8a59e28a4e02a218542f3d759c032023-11-16T18:59:18ZengMDPI AGApplied Sciences2076-34172023-02-01134268310.3390/app13042683Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric MonitoringCarlos A. Vargas0Alexander Caneva1Juan M. Solano2Adriana M. Gulisano3Jaime Villalobos4Department of Geosciences, Universidad Nacional de Colombia, Bogotá 111321, ColombiaDepartment of Geosciences, Universidad Nacional de Colombia, Bogotá 111321, ColombiaDepartment of Geosciences, Universidad Nacional de Colombia, Bogotá 111321, ColombiaInstituto Antártico Argentino, Dirección Nacional del Antártico, Buenos Aires B1650HMK, ArgentinaDepartment of Physics, Universidad Nacional de Colombia, Bogotá 111321, ColombiaWe applied multi–temporal 1D magnetotelluric (MT) surveys to identify space–time anomalies of apparent resistivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ρ</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula>) in the upper lithosphere in the Antarctic Peninsula (the border between the Antarctic and the Shetland plates). We used 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 associated resistivity anomalies with contrasting earthquake activity. Anomalies of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>ρ</mi><mi>a</mi></msub></mrow></semantics></math></inline-formula> were detected almost simultaneously with the beginning of a seismic crisis in the Bransfield Strait, south of King George Island (approximately 85.000 events were reported close to the Orca submarine volcano, with focal depths < 20 km and M<sub>WW</sub> < 6.9). We explained 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.https://www.mdpi.com/2076-3417/13/4/2683apparent resistivityearthquakesmagnetotelluricselectromagnetic anomaliesAntarctic PeninsulaSeymour–Marambio Island |
| spellingShingle | Carlos A. Vargas Alexander Caneva Juan M. Solano Adriana M. Gulisano Jaime Villalobos Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring Applied Sciences apparent resistivity earthquakes magnetotellurics electromagnetic anomalies Antarctic Peninsula Seymour–Marambio Island |
| title | Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring |
| title_full | Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring |
| title_fullStr | Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring |
| title_full_unstemmed | Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring |
| title_short | Evidencing Fluid Migration of the Crust during the Seismic Swarm by Using 1D Magnetotelluric Monitoring |
| title_sort | evidencing fluid migration of the crust during the seismic swarm by using 1d magnetotelluric monitoring |
| topic | apparent resistivity earthquakes magnetotellurics electromagnetic anomalies Antarctic Peninsula Seymour–Marambio Island |
| url | https://www.mdpi.com/2076-3417/13/4/2683 |
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