Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes
Abstract The rupture behavior of large oceanic strike‐slip earthquakes remains largely unresolved using seismic signals recorded thousands of kilometers away from the source area. Large submarine earthquakes, however, generate hydroacoustic T‐waves propagating through the ocean over long distances....
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL112891 |
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| _version_ | 1832593447074136064 |
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| author | Guilherme W. S. deMelo Ingo Grevemeyer Dietrich Lange Dirk Metz Heidrun Kopp |
| author_facet | Guilherme W. S. deMelo Ingo Grevemeyer Dietrich Lange Dirk Metz Heidrun Kopp |
| author_sort | Guilherme W. S. deMelo |
| collection | DOAJ |
| description | Abstract The rupture behavior of large oceanic strike‐slip earthquakes remains largely unresolved using seismic signals recorded thousands of kilometers away from the source area. Large submarine earthquakes, however, generate hydroacoustic T‐waves propagating through the ocean over long distances. Here, we show that these T‐waves recorded at regional distances on the Ascension hydrophone array of the International Monitoring System can provide critical information on the earthquake location and rupture behavior. We use recordings from 47 events in oceanic transform faults, ranging in magnitude from 5.6 ≤ Mw ≤ 7.1, to investigate the rupture processes. We find that most strike‐slip earthquakes show unilateral rupture behavior, while a few larger events were more complex. Furthermore, earthquakes in oceanic transforms have longer ruptures than events of the same magnitude in continental faults. We argue that differences in the scaling relation of oceanic and continental strike‐slip earthquakes support a lower rigidity in the oceanic lithosphere caused by hydration. |
| format | Article |
| id | doaj-art-0305ef19d93f4448a0a08bbfd600fdec |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-0305ef19d93f4448a0a08bbfd600fdec2025-01-20T13:05:57ZengWileyGeophysical Research Letters0094-82761944-80072025-01-01521n/an/a10.1029/2024GL112891Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault EarthquakesGuilherme W. S. deMelo0Ingo Grevemeyer1Dietrich Lange2Dirk Metz3Heidrun Kopp4GEOMAR Helmholtz Centre of Ocean Research Kiel Kiel GermanyGEOMAR Helmholtz Centre of Ocean Research Kiel Kiel GermanyGEOMAR Helmholtz Centre of Ocean Research Kiel Kiel GermanyPreparatory Commission for the Comprehensive Nuclear‐Test‐Ban Treaty Organization (CTBTO) Vienna AustriaGEOMAR Helmholtz Centre of Ocean Research Kiel Kiel GermanyAbstract The rupture behavior of large oceanic strike‐slip earthquakes remains largely unresolved using seismic signals recorded thousands of kilometers away from the source area. Large submarine earthquakes, however, generate hydroacoustic T‐waves propagating through the ocean over long distances. Here, we show that these T‐waves recorded at regional distances on the Ascension hydrophone array of the International Monitoring System can provide critical information on the earthquake location and rupture behavior. We use recordings from 47 events in oceanic transform faults, ranging in magnitude from 5.6 ≤ Mw ≤ 7.1, to investigate the rupture processes. We find that most strike‐slip earthquakes show unilateral rupture behavior, while a few larger events were more complex. Furthermore, earthquakes in oceanic transforms have longer ruptures than events of the same magnitude in continental faults. We argue that differences in the scaling relation of oceanic and continental strike‐slip earthquakes support a lower rigidity in the oceanic lithosphere caused by hydration.https://doi.org/10.1029/2024GL112891 |
| spellingShingle | Guilherme W. S. deMelo Ingo Grevemeyer Dietrich Lange Dirk Metz Heidrun Kopp Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes Geophysical Research Letters |
| title | Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes |
| title_full | Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes |
| title_fullStr | Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes |
| title_full_unstemmed | Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes |
| title_short | Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes |
| title_sort | relationship between rupture length and magnitude of oceanic transform fault earthquakes |
| url | https://doi.org/10.1029/2024GL112891 |
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