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Lindner, Mike, Rietbrock, Andreas, Bie, Lidong 
ORCID: https://orcid.org/0000-0002-8130-7084, Gao, Ya-jian, Goes, Saskia and Frietsch, Michael
(2024)
Complex Martinique intermediate-depth earthquake reactivates early Atlantic break-up structures.
Geophysical Research Letters, 51 (11).
ISSN 0094-8276
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Abstract
Earthquakes that rupture several faults occur frequently within the shallow lithosphere but are rarely observed for intermediate-depth events (70–300 km). On 29 November 2007, the Mw7.4 Martinique earthquake struck the Lesser Antilles Island Arc near the deep end of the Wadati-Benioff-Zone. The sparse regional seismic network of 2007 previously hampered a detailed examination of this unusually complex event. Here, we combine seismic data from different studies with regional moment tensor inversion results and 3D full-waveform modeling. We show that the earthquake is a doublet consisting of dip-slip and strike-slip motion along two oblique structures, both activated under extensional stress along the strike of the slab. Comparison with tectonic reconstructions suggests that the earthquake ruptured along a re-activated ridge-transform segment of the subducted Proto-Caribbean spreading ridge. The unprecedented resolution of the source process highlights the influence of pre-existing structures on localizing slab deformation also at intermediate-depth.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding information: This work was funded under Natural Environment Research Council Grant NE/K010611/1 and by the Geophysical Institute at KIT. |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Geosciences |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 12 Jun 2024 09:30 |
| Last Modified: | 17 Jun 2024 09:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/95591 |
| DOI: | 10.1029/2024GL108922 |
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