research data . Dataset . 2020

Shallow seismicity and the classification of structures in the Lau back-arc basin

Baxter, Alan T; Hannington, Mark D; Stewart, Margaret S; Emberley, Justin M; Breker, Kaitlyn; Kr��tschell, Anna; Petersen, Sven; Brandl, Philipp A; Klischies, Meike; Mensing, Rebecca; ...
Open Access English
  • Published: 01 Jan 2020
  • Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
Abstract
We compared Centroid Moment Tensors (CMTs), calculated for large (Mw >5), shallow (<30 km) seismic events to the orientations of seafloor lineaments (n = 4000) mapped throughout the Lau Basin, in the SW Pacific. Ship-based multibeam was combined with vertical gravity gradient data to provide comprehensive coverage to create the lineament map. By comparing the possible focal planes of the CMTs to the orientations of the lineaments, the most likely fault plane solutions were selected, thus classifying the faults and establishing the nature of the highly variable stress regimes in the basin. We resolved the strike, dip and dip direction of 308 faults, and cla...
Persistent Identifiers
Subjects
free text keywords: back-arc basins, CMTs, earthquake, Lau Basin, seismicity, Event label, LONGITUDE, Longitude, error, LATITUDE, Latitude, error, Coordinate uncertainty, Hypocentre depth, Hypocentre depth, error, DATE/TIME, Time, standard error, Moment magnitude, Surface wave magnitude, Body wave magnitude, Strike, Dip, Rake, Moment tensor Mrr, Moment tensor Mtt, Moment tensor Mpp, Moment tensor Mrt, Moment tensor Mrp, Moment tensor Mtp, Moment tensor Mrr, error, Moment tensor Mtt, error, Moment tensor Mpp, error, Moment tensor Mrt, error, Moment tensor Mrp, error, Moment tensor Mtp, error, Scalar moment, Principle axis, T, Principle axis, T, azimuth, Principle axis, T, plunge, Principle axis, N, Principle axis, N, azimuth, Principle axis, N, plunge, Principle axis, P, Principle axis, P, azimuth, Principle axis, P, plunge, Longitude 2, Latitude 2, Body waves, stations, Body waves, components, Body waves, shortest period, Surface waves, stations, Surface, components, Surface waves, shortest period, Mantle waves, stations, Mantle waves, components, Mantle waves, shortest period, Comment, Type, Location, Time Stamp, Area/locality, Global Centroid Moment Tensor Project (GCMT)
Related Organizations
Funded by
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
,
NSF| Facility Support: The Global CMT Project
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0824694
  • Funding stream: Directorate for Geosciences | Division of Earth Sciences
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