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Baxter, Alan T; Hannington, Mark D; Stewart, Margaret S; Emberley, Justin M; Breker, Kaitlyn; Krätschell, Anna; Petersen, Sven; Brandl, Philipp A; Klischies, Meike; Mensing, Rebecca; Anderson, Melissa O (2020): Shallow seismicity and the classification of structures in the Lau back-arc basin. PANGAEA, https://doi.org/10.1594/PANGAEA.913797

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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 classified 258 additional structures by fault type. The majority of the table was data downloaded from the Global Centroid Moment Tensor (GCMT) database (www.globalcmt.org: accessed October 2018). For more details about the column headers consult the GCMT database website. New data from this study include the latitude and longitude error estimates (in meters), the classified faults (column: 'fault_type'), and the stress domain (column: 'stress_domain'), allocated to each of the classified faults.
Keyword(s):
back-arc basins; CMTs; earthquake; Lau Basin; seismicity
Supplement to:
Baxter, Alan T; Hannington, Mark D; Stewart, Margaret S; Emberley, Justin M; Breker, Kaitlyn; Krätschell, Anna; Petersen, S; Brandl, Philipp A; Klischies, Meike; Mensing, Rebecca; Anderson, Melissa O (accepted): Shallow seismicity and the classification of structures in the Lau back-arc basin. Geochemistry, Geophysics, Geosystems, https://doi.org/10.1029/2020GC008924
Related to:
Dziewonski, A M; Chou, T-A; Woodhouse, J H (1981): Determination of earthquake source parameters from waveform data for studies of global and regional seismicity. Journal of Geophysical Research: Solid Earth, 86(B4), 2825-2852, https://doi.org/10.1029/JB086iB04p02825
Ekström, G; Nettles, M; Dziewonski, A M (2012): The global CMT project 2004–2010: Centroid-moment tensors for 13,017 earthquakes. Physics of The Earth and Planetary Interiors, 200-201, 1-9, https://doi.org/10.1016/j.pepi.2012.04.002
Source data set:
Ekström, G; Nettles, M: Global CMT database - download from October 2018. Lamont-Doherty Earth Observatory of Colombia University, New York, https://www.globalcmt.org
Coverage:
Median Latitude: -17.075910 * Median Longitude: -176.131561 * South-bound Latitude: -26.600000 * West-bound Longitude: -179.990000 * North-bound Latitude: -14.000000 * East-bound Longitude: -173.140000
Date/Time Start: 1977-01-17T00:04:38 * Date/Time End: 2017-12-16T00:05:40
Event(s):
B010186B * Latitude: -17.810000 * Longitude: -174.430000 * Date/Time: 1986-01-01T00:39:21
B010285E * Latitude: -14.640000 * Longitude: -175.370000 * Date/Time: 1985-01-02T00:29:27
B010484C * Latitude: -15.190000 * Longitude: -174.620000 * Date/Time: 1984-01-04T00:00:11
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventBaxter, Alan Tsource: Global Centroid Moment Tensor Database
2LONGITUDELongitudeBaxter, Alan TGeocode – source: Global Centroid Moment Tensor Database
3Longitude, errorLongitude eBaxter, Alan Tsource: Global Centroid Moment Tensor Database
4LATITUDELatitudeBaxter, Alan TGeocode – source: Global Centroid Moment Tensor Database
5Latitude, errorLatitude eBaxter, Alan Tsource: Global Centroid Moment Tensor Database
6Coordinate uncertaintyCoord uncmBaxter, Alan TLatitude error, 1rad error
7Coordinate uncertaintyCoord uncmBaxter, Alan TLongitude error, 1rad error
8Coordinate uncertaintyCoord uncmBaxter, Alan TLatitude error, 2rad error
9Coordinate uncertaintyCoord uncmBaxter, Alan TLongitude error, 2rad error
10Hypocentre depthHCDkmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
11Hypocentre depth, errorHCD errkmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
12DATE/TIMEDate/TimeBaxter, Alan TGeocode – source: Global Centroid Moment Tensor Database
13Time, standard errorTime std e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
14Moment magnitudeMwBaxter, Alan T
15Surface wave magnitudeMsBaxter, Alan Tsource: Global Centroid Moment Tensor Database
16Body wave magnitudembBaxter, Alan Tsource: Global Centroid Moment Tensor Database
17StrikeStrikedegBaxter, Alan TStrike1; source: Global Centroid Moment Tensor Database
18DipDipdegBaxter, Alan TDip1; source: Global Centroid Moment Tensor Database
19RakeRakedegBaxter, Alan TRake1; source: Global Centroid Moment Tensor Database
20StrikeStrikedegBaxter, Alan TStrike2; source: Global Centroid Moment Tensor Database
21DipDipdegBaxter, Alan TDip2; source: Global Centroid Moment Tensor Database
22RakeRakedegBaxter, Alan TRake2; source: Global Centroid Moment Tensor Database
23Moment tensor MrrMrr1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
24Moment tensor MttMtt1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
25Moment tensor MppMpp1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
26Moment tensor MrtMrt1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
27Moment tensor MrpMrp1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
28Moment tensor MtpMtp1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
29Moment tensor Mrr, errorMrr e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
30Moment tensor Mtt, errorMtt e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
31Moment tensor Mpp, errorMpp e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
32Moment tensor Mrt, errorMrt e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
33Moment tensor Mrp, errorMrp e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
34Moment tensor Mtp, errorMtp e±Baxter, Alan Tsource: Global Centroid Moment Tensor Database
35Scalar momentSc M1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
36Principle axis, TPa T1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
37Principle axis, T, azimuthPa T azimdegBaxter, Alan Tsource: Global Centroid Moment Tensor Database
38Principle axis, T, plungePa T plungedegBaxter, Alan Tsource: Global Centroid Moment Tensor Database
39Principle axis, NPa N1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
40Principle axis, N, azimuthPa N azimdegBaxter, Alan Tsource: Global Centroid Moment Tensor Database
41Principle axis, N, plungePa N plungedegBaxter, Alan Tsource: Global Centroid Moment Tensor Database
42Principle axis, PPa P1018 dyn*cmBaxter, Alan Tsource: Global Centroid Moment Tensor Database
43Principle axis, P, azimuthPa P azimdegBaxter, Alan Tsource: Global Centroid Moment Tensor Database
44Principle axis, P, plungePa P plungedegBaxter, Alan Tsource: Global Centroid Moment Tensor Database
45Longitude 2Longitude 2Baxter, Alan TReference; source: Global Centroid Moment Tensor Database
46Latitude 2Latitude 2Baxter, Alan TReference; source: Global Centroid Moment Tensor Database
47Hypocentre depthHCDkmBaxter, Alan TReference; source: Global Centroid Moment Tensor Database
48DATE/TIMEDate/TimeBaxter, Alan TGeocode – Date/time reference; source: Global Centroid Moment Tensor Database
49DATE/TIMEDate/TimeBaxter, Alan TGeocode – Date/time Reference 2; source: Global Centroid Moment Tensor Database
50Body waves, stationsBw s#Baxter, Alan Tsource: Global Centroid Moment Tensor Database
51Body waves, componentsBw c#Baxter, Alan Tsource: Global Centroid Moment Tensor Database
52Body waves, shortest periodBw psBaxter, Alan Tsource: Global Centroid Moment Tensor Database
53Surface waves, stationsSw s#Baxter, Alan Tsource: Global Centroid Moment Tensor Database
54Surface, componentsSw c#Baxter, Alan Tsource: Global Centroid Moment Tensor Database
55Surface waves, shortest periodSw psBaxter, Alan Tsource: Global Centroid Moment Tensor Database
56Mantle waves, stationsMw s#Baxter, Alan Tsource: Global Centroid Moment Tensor Database
57Mantle waves, componentsMw c#Baxter, Alan Tsource: Global Centroid Moment Tensor Database
58Mantle waves, shortest periodMw psBaxter, Alan Tsource: Global Centroid Moment Tensor Database
59CommentCommentBaxter, Alan TCentroid moment tensor version; source: Global Centroid Moment Tensor Database
60TypeTypeBaxter, Alan TCentroid moment tensor type; source: Global Centroid Moment Tensor Database
61CommentCommentBaxter, Alan TDepth inversion; source: Global Centroid Moment Tensor Database
62LocationLocationBaxter, Alan TGeographic location; source: Global Centroid Moment Tensor Database
63LocationLocationBaxter, Alan THypocenter; source: Global Centroid Moment Tensor Database
64Time StampTime StampBaxter, Alan TCentroid moment tensor time stamp; source: Global Centroid Moment Tensor Database
65CommentCommentBaxter, Alan TMoment rat; source: Global Centroid Moment Tensor Database
66CommentCommentBaxter, Alan TMoment r1; source: Global Centroid Moment Tensor Database
67CommentCommentBaxter, Alan TFocal mechanism; source: Global Centroid Moment Tensor Database
68TypeTypeBaxter, Alan TFault type
69Area/localityAreaBaxter, Alan TStress domain
Size:
42372 data points

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