DOI: 10.5281/zenodo.6510002
title: Fault database for the George and NE Edward Rifts, Uganda

description: This database is associated with a master's research project at the University of Bristol. The initial geospatial database documents the geometry of 152 faults identified through digital mapping, along with associated attributes. This represents the first detailed fault mapping conducted in the area. The version of record is in .geojson format, however data is also available in .kmz and .shp formats. Attributes are adapted from Williams <em>et al. </em>(2022) and the Global Earthquake Model Global Active Faults Database (GEM-GAFD; Styron & Pagani, 2020). List and brief description of the attributes in the fault database ('EGR_faults') Attribute Data Type Description Notes FAULT_ID integer Unique numerical reference ID CONFIDENCE integer Certainty of whether the fault exists there 1 = moderate, 2 = high FAULT_NAME string Name of fault Not all faults are named. Assigned based on previous mapping or local geographic features. DIP_DIR string Compass quadrant of fault dip direction NOTES string Remaining miscellaneous information about the fault e.g. cross-cutting, segmentation, channel incision. LENGTH_TT integer Tip-to-tip fault length MAX_GRAD real number Estimated maximum gradient of scarp Calculated by taking fault-normal topographic profile at steepest gradient indicated by slope map. LENGTH real number Along-trace fault length Fault-normal topographic profiles were then used to measure scarp heights for 130 of the 152 mapped faults. The resulting displacement-length data for each fault is documented in 'slip_profile_data.zip'. A summary of the analysis of fault slip (displacement-length) profiles is outlined in 'EGR_slip_profiles_summary.xlsx'. List and brief description of the attributes in the slip profile summary ('EGR_slip_profiles_summary') Attribute Description Notes Fault ID Unique numerical reference ID Length Along-trace fault length To nearest 100m D<sub>max</sub> Maximum measured displacement along fault scarp D<sub>max</sub>/L Maximum displacement divided by fault length Profile type First order shape of slip profile Following classifications outlined by Manighetti <em>et al. </em>(2001): L = linear HR = half-restricted TR = tip-restricted DTR1 = both tips restricted, symmetrical DTR2 = both tips restricted, asymmetric DTR3 = half-restricted and tip-restricted QE = quasi-elliptical ET = elliptical with tapers U = unclear/intermediate pattern Dominant propagation direction Direction that fault is preferentially propagating in For unilaterally-propagating faults (tip- or half-restricted) as well as DTR and elliptical-with-taper faults that show a strong sense of preferred propagation Clarity rating How well profile is fit by first-order shape 1 - profile clearly fit by first order shape 2 - first order shape with moderate smaller-scale peturbations 3 - first order shape determined with some difficultly, may be obscured by segmentation, channel incision etc. 4 - profile not fit by any first order shape, or intermediate, or impossible to differentiate Segments Estimated number of segments that fault is formed from Interpreted from displacement minima and mapping observations. Notes Remaining miscellaneous information about the fault e.g. channel incision, anomalous topographic features
description: {"references": ["Manighetti, I., King, G.C.P., Gaudemer, Y., Scholz, C.H. and Doubre, C., 2001. Slip accumulation and lateral propagation of active normal faults in Afar. Journal of Geophysical Research: Solid Earth, 106(B7), pp.13667-13696.", "Williams, J.N., Wedmore, L.N., Scholz, C.A., Kolawole, F., Wright, L.J., Shillington, D.J., Fagereng, \u00c5., Biggs, J., Mdala, H., Dulanya, Z. and Mphepo, F., 2022. The Malawi Active Fault Database: an onshore\u2010offshore database for regional assessment of seismic hazard and tectonic evolution. Geochemistry, Geophysics, Geosystems, p.e2022GC010425.", "Styron, R. and Pagani, M., 2020. The GEM global active faults database. Earthquake Spectra, 36(1_suppl), pp.160-180."]}