Auckland Faults QGIS database, GIS file for Appendix 1

AbstractLocating faults can be challenging in urban environments and low-strain rate regions, where anthropogenic and surface processes between earthquakes erode surface expressions of faulting. Concealed fault detection is critical for hazard assessment and mitigation, as earthquakes on unidentified faults can have serious consequences. Common geophysical methods for identifying subsurface faults are challenging to implement in urban areas due to, for example, difficulties associated with permitting and anthropogenic noise. However, urban development can provide rich resources for identifying concealed faults, such as geotechnical boreholes and high-resolution LiDAR topography. The Tāmaki Makaurau Auckland area of Aotearoa/New Zealand is the country’s most populated region in a relatively tectonically stable setting, where intense urbanisation and Quaternary volcanics mask potential faults. We developed a new methodology and workflow to identify and assess the reliability of concealed structures in Auckland, using borehole, geophysical and outcrop data. From a database of >8,200 boreholes, we identify 46 post-Miocene structures, including ten likely and 25 possible faults. We also provide a new QGIS database of borehole and fault data to enable future refinement of our interpretations. This work shows how data associated with urbanisation can be leveraged to complement traditional methods of identifying concealed faults.在城市环境及低应变率区域中，定位断层是一项颇具挑战性的任务，因为地震期间的人为活动和地表过程会侵蚀断层的地表表现形式。对于灾害评估和缓解而言，隐蔽断层的探测至关重要，因为在不被识别的断层上发生的地震可能带来严重后果。由于例如许可困难和人为噪音等问题，常见的地球物理方法在城市地区的应用颇具挑战。然而，城市开发为识别隐蔽断层提供了丰富的资源，例如岩土工程钻孔和高分辨率激光雷达地形数据。位于新西兰奥克兰的Tāmaki Makaurau地区，作为该国在相对稳定的构造背景下的最人口密集区域，其强烈的城市化和第四纪火山活动掩盖了潜在的断层。我们开发了一种新的方法和工作流程，利用钻孔、地球物理和露头数据来识别和评估奥克兰隐蔽结构的可靠性。从超过8,200个钻孔数据库中，我们识别出46个中新世后的结构，包括10个可能的断层和25个可能的断层。此外，我们还提供了一套新的QGIS钻孔和断层数据数据库，以促进对未来解释的进一步细化。这项工作展示了与城市化相关的数据如何被利用以补充传统的隐蔽断层识别方法。