Ashley Fault Zone deformation areas 2014

Ashley Fault Zone deformation areas – areas of land that have been broken, buckled or warped when movements on the fault have broken through to the ground surface. These are areas where the land could be damaged in future earthquakes on the Ashley Fault Zone. The map doesn’t identify areas that would experience strong earthquake shaking from an earthquake on the Ashley Fault Zone – earthquake shaking would be experienced over a much larger area than shown here.

The “well-defined deformation” (red) is where there are well defined ‘scarps’ in the landscape – where land on one side of the fault has moved upwards and/or sideways compared to the other side during an earthquake on the fault. These fault scarps are up to several metres high.

The “distributed deformation” (pink) is where the land has been buckled or folded during movement on the fault, rather than cut in a sharp break.

The “uncertain deformation” (orange and light orange) is where the ground has been slightly tilted during past earthquakes on the fault.View the full report here.There are four maindata fields. 'AREA' gives the extent of each polygon in square metres. 'Feature' identifies the Fault Avoidance Zonation unit type, based largely on the 'TYPE' field in the Ground Deformation Map dataset.. 'FAZ_class' identifies the category of fault complexity, as set out in Table 2 of the report.'NAME' identifies the fault or other landform unit with which the FAZ unit polygon is associated.This dataset was compiled for presentation at a scale of 1:35,000 in the report, but the data were captured at more detailed scales.The dataset is derived from the ground deformation classes dataset. Accuracy of the polygon boundaries is the same as for the Geomorphologic map unit dataset. The geomorphologic map units were drawn on-screen at a scale of approximately 1:10,000, except for tectonic landform map units, which were mapped at ~1:5,000 scale. Locations of the boundaries of the map unit boundaries are considered to be accurate to about +/- 30 m, apart from the tectonic landform unit boundaries, which are considered to be accurate to +/- 10 m at best on the younger river terraces (Okuku Terrace 3/Makerikeri Terrace 2 and younger), but are no better than +/- 20 m on older terrace or hill landforms.

Data and Resources

Additional Info

Field Value
Theme {geospatial}
Author Canterbury Regional Council
Maintainer ECan GISTeam
Maintainer Email ECan GISTeam
Created 2016-09-18T20:02:30.000Z
Date modified 2017-03-27T00:24:10.744Z
Language English
Spatial {"type": "Polygon", "coordinates": [[[172.4654, -43.2842], [172.611, -43.2842], [172.611, -43.2364], [172.4654, -43.2364], [172.4654, -43.2842]]]}
Source Identifier
Record created April 10, 2017, Last Updated March 19, 2018