Wikipedia:Map data/Whakatane Graben/key

<-Wikipedia:Map data/Whakatane Graben This data has been updated to be used on multiple relevant maps rather than the initial map of Whakatane Graben. Always assume that the manual processes involved could result in transcription inaccuracy and refer to original sources when appropriate. It is a map of active Taupō Volcanic Zone faults at the north east extreme of the Taupo Rift (red) but also includes some of the active faults of the North Island Shear Belt (purple) to allow context and nominally inactive faults (black). To minimise complexity only one inactive fault (black), defining the northern boundary of the old submarine edge of the old Taupō Volcanic Zone, is presently shown, the Tauranga Fault Zone. During map development it was noted that earthquake swarms (white shading) could show usefully active tectonic processes such as the swarm that occurred in the just off shore in the Tauranga Fault Zone a month before the 1987 Edgecumbe earthquake. Further the Matata swarm of 2005-2009 might suggest where there is uplift due to volcanic sill emplacement. Yellow shaded areas show aftershocks of the 1987 Edgecumbe earthquake which is land recently actively subsiding and expanding. The data on land faults is by default from NZ Onshore Active Faults Database which was last updated in November 2022 but some data came from the former 2014 database or the 2023 version at NZ 1:250K Geological GNS science. However where ever possible additional detail is from original academic work and these sources are referred to inline in the datafile. Some simplification was undertaken, especially with the off shore data, which paradoxically can be more detailed than some on shore data. The academic references include:

• Nairn, IA; Beanland, S (1989). "Geological setting of the 1987 Edgecumbe earthquake, New Zealand. New Zealand". Journal of geology and geophysics. 32 (1): 1–3. doi:10.1080/00288306.1989.10421383.
• Wright, I. C. (1990). "Late Quaternary faulting of the offshore Whakatane Graben, Taupo Volcanic Zone, New Zealand". New Zealand Journal of Geology and Geophysics. 33 (2): 245–256. doi:10.1080/00288306.1990.10425682.
• Beanland, S; Blick, GH; Darby, DJ (1990). "Normal faulting in a back arc basin: geological and geodetic characteristics of the 1987 Edgecumbe earthquake, New Zealand". Journal of Geophysical Research: Solid Earth. 10 (95(B4)): 4693–707. doi:10.1029/JB095iB04p04693.
• Taylor, Susanna K. A Long Timescale High-Resolution Fault Activity History of the Whakatane Graben, Bay of Plenty, New Zealand (PhD thesis Graduate School of the Southampton Oceanography Centre) (PDF) (Thesis). Retrieved 2023-04-04.
• Seebeck, H. A.; Nicol, P.; Villamor, J.Ristau; Pettinga, J. (2014). "Structure and kinematics of the Taupo Rift, New Zealand". Tectonics. 33: 1178–1199. doi:10.1002/2014TC003569.

Technical Note

The data file itself is no longer valid json but was developed as such and is served up as such. The file served up can vary from the default file based on the pagename of the calling page. The logic is mainly based upon case switching but also can colour some traces differently using if statements which are more difficult to get clean logic with. You can not debug this complete datafile now in sandbox (but can debug sections in a preview with a relevant pagename) or a Json checker which is best for pure Json debugging. The master map takes about 0.5 seconds to render first time. There is a cut off of 10 seconds built into wikipedia for such scripting. So although this data file is safe it is known that with more complex maps with ten times the data you can run into time issues. Once rendered Wikipedia serves up an image file of the map which is much faster but can lose detail and does not have mouse over functionality. Detail is always revealed by clicking on the map.

Key

Clicking on the map enlarges it, and enables panning and mouseover of fault name/wikilink and display of more individual fault data. Active Taupō Volcanic Zone faults at the north east extreme of the Taupo Rift are red, active faults of the North Island Shear Belt are purple for context and nominally inactive faults are black but these have not usually been added to minimise complexity. Relevant recent earthquake areas are shown in yellow shading associated with the 1987 Edgecumbe earthquake and with recent earthquake swarms in white shading.