Valkaniotis Sotiris,PhD
New details about the complex surface ruptures and deformations arise as more data, observations and info are available for the New Zealand M7.8 earthquake.
As posted in the 1st Update, primary and secondary surface ruptures are reported and observed (from east to west) on London Hill Fault, Kekerengu Fault, Papatea Fault, Jordan Thrust, Uwerau Fault, Hundalee Fault and the Humps Fault Zone. Possible surface slip too on Fidget Fault, and part of Hope Fault (between Lyford & Stag And Spey). Also, newly unidentified or unmapped fault zones emerge, such as a western extension of The Humps Fault Zone below Emu Plain, the Woodchester Fault Zone (along this fault zone we observe an astonishing amount of ruptures and landslides) linking possibly Hope F. with The Humps FZ, and another SW-NE fault zone north of Hundalee.The presence of a possible offshore thrust zone near Kaikoura can be implied from InSAR first analysis announced.
Here we present some new info about previously unidentified or unmapped fault zones in Kaikoura area (major displacement along the SSW-NNE Kahutara Hills Fault Zone and also an WSW-ENE fault along the Kowhai river plain) and to the NE, previously unidentified or unmapped secondary fault zones (Hungry Hill fault). Distinctive slip and deformation is also evident along the London Hills fault in a 2-5km wide zone. The Haldon Hill fault (Marlborough District Council - Identification of active fault traces in Marlborough District - 2003) shows also evidence of slip.
ALOS2 InSAR from GSI Japan http://www.gsi.go.jp/cais/topic161117-index-e.html
High Rsolution PDF
Map 1
Map 2
Map 1. Kaikoura Area
Map 2. Malborough district area
Surface ruptures, Uwerau fault. Image @Tomnod, DigitalGlobe 2016
Wide surface rupture near Waiau. Dextral faulting with a reverse component, leading to displacements up to 8m locally. Part of The Humps Fault Zone rupture. Ortho-sketch from georeferncing of a NZDF aerial image (13-11-2016).