The work that I started at 1am on the 14th of November four and half years ago has progressed a little. We submitted a paper on our 10-year long catalogue of earthquakes to JGR last week and the preprint is here: https://www.essoar.org/doi/abs/10.1002/essoar.10506901.1#.YIx8hwUxqeo.twitter

One of the fundamental goals of this work was to better define the fault structure at depth, and possible links between faults, while also constructing a temporally continuous catalogue to investigate pre and post-seismic variations in activity.

The combination of absolute, then relative relocations of lots of earthquakes (33k in the catalogue, 23k relocated) and 1,755 focal mechanisms shows some interesting patterns:

1) Offshore reverse faulting seems to provide a link between the Hundalee and Papatea Faults, providing a viable direct rupture pathway for the earthquake. This link *may* also help to explain the high slip on the Papatea fault despite its short length.

2) We identified an additional blind fault (that we have called the Snowgrass Fault) linking the Papatea and Clarence Faults - slip was triggered at the junction of the Clarence and Snowgrass within 10 minutes of the mainshock.

3) The Snowgrass Fault provides a structure to accommodate the change in displacement between the Jordan Thrust to the south-west, and the Kekerengu Fault to the north-east.

There is a lot more in the manuscript, including an improved hypocentre for the mainshock (which has an impact on anything computed relative to the mainshock), foreshock documentation, thoughts on rupture termination and more.

Somehow I managed to not mention #KaikouraEarthquake in this thread! This work is motivated by trying to understand this complicated earthquake.