Calum J. Chamberlain.

Seismologist, cyclist, tinkerer.

About Me

I am a Postdoctoral Reserach Fellow in seismology and fault mechanics at Victoria University of Wellington. My research focuses on the detection and analysis of microseismicity, aftershocks, repeating earthquakes and slow earthquakes. Particularly I like to think about how earthquakes start and stop.

To facilitate our groups research I have led the development of the EQcorrscan Python package. EQcorrscan hosts codes for the detection and analysis of repeating and near-repeating seismicity. The package is open-source (LGPL licenced) and is developing a small community.

If you can't get hold of me, I'm probably out riding bikes in the hills around Wellington.

Research

My research focuses on seismology and fault mechanics. I use detailed catalogues of earthquakes as a tool to study fault processes.

Low-Frequency Earthquakes

First documentation of 14 low-frequency earthquake (LFE) families near the inferred deep extent of the Alpine Fault (Chamberlain et al., 2014)

Victoria University of Wellington PhD student Laura-May Baratin has updated the initial catalogue with improved locations, longer duration and added focal mechanisms (Baratin et al., Under revision for EPSL).

We are now working on extending the catalogue using more templates in an effort to generate a spatially and temporally continuous catalogue.

Deep Fault Drilling Project

The Deep Fault Drilling Project is a multi-national effort to drill into and sample the Alpine Fault at depth to study fault processes on a major fault thought to be late in it's seismic cycle.

I was involved in the real-time seismic monitoring for DFDP-2 which found elevated temperatures at moderate depths (Sutherland et al., 2017).

Tasman Glacier Speed-up Events

The Tasman Glacier is a large temperate glacier (containing 29% of New Zealand's perenial ice) near Mt. Cook in the central Southern Alps.

During high-rainful Tasman Glacier accelerates, as observed by Horgan et al. (2015) and radiates tremor-like seismic energy.

SAMBA

SAMBA is a network of short-period sensors deployed mostly in shallow (post-hole) boreholes, with three deeper borehole sites, and four short-period surface sensors to extend the network over the LFE and tremor source region.

Data from SAMBA are available from IRIS

EQcorrscan

A Python package for detection and analysis of repeating and near-repeating seismicity.

EQcorrscan has been under development since 2015, and is now (as of late 2017) in a reasonably useful and stable state. I have so-far led the development of this software, and it forms the backbone for a lot of my research.

EQcorrscan is developed on github, and installable via pip or anaconda.

Publications

  • Foreshocks and delayed triggering of the 2016 MW7.1 Te Araroa earthquake and dynamic reinvigoration of its aftershock sequence by the MW7.8 Kaikōura earthquake, New Zealand, E. Warren-Smith et al. - Earth and Planetary Science Letters, 2018

  • Real‐Time Earthquake Monitoring during the Second Phase of the Deep Fault Drilling Project, Alpine Fault, New Zealand, C. J. Chamberlain et al. - Seismological Research Letters, 2017

  • Bedrock geology of DFDP-2B, central Alpine Fault, New Zealand, V. G. Toy et al. - NZJGG, 2017

  • High‐Precision Analysis of an Aftershock Sequence Using Matched‐Filter Detection: The 4 May 2015 ML 6 Wanaka Earthquake, Southern Alps, New Zealand Warren-Smith et al. - Seismological Research Letters, 2017

  • Extreme hydrothermal conditions at an active plate-bounding fault Sutherland et al. - Nature, 2017

  • 3-DP-and S-wave velocity structure along the central Alpine Fault, South Island, New Zealand Guo et al. - Geophysical Journal International, 2017

  • Cross-correlation-based detection and characterisation of microseismicity adjacent to the locked, late-interseismic Alpine Fault, South Westland, New Zealand Chamberlain et al. - Earth and Planetary Science Letter, 2017

  • Glacier velocity variability due to rain-induced sliding and cavity formation Horgan et al, - Earth and Planetary Science Letters, 2015

  • Changes in hot spring temperature and hydrogeology of the Alpine Fault hanging wall, New Zealand, induced by distal South Island earthquakesCox et al. - Geofluids, 2015

  • Lithosphere–asthenosphere interactions near the San Andreas fault Chamberlain et al., - Earth and Planetary Science Letters, 2014

  • Low‐frequency earthquakes reveal punctuated slow slip on the deep extent of the Alpine fault, New Zealand Chamberlain et al., - Geochemistry, Geophysics, Geosystems, 2014