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Audio, Radio New Zealand

More than 11,000 people reported feeling the earthquake that hit just after 2am on Friday. The magnitude 4.8 quake was centred 5-kilometres south of Te Aroha, at a depth of 6-kilometres. People from Kaitaia, through to the sodden regions of Auckland, Bay of Plenty, Coromandel, and even down in Christchurch, reported feeling it. A series of weaker aftershocks began to strike 40 minutes later, although there are no immediate reports of damage as of yet. It's not the first quake to hit Te Aroha this year - a 5.1 quake rattled the town on January 4. Te Kuiti resident Zane Burdett and Kees Meinderts from Motumaoho, just south of Morrinsville, spoke to Corin Dann.

Research Papers, Lincoln University

We examined the stratigraphy of alluvial fans formed at the steep range front of the Southern Alps at Te Taho, on the north bank of the Whataroa River in central West Coast, South Island, New Zealand. The range front coincides with the Alpine Fault, an Australian-Pacific plate boundary fault, which produces regular earthquakes. Our study of range front fans revealed aggradation at 100- to 300-year intervals. Radiocarbon ages and soil residence times (SRTs) estimated by a quantitative profile development index allowed us to elucidate the characteristics of four episodes of aggradation since 1000 CE. We postulate a repeating mode of fan behaviour (fan response cycle [FRC]) linked to earthquake cycles via earthquake-triggered landslides. FRCs are characterised by short response time (aggradation followed by incision) and a long phase when channels are entrenched and fan surfaces are stable (persistence time). Currently, the Te Taho and Whataroa River fans are in the latter phase. The four episodes of fan building we determined from an OxCal sequence model correlate to Alpine Fault earthquakes (or other subsidiary events) and support prior landscape evolution studies indicating ≥M7.5 earthquakes as the main driver of episodic sedimentation. Our findings are consistent with other historic non-earthquake events on the West Coast but indicate faster responses than other earthquake sites in New Zealand and elsewhere where rainfall and stream gradients (the basis for stream power) are lower. Judging from the thickness of fan deposits and the short response times, we conclude that pastoral farming (current land-use) on the fans and probably across much of the Whataroa River fan would be impossible for several decades after a major earthquake. The sustainability of regional tourism and agriculture is at risk, more so because of the vulnerability of the single through road in the region (State Highway 6).

Audio, Radio New Zealand

As Chief Executive of Te Runanga o Ngāi Tahu, Arihia Bennett leads a whanau of more than 78,000 iwi members, including their near-$2b worth of assets. She's been in the role for 11 years, overseeing all of Ngāi Tahu's operations, including farming, seafood, tourism and investment. She has also served as Canterbury Earthquake Recovery Commissioner, been on the board of Barnardos NZ and the Christchurch Women's Refuge (now known as Aviva). She is a current member of the Global Women's Network and the Tuahiwi Maori Women's Welfare League. In 2008, she was made a Member of the New Zealand Order of Merit for services to Maori and the community. Arihia Bennett is a social worker by profession, from a whanau steeped in community service. She talks to Susie Ferguson about her leadership style, her vision for Ngāi Tahu and her love of vintage clothes.