This week we analysed the internal structure of the sediment cores we collected at Rotoroa, Rotokaeo, and Waiwhakareke using a medical CT scanner at Hamilton Radiology. This method provides a first estimation about whether or not seismites (tephras deformed by earthquake activity) are present in the sedimentary record. Next week we plan to cut the cores lengthwise for detailed sediment description and sampling.
Members of the Tephra Seismites group and colleagues from UoW Earth Sciences attended the annual Waikato Regional Natural Hazards Forum at Hauraki District Council, Paeroa, on Friday 20 November. They joined colleagues from district and regional councils, Civil Defence and Emergency Management, and other research institutes to hear about and discuss aspects of natural hazard management and mitigation, with a focus on community engagement.
The Waikato team, including four (post)graduate students, gave a series of short ‘lightning talks’ on current research about newly-discovered faults in Hamilton and the liquefaction potential of lacustrine ash layers.
On Friday, 13th November 2020, paleoseismologists Dr Pilar Villamor and Dr Kate Clark of GNS Science visited the Tephra Seismites team at University of Waikato, to discuss their future collaboration. They will work together to map faults within the Hamilton lowlands, and eventually link the occurrence of fault ruptures to liquefaction observed in lacustrine tephra layers.