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UID:8131@gleanreport.com
DTSTART;TZID=Pacific/Auckland:20230817T120000
DTEND;TZID=Pacific/Auckland:20230817T130000
DTSTAMP:20230809T072324Z
URL:https://www.gleanreport.com/events/lorna-strachan-2/
SUMMARY:Does climate influence the frequency of volcanism and earthquakes? 
 A lecture by Lorna Strachan *IN PERSON or ONLINE*
DESCRIPTION:A controversial\, yet tantalizing recent theory suggests that g
 lobal rising sea levels can cause an increase in the frequency of volcanic
  eruptions and earthquakes. Such connectivity between the atmosphere\, hyd
 rosphere\, and geosphere at 1000-1\,000\,000-year time scales however is d
 ifficult to prove\, due to a lack of well-dated\, well-preserved\, long se
 diment records. Co-located volcanic eruptions in the TaupōVolcanic Zone a
 nd earthquakes associated with the Hikurangi Subduction Margin\, coupled w
 ith new long (>900 m) sediment marine records over multiple glacial-interg
 lacial cycles\, make Aotearoa-New Zealand’s\, North Island\, plate bound
 ary an ideal location to constrain these processes.\n\nDuring this talk\, 
 Lorna will highlight some the work that she and her team of 20 internation
 al and national researchers are doing to answer this question\, as part of
  a fully funded Royal Society\, Marsden project. The project uses Internat
 ional Ocean Discovery Program (IODP)\, Expedition 375 sediment cores extra
 cted from more than 3km water depth within the Hikurangi Trough to focus o
 n understanding the connections between glacio-climatic change\, volcanism
 \, and earthquakes over the last ~2 million years. The team have unravelle
 d details of past seafloor processes that are closely coupled to changes i
 n climate and ocean conditions. During the last glacial maximum for exampl
 e\, about 20\,000 year ago\, there was a sixfold increase in the delivery 
 of sediment to the deep ocean\, with unprecedented values of 1 m of sedime
 nt accumulation every 100 years. \n\nToday these systems are choked with s
 ediment\, as they are shed off an uplifting and occasionally explosive lan
 dmass. It is almost incomprehensible to imagine the magnitude and ferocity
  of natural physical and biogenic processes in the past.\n\nZoom link : ht
 tps://vuw.zoom.us/j/97963373089
CATEGORIES:Wellington
LOCATION: CO304\, Cotton Building\, VUW\, Victoria University of Wellington
 \, Wellington\, New Zealand
GEO:-41.2904017;174.7686615
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Victoria University of Well
 ington\, Wellington\, New Zealand;X-APPLE-RADIUS=100;X-TITLE=CO304\, Cotto
 n Building\, VUW:geo:-41.2904017,174.7686615
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