Previously scientists had determined the ages for only the last four earthquakes … The Alpine Fault last got seriously testy in 1717 or thereabouts and before that, in descending order, 1620, 1430 and 1100. At 3 AM on May 29, 2013, the South Island’s technological uncon­scious roars […] The fault line is where the Eurasian … It’s the part of the active boundary between the Pacific and Australian tectonic plates where they intersect on land. The Alpine Fault runs for over 800km up the spine of the South Island. The Alpine Fault is sometimes compared with California's San Andreas Fault, being another fast-moving strike slip fault near a plate boundary. In fact, this is one of the longest earthquake records in the world! The Alpine Fault runs right through the heart of New Zealand's glacier county on the country's south island. The Alpine Fault ruptures—on average—every 330 years with a magnitude 8 earthquake. Geologists and authorities are racing to quantify what might happen, and how they might respond in the event of the next one, likely to occur some time in the next 50 years. The Southern Alps have been formed over millennia by upthrust from successive earthquakes on the Alpine Fault. Revising the Displacement History of New Zealand's Alpine Fault . Scientists currently regard the fault as having several sections, each of which exhibits a different rupture history and all of which can generate a large earthquake. The findings published in the Bulletin of the Seismological Society of America suggest that some places along the fault, particularly around the towns of Hokitika and Greymouth, could experience strong ground shaking from Alpine fault earthquakes more often than previously thought.. The Alpine Fault is sometimes compared with California’s San Andreas Fault, being another fast-moving strike slip fault near a plate boundary. 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