do great earthquakes occur on the alpine fault in central south island new zealand
Over the last thousand years, there have been four major ruptures along the Alpine Fault causing earthquakes of about magnitude 8. These had previously been determined to have occurred in approximately 1100, 1430, 1620 and 1717 CE, at intervals between 100 and 350 years. The 1717 quake appears to have involved a rupture along nearly 400 kilometres (250 mi) of the southern two thirds of the fault. Scientists say that a similar earthquake could happen at any time as the interval since 1717 is longer than between the earlier events. Newer research carried out by the University of Otago and the Australian Nuclear Science and Technology Organisation revised the dates of the pre-1717 earthquakes to between 1535 and 1596 (instead of 1620), 1374 and 1405 (instead of 1430), and 1064 and 1120 (instead of 1100). In addition, an earlier earthquake was identified to have occurred between 887 and 965.
Alpine Fault