Book Chapter

The Cadell Fault, southeastern Australia: a record of temporally clustered morphogenic seismicity in a low-strain intraplate region

D Clark, A McPherson, M Cupper, CDN Collins, G Nelson

SEISMICITY, FAULT RUPTURE AND EARTHQUAKE HAZARDS IN SLOWLY DEFORMING REGIONS | Geological Society Special Publication | GEOLOGICAL SOC PUBLISHING HOUSE | Published : 2017

Abstract

The Cadell Fault, found in stable continental region (SCR) crust in southeastern Australia, provides a record of temporally clustered morphogenic earthquakes spanning much of the Cenozoic. The slip rate, averaged over perhaps as many as five complete seismic cycles in the period 70-20 ka, is c. 0.4-0.5 mm a-1, compared with an average rate of c. 0.005-0.01 mm a-1 over the period spanning the late Miocene to Recent. If full length rupture of the 80 km long feature is assumed, the average recurrence for Mw 7.3-7.5 earthquake events on the Cadell Fault in the period 70-20 ka is c. 8 kyr. About 20 kyr, representing more than two average seismic cycles, have lapsed since the most recent morphogen..

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