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The Uluru (Ayers Rock), Australia, earthquake of 28 May 1989

Australian Seismological Centre Australian Geological Survey Organisation, Canberra, Act 2601 Australia
Sutton Institute of Earthquake Physics South Australian Department of Mines and Energy, Eastwood, SA 5063 Australia
Seismology Research Centre Royal Melbourne Institute of Technology, Bundoora, Vic 3083 Australia

Abstract

At 02 hr 55 min 21 sec UTC on 28 May 1989 a Richter M_L 5.6 earthquake occurred in Central Australia in crystalline basement beneath the southern margin of the Amadeus Basin near Mt Olga and Uluru (Ayers Rock) in the Northern Territory. It had a well-constrained focal depth of 31 km, which explains why no surface faulting was discovered. It is the deepest earthquake known to have occurred in Australia prior to 1992, the largest to have been recorded in the region, and had no observed foreshocks or aftershocks. The earthquake was felt over a radius of 220 km and caused minor damage at Yulara. The fault plane solution indicates almost pure thrust faulting with a pressure axis striking N 64° E.

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