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record of historical seismicity. As crustal deformation rates in this 1,000 km
×
1,000 km
considered as a minimum seismicity migration rate for Australia at the neotectonic domain
scale.
There is some indication that the temporal clustering behaviour emerging from single-
fault studies in non-cratonic Australia may be symptomatic of a larger picture of the more-
or-less continuous tectonic activity from the late Miocene to Recent being punctuated by
Basin (D5) although it continued onshore until
late Pliocene and possibly the Pleistocene.
The Mount Lofty and Flinders Ranges (D2) are perhaps an exception to this rule. The
FRSZ has been associated with diffuse earthquake activity throughout the historic era
cases be confidently associated with neotectonic faults, strain rates and uplift rates estimated
from the seismic catalogue are approximately consistent with the number of neotectonic
crustal setting.
While the suite of neotectonic fault behaviours may vary across Australia, as implied by
the neotectonic domains model, one individual fault characteristic appears to be common
to most Australian intraplate faults studied - active periods comprising a finite number
of events are separated by typically much longer periods of quiescence (Crone
et al
.,
modelling from elsewhere in the world identify similar episodic behaviour on faults with
is highly variable but significantly longer than the inter-event times between successive
similar to that proposed by Friedrich
et al
.(
2003
)
(
Figure 2.7
)
.
The sparse data available in Australia suggests that an active period (e.g., t
1
,t
2
,t
3
in
Figure 2.7
)
in cratonic central or western Australia (D1) might comprise as few as two
intervals between large events in an active period in the order of 20-40 ka (Crone
et al
.,