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The Queensland catalog contains a total of 1369 earthquakes in the Brisbane
map region. Shown here are Richter magnitude ML > 0 events. The map shows
a high level of seismic activity spanning in a belt running through Brisbane
and to the north and north-west. The Brisbane map region is one of the better
monitored regions within Queensland due to almost continual operation of
the Brisbane international station since 1935 and installation of a dam
monitoring network around Wivenhoe dam since the late 70's. A reassessment
of the earthquake hazard in Queensland conducted by QUAKES in 1996 suggested
the South-East Queensland region running approximately from Brisbane to
Gladstone was one of the higher hazard parts of the state although uncertainty
remains significant due to data limitations.
The small stand-alone Wivenhoe seismic network was upgraded recently
by the dam agency (then South-east Queensland Water Board) for dam safety
purposes and remains functional.
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