On the evening of July 30, 1997, 18 people were killed when a landslide engulfed two ski lodges at Thredbo in the Australian Alps. In the aftermath of this tragedy the Australian Geomechanics Society (AGS), formulated a protocol to quantify landslide risk, which has become known as the "AGS landslide risk management guidelines" (LRM), which were first published in 2000 and except for minor updates in 2002, 2007, and 2011 remain virtually unchanged and have been adopted by legislators and practitioners alike. At the same time as the AGS were working on their guidelines, several other researchers were working on a slightly different approach to quantifying landslide risk, and were using a "frequency/susceptibility" analysis to quantify the landslide hazard. This frequency/susceptibility methodology was adopted as the preferred protocol to quantify landslides in the Australian State of Queensland in 2003.
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