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Landslides typically occur after periods of heavy rain, when the ground has become waterlogged and unable to hold together. However, landslides can also be triggered by mining, leaking water pipes, earthquakes and volcanic eruptions. So, whatever time of year an area has heavy rainfall would be the time when landslides would be more likely to occur. In the United States, that would generally be in the spring - March through May.
Droughts can, and do, occur during any time of the year in Australia.
About twice a year.
once a year
several times a year
Once a year.
Once
about 1 year tops
About twice a year.
every 4 years
TWICE!!
It is very very rare that they will occur maybe 12 tornadoes a year