What Causes A La Nina Earthquake

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In 2011, there was a high amount of rainfall falling across South East Queensland. This was caused by Cyclone Tasha and a La Nina. A La Nina is an unusual weather pattern that occurs every 3 – 5 years. It happens when one part of the Pacific Ocean cools, and another part warms up. Warmer sea temperatures can cause tropical cyclones. Therefore, there was a massive increase in rain water which made Wivenhoe Dam release water towards the Brisbane flood plain.