The first 2.9 magnitude earthquake struck Port Hedland, in Western Australia's Pilbara region, at 8.44am on Wednesday. A second 2.8 magnitude tremor was recorded off the coast at 1,20pm.
A magnitude 3.6 earthquake has struck Port Hedland at a depth of 10km. Dozens in Western Australia woke up to the tremor, which hit the state's Pilbara region at 4.49am local time on Wednesday.