Two earthquakes have struck near the town of Port Hedland in the past 12 hours, with Geoscience Australia saying the first was likely a 'foreshock' ahead of the second 3.8-magnitude tremor.
What's next?A magnitude 3.8 earthquake has shaken the Pilbara mining town of Port Hedland , the second in one day.
It comes just hours after a 3.1-magnitude earthquake woke residents in the region in the early hours of Thursday morning, with the epicentre 70 kilometres south of the town. In the past decade 11 earthquakes over magnitude 3.0 have been recorded within 100 kilometres of Port Hedland.Geoscience Australia senior seismologist Dr Hadi Ghasemi said it was not unusual to have small earthquakes in the region, but it was not typical to have an aftershock larger than the initial earthquake."But if there's an aftershock, generally speaking, the aftershock would be much smaller than the main shock itself.
"We know that there are a small fraction of earthquakes which are followed by a larger nearby earthquake," he said.Last month Port Hedland residents were shaken awake by another earthquake 30 kilometres to the south-east registering magnitude 3.5.The region is well known for its mining industry, with major iron ore and lithium producers operating in the region.
Geoscience Australia Port Hedland Strelley
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