A Richter scale measuring earthquake. — Twitter/@AFPA powerful earthquake with a preliminary magnitude of 7.2 has struck off the coast of Papua New Guinea, the US Geological Survey has said.The tremor was felt early on Saturday morning, around 6:04am local time, about 175 kilometres...source https://www.thenews.com.pk/latest/1298076-strong-earthquake-strikes-off-papua-new-guinea-s-coast
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