Scientists have debunked a post, which warned a 'major earthquake' would hit the South Pacific on November 14 because of the supermoon, after it gained prominence this morning. The post was circulating on various social media outlets today in the wake of the 7.5 magnitude earthquake which struck the South Island early this morning, killing two. The warning, posted by Nigel Antony Gray on November 6, urged people to stock up on supplies and be prepared in case an earthquake struck the region in coming days. READ MORE: • Live: 7.5 magnitude earthquake strikes near Hanmer Springs in South Island, tsunami warning for many New Zealand coastal areas • Deadly earthquake: What you need to know However, earthquake experts have rubbished his theories, saying there is no evidence linking supermoons with earthquakes, and no science to predict when an earthquake will occur. "Heads Up: On 14th November and a couple of days either side of that date, watch for a major earthquake, and quite possible in South Pacific area," Gray's warning begins. "The reason for this is that 14th of Nov will be a 'supermoon' largest for this century." That meant there would be increased gravitational pull from the moon, he said, and combined with the recent large earthquakes in Italy, could cause stress on tectonic plates in other areas. "[T]he chances of a big quake are higher for something down this end of the globe," he said. He tempered his warning, saying it was "just a possibility", but urged people to be alert and always prepared with essential water and food supplies. Gray was last night posting about the magnitude 7.5 earthquake in Hanmer Springs. Screenshots of his prediction have been posted numerous times on Twitter, and his name was this morning appearing as a trending search topic on Facebook. Two people have died and there are reports of other casualties following the quake, which struck at 12.02am. However, GNS Science seismologist Dr John Ristau said there was no evidence linking supermoons to earthquakes. "There's no direct link between them," he said. An earthquake such as the one which struck the South Island this morning would occur in the south Pacific around once a year, Ristau said. "In this part of the world, If you think of New Zealand, going all the way up to Samoa and Fiji and off to the Solomon Islands and Vanuatu and all these places, and even including the Philippines in the south Pacific, a 7.8 [magnitude earthquake] you could probably find one at least every year that happens somewhere in the region. "So it's really just a coincidence that it happened at the same time as the moon." A recent paper by some Japanese researchers found a weak correlation between high tides at full moon and earthquakes, he said.