 It is unlikely that the earthquake alone was strong enough to rupture the sea bed to trigger a tsunami, but it appears to have been sufficiently powerful to have caused an undersea landslide that was capable of generating a tsunami, as happened in Papua New Guinea in 1998, killing around 2,500 people.The Bristol Channel floods are attributed to a storm surge, but suggested by some to have been a tsunami caused by an earthquake or a landslide from the Irish coast.A tsunami was reported by witnesses in England, Germany, the Netherlands and Denmark on 5 June 1858.