Rubuta ci gaba ga wannan sakin layi - A ranar 1 ga Nuwamba 1755 girgizar Lisbon
ya haifar da seiching, wani nau'i na dakatarwa a cikin rufaffiyar rufaffiyar ruwa, tare da bakin tekun Cornish, kuma musamman a Mount's Bay, wanda ke da saurin yin seiching. Da misalin karfe 2:00 na rana, tekun ya tashi da kafa takwas a Penzance, ya shigo cikin sauri, kuma ya fadi a daidai wannan saurin. An yi rikodin ƙaramar lalacewa.