Similar phenomena were observed after the 1883 eruption of Krakatoa, and on the West Coast of the United States following the 1991 eruption of Mount Pinatubo in the Philippines.
(Sebuah fenomena serupa dicatat setelah letusan Krakatau pada 1883, dan di pantai barat Amerika Serikat setelah letusan Gunung Pinatubo pada 1991 di Filipina.)