Was there a volcanic eruption off Vietnam in AD 608?

Braddell, 1950, Notes on ancient times in Malaya: 6 Lankasuka and Kedah, J. Malayan Branch Royal Asiatic Soc., 23, 1 British Naval Intelligence Division, 1943, Indo-China, Geographical Handbook Series Chen, 1989 Chia, 1979, Weather and climate, 16 Crawfurd, 1928, Oxford in Asia Historical Reprints 1967 Dutt, 1985, Indochina: evolution of the core areas of Champa, the Mekong delta, Angkor and the Upper Mekong Valley, 179 Dutt, 1985, Indochina: Physical setting and evolution of the Tonkin core area, 165 Finlayson, 1826, The mission to Siam and Hue, 1821 Fontaine, 1978, Review of the geology and mineral resources of Kampuchea, Laos and Vietnam, 541 Gorshkov, 1976 Grimes, 1941, The journey of Fa-Hsien from Ceylon to Canton, Journal Malayan Branch Royal Asiatic Society, 19, 76 Hermann, 1935 Hsu, 1941, A study of Chih-tu or the Red Land, J. South Sea Soc., Vol. 2, 1 Hsu, 1967, Notes on the studies of ancient Malaya, 172 Khoo, 1983, Geologic evolution of Peninsular Malaysia, Vol. 1, 253 Mills, 1970 Moreland, 1934, Peter Floris—his voyage to the East Indies in the Globe, 1611 Patte, 1925, Étude de l'ile des Cendres, volcan apparu au large de la cote d'Annam, Bulletin du Service Géologique de l'Indochine, 13, 19 Simkin, 1981 Twitchett, 1979, Sui and Tang China 589–906, Vol. 3 Wheatley, 1961 White, 1924, A voyage to Cochin China Whitmore, 1986, “Elephants can actually swim”: Contemporary Chinese views of late Ly Dai Viet, 117