Table 1. A list of Reported eruptions of Asama, including dismissed reports.

Date Reference M Fatalities Remarks
1990.0720 JMA 0 0
1983.0408 Hayakawa (1993) 1.2 0
1982.0426 Aramaki and Hayakawa (1982) 1 0
1973.0201 Aramaki (1973) 1.3 0
1961.0818 newspaper and JMA (1991) 1 1 climber
1950.0923 newspaper 1 1 climber
1947.0814 newspaper and JMA (1991) 1 11 climber
1941.0709 JMA (1991) 1 1 climber
1938.0716 JMA (1991) 1.3 a few climber
1936.1017 newspaper 1 1 climber
1936.0729 JMA (1991) 1 1 climber
1931.0820 newspaper 3? climber
1930.0820 newspaper 1 6 climber
1913.0529 newspaper 1 1 climber
1911.0815 newspaper 1 >2 climber
1911.0508 newspaper 1 1 climber
1900.0715 Simkin and Siebert (1994) 1 Reported 25 fatalities is a misinterpretation of the tragedy at Adatara.
1783.0508 Tamura and Hayakawa (1995) 4.8 1400 Two killed by fallout on August 4, 1400 killed by a debris avalanche and induced lahar on August 5.
1721.0622 Asamayama Oyake Muni Monogatari 1 15 killed at the summit.
1598.0513 Todaiki Description that 800 people were killed at the summit is unreasonable.
1596.0501 Tenmei Shinjo Hen'iki 3 some not a contemporary document. Pele's hair-fall was observed in Kyoto.
1532.0104 Tenmei Shinjo Hen'iki 2 not a contemporary document. Villages along the Jabori River were, reportedly, swept away by hot lahars.
1281.07 Koshiden not a contemporary document. unreliable
1108.0829 Chuyuki 5.1 the largest eruption of Asama through the Holocene
887 Echigo Nendaiki an eruption of Niigata Yakeyama
685 Nihon Shoki probably an eruption from another volcano

JMA: Japan Meteorological Agency
M is eruption magnitude defined by M = log m -7, where m is mass of magma erupted in kg.