| Comments: | 1856 River on, 1859 River off, first River pause. 1900 tall Main Vent splash, 1903 Upper Mortar grumble and 2nd Main Vent splash, then frequent splashing. 1910-1915 near-constant splashes. 1916 MV splash into East. 1917 Upper Mortar water. 1918 LM fuzzballs. 1919 BV splashing. 1920 River on. MV splashing continued about once a minute. 1930 River off, second River pause. MV splashing continued through 1934. 1935 River on. 1936 Bottom Vent short eruption (d~1m). 1946 Gold on. 1951 Angle on. 1959 Back Vents on. Water levels variable until 1959, then improving until lock at 2004. UM surges started at 2004, Fan & Mortar 2006. |