1991 - (1 year 120 days) May 2, 2000 - (8 years 213 days) April 26, 2002 - (1 year 359 days) September 13, 2002 - (140 days) March 26, 2003 - (194 days) April 27, 2003 - (32 days) October 22, 2003 - (178 days) May 23, 2005 - (1 year 213 days) February 21, 2007 - (1 year, 274 days) July 31, 2013 - (6 years, 162 days) September 3, 2014 - (1 year 34 days) Active phase since 2018 In 2018, Steamboat Geyser entered a much more active period with 161 major eruptions recorded between March 15, 2018 and January 28, 2023 32 eruptions occurred in 2018, 48 in 2019, 48 in 2020, 20 in 2021 and another 10 in 2022. This broke 1964's record of 29 eruptions within a calendar year. The 2018 record was broken on August 27, 2019 with the 33rd major eruption of the year. 2018 March 15, 2018 - (3 years 193 days) April 19, 2018 - (35 days) April 27, 2018 - (8 days) May 4, 2018 - (7 days) May 13, 2018 - (9 days) May 19, 2018 - (6 days) May 27, 2018 - (8 days) June 4, 2018 - (8 days) June 11, 2018 - (7 days) June 15, 2018 - (4 days) July 6, 2018 - (21 days) July 20, 2018 - (14 days) August 4, 2018 - (15 days) August 22, 2018 - (18 days) August 27, 2018 - (5 days) September 1, 2018 - (5 days) September 7, 2018 - (6 days) September 12, 2018 - (5 days) September 17, 2018 - (5 days) September 24, 2018 - (7 days) September 30, 2018 - (6 days) October 8, 2018 - (8 days) October 15, 2018 - (7 days) October 23, 2018 - (8 days) October 31, 2018 - (8 days) November 7, 2018 - (7 days) November 15, 2018 - (8 days) November 21, 2018 - (6 days) November 28, 2018 - (7 days) December 8, 2018 - (10 days) December 17, 2018 - (9 days) December 25, 2018 - (8 days) 2019 January 4, 2019 - (10 days) January 16, 2019 - (12 days) January 25, 2019 - (9 days) February 1, 2019 - (7 days) February 8, 2019 - (7 days) February 16, 2019 - (8 days) February 25, 2019 - (9 days) March 5, 2019 - (8 days) March 11, 2019 -