GOSA (The Geyser Observation and Study Association)

Giant Geyser

Eurptions

1995 to Present

Compiled by David Schwarz

  
  1. September 18, 1963 ~22:00
  2. September 9, 1978 ~16:00
  3. September 27, 1982 12:47 ie
  4. October 12, 1984 01:11 ie
  5. August 20, 1986 11:36
  6. September 12, 1987 13:58
  7. June 28, 1988 21:55
  8. September 12, 1988 18:46
  9. December 18, 1988 00:36
  10. April 17, 1989 08:18 ie
  11. January 5-7, 1990 (not witnessed)
  12. January 25-27, 1990 (not witnessed)
  13. September 23, 1990 ~10:35
  14. September 30, 1990 15:25
  15. August 20, 1991 ~01:00
  16. October 20, 1991 17:22
  17. September 24, 1992 ~13:45 (time is visitor report)
  18. late November-early December, 1993 (between December 2 & 6?)
  19. September 29, 1994 12:52
  20. January 10-12, 1995 (probable eruption; not confirmed)
  21. September 25, 1995 15:19
  22. July 31, 1996 17:43
  23. October 9, 1996 18:27
  24. October 18, 1996 11:11
  25. October 24, 1996 13:07 i.e.
  26. November 9, 1996 01:11 (based on temperature recorder)
  27. November 18, 1996 10:55 (based on temperature recorder)
  28. January 1-3, 1997 (not witnessed)
  29. January 18-19, 1997 (between 1000 1/18 and 1300 1/19)
  30. February 6, 1997 17:00 (based on temperature recorder)
  31. February 24, 1997 11:07 (based on temperature recorder; visual 11:08 ns)
  32. March 4, 1997 13:57 (based on temperature recorder; visual 14:03 ie)
  33. March 13, 1997 22:57 (based on temperature recorder)
  34. March 23, 1997 07:45 (based on temperature recorder)
  35. March 30, 1997 19:29 MST (based on temperature recorder)
  36. April 6, 1997 19:32 MDT (based on temperature recorder)
  37. April 13, 1997 14:02
  38. April 23-24, 1997 (between 23:00 and 04:00)
  39. May 24, 1997 11:21 (Mastiff function)
  40. June 7, 1997 14:29 (normal function)
  41. July 10, 1997 6:06 (start type unknown)
  42. July 16, 1997 5:12 n.s. (start type unknown)
  43. July 22, 1997 7:45 (Mastiff function)
  44. August 1, 1997 6:34 (Mastiff function)
  45. August 10, 1997 8:42 (Mastiff function)
  46. August 24, 1997 12:24 (normal function)
  47. September 8, 1997 16:28 (Mastiff function)
  48. September 12, 1997 22:16 n.s. (start type unknown)
  49. September 16, 1997 ~06:30 (start type unknown)
  50. September 19, 1997 22:10 (start type unknown)
  51. September 23, 1997 20:40 (normal function)
  52. September 27, 1997 11:38 (Mastiff function)
  53. October 1, 1997 ~02:30 v.r. (visually confirmed as between 19:30 and 05:00, probably between 01:00 and 04:00--Grotto marathon ended at 19:30, water on boardwalk frozen when checked at 06:30)
  54. October 6, 1997 15:33 (normal function--with Turtle to > 2 feet!)
  55. October 9-10, 1997 (overnight before 0600; Grotto marathon began at 04:24 Oct. 10, so that is a likely time)
  56. October 14, 1997 07:21 (Mastiff function)
  57. October 17, 1997 16:44 MDT
  58. October 21, 1997 18:33
  59. October 25-26, 1997 (time unknown)
  60. October 30, 1997 04:15 MST (electronic datalogger (Jens Day) +/- 15 min)
  61. November 3, 1997 03:00 (electronic datalogger (Jens Day) +/- 15 min)
  62. November 7, 1997 17:15 (electronic datalogger (Jens Day) +/- 15 min)
  63. November 12, 1997 14:15 (electronic datalogger (Jens Day) +/- 15 min)
  64. November 16, 1997 02:00 (electronic datalogger (Jens Day) +/- 15 min)
  65. November 20, 1997 19:30 (electronic datalogger (Jens Day) +/- 15 min)
  66. November 24, 1997 13:30 (electronic datalogger (Jens Day) +/- 15 min)
  67. November 30, 1997 11:00 (electronic datalogger (Jens Day) +/- 15 min)
  68. December 3, 1997 23:45 (electronic datalogger (Jens Day) +/- 15 min)
  69. December 8, 1997 03:30 (electronic datalogger (Jens Day) +/- 15 min)
  70. December 12, 1997 06:30 (electronic datalogger (Jens Day) +/- 15 min)
  71. December 16, 1997 08:01 (electronic datalogger)
  72. December 20, 1997 06:02 (electronic datalogger)
  73. December 24, 1997 15:56 (Mastiff function--30-40 feet)
  74. December 29, 1997 17:43 (electronic datalogger)
  75. January 2, 1998 20:14 (electronic datalogger)
  76. January 6, 1998 11:54 (electronic datalogger)
  77. January 10, 1998 11:58 (electronic datalogger)
  78. January 14, 1998 09:08 (electronic datalogger)
  79. January 17, 1998 19:51 (electronic datalogger)
  80. January 21, 1998 12:17 (electronic datalogger)
  81. January 25, 1998 13:30 (electronic datalogger)
  82. January 29, 1998 06:38 (electronic datalogger)
  83. February 2, 1998 03:58 (electronic datalogger)
  84. February 6, 1998 00:23 (electronic datalogger)
  85. February 10, 1998 06:06 (electronic datalogger)
  86. February 14, 1998 13:34 (electronic datalogger)
  87. February 18, 1998 23:30 (electronic datalogger)
  88. February 22, 1998 08:02 (electronic datalogger)
  89. February 26, 1998 10:00 (electronic datalogger)
  90. March 2, 1998 14:48 (electronic datalogger)
  91. March 7, 1998 05:58 (electronic datalogger)
  92. March 12, 1998 13:37 (electronic datalogger)
  93. March 17, 1998 16:19 (electronic datalogger)
  94. March 23, 1998 16:15
  95. April 13-14, 1998 between 23:00 and 01:00
  96. April 30, 1998 ~04:00
  97. October 15, 1998 08:23 late ie
  98. May 9, 1999 07:27 (Mastiff function)
  99. June 20, 1999 00:40 late ie
  100. July 29, 1999 05:30 ie
  101. November 2, 1999 06:15 (electronic datalogger)
  102. November 8, 1999 01:34 (electronic datalogger)
  103. November 28, 1999 15:29 (electronic datalogger)
  104. December 9, 1999 12:58 (electronic datalogger)
  105. January 8, 2000, -- recorded inthe logbook as "1/8 early am" and "possibly overnight".
  106. January 27-28, 2000 overnight
  107. March 31- April 1, 2000 overnight
  108. April 7, 2000 13:59 (Mastiff function)
  109. April 14, 2000 09:32 (Mastiff function)
  110. April 22, 2000 09:50 (Mastiff Function, with Mastiff reaching 40+ feet. Giant was 250'+. The eruption came at the time of the start of the first Grotto after a marathon.)
  111. May 10, 2000 18:54ie (Water almost gone at 19:48, VR~18:40. Grotto in marathon.)

[ Giant Geyser ]

[ Return to Yellowstone's Geysers ] [ Return to GOSA Home Page ]

Comments and Questions are Welcome