Yellowstone Geysers Known Active in 1992

T. Scott Bryan

Cyclic Hot Spring Activity on Geyser Hill, Upper Geyser Basin, Yellowstone National Park—Graphical and Interpretive Descriptions of the Geyser Hill Wave, Diurnal Effects, Seasonal Disturbances, Random (Chaotic?) Events, and Earthquakes

T. Scott Bryan

Abstract: In an effort to better understand the complex relationships between geysers and other thermal features on Geyser Hill, a comprehensive study of eruptive and water level variations was conducted during July, 1992. The results show that there are both long-term and daily (diurnal) cycles superimposed on a general but slight randomness. The causes of these apparently independent cycles are speculated on.

Evidence for the Geyser Hill Wave and Diurnal Effects on Geyser Hill During the 1980s

T. Scott Bryan

Abstract: An examination of eruption interval data for Giantess and Beehive Geysers during 1981-1983 and for Plume Geyser during 1989-1990 indicates that the Geyser Hill Wave has been in operation during this entire span of time in a fashion similar to that observed during 1992. A similar look at miscellaneous Plume Geyser data shows that its diurnal effect was either absent or only weakly present until 1989.

Why Mortar is Fan: An Analysis of the History of the Fan and Mortar Geyser Complex

Paul Strasser

Abstract: Most geyser aficionados have considered the historic record of the section of the Upper Geyser Basin extending from Fan Geyser to Riverside Geyser as essentially complete and understood. Specific records of geyser activity in this area extend back to the Washbum-Langford- Doane expedition of 1870; members of this expedition named a feature "Fan Geyser" and reported one of its displays.

Fan and Mortar Geysers in the Summers of 1991 and 1992

David Schwarz

Abstract: Fan and Mortar Geysers erupted relatively frequently during the summers of 1991 and 1992. Eruption intervals from three to four days In 1991 and two to three days In 1992 were most common. Observed cycle lengths averaged 60 minutes (+/-15 SD) in 1991 and 55 minutes (+/- 13 SD) in 1992. Almost all eruptions were preceded by either a River Vent pause or a short cycle with no play from Angle. No relationship was found between Fan and Mortar and Riverside Geyser or Link Geyser.

Activity in East Sentinel Geyser, 1991 and 1992, with historical perspectives

Clark Murray

Abstract: East Sentinel Geyser is a rarely seen geyser in the Morning Glory Group, located in the Upper Geyser Basin of Yellowstone National Park, Wyoming. An observed eruption in September 1991 led to the realization that East Sentinel is capable of two distinctly different types of activity, from two different vents within the same crater.

Atomizer Geyser and Its Major Intervals: July-August 1985, with notes on changes since 1985

David Leeking

Abstract: During five non-consecutive periods during July and August. 1985. Atomizer Geyser was observed in an effort to make the first-ever accurate determination as to its true eruptive nature. A total of 13 intervals between major eruptions were logged. Data was also obtained about the minor activity, which culminates in the major eruption. Notes about the activity since 1985 are included.

Jewel Geyser: 5 August 1992 and 27 September 1992

Ralph C. Taylor

Abstract: This report describes the activity of Jewel Geyser during two short periods of observation in the summer of 1992. The number of bursts per eruption and eruption Intervals are contrasted with the values from the author's observations in 1989, 1990, and 1991. The 1992 activity had significantly more bursts per eruption and longer intervals.

A New Look at the Fountain Group

Rocco Paperiello

Abstract: This report attempts to do three things. To present as complete an overview as possible of what features exist in the Fountain Group, especially its geysers. To present a short history of activity, with more emphasis on information which is not found in readily available sources. And lastly, to reexamine some of the history of these springs with an attempt to untangle the amazing history of name jumbling which has taken place over the years.

Geyser Springs, Gibbon Geyser Basin, Yellowstone National Park—Historical and Current Observations

Genean, Tom, and Chris Dunn

Abstract: Geyser Springs is a small geothermal area in the Gibbon Geyser Basin of Yellowstone National Park. The area presents a varied mix of both alkaline and acidic thermal features, including fumaroles, geysers and mudpots. This report describes the features and their activity.

Visit to Josephs Coat Springs, Coffee Pot Hot Springs, and "Fairyland Basin"

Lee H. Whittlesey and Rocco A. Paperiello

Abstract: This report presents an account of our trip to a few infrequently or rarely visited thermal areas in the northern Mirror Plateau area of Yellowstone National Park. The areas visited are placed into an historical perspective, and some sketch maps are also included.

Visitors to Yellowstone Hot Springs Before 1870

Lee H. Whittlesey

Abstract: An analysis of diverse literature shows that Yellowstone was quite frequently visited during at least the 65 years prior to the so-called discovery by the Langford-Washburn-Doane Expedition of 1870. This chronology is confined to pre-1870 visits known to have seen and commented upon the thermal areas.

Mickey Hot Springs, Harney County, Oregon—Observations of March 27-29, 1992

Jeff Cross

Abstract: Mickey Hot Springs in southeastern Oregon is the site of a small geyser among about two dozen hot springs. This thermal area is described and mapped here. The cyclical activity shown by the geyser during three days in March 27-29, 1992 is included.

The Discovery of Kamchatka’s "Valley of Geysers"

Dr. Tatyana I. Ustinova

Introduction: The following narrative was prepared by Dr. Tatyana Ustinova in preparation for the talk she presented to a group of GOSA members in Yellowstone on July 25, 1992. The original hand- written text was rewritten and edited byT .Scott Bryan and then reviewed by Dr. Ustinova, who has given her permission for this publication.