Faithful Geyser’s Lengthening Intervals
Abstract: As of December 31, 2001, Old Faithful’s average
interval has lengthened by 15 minutes, or almost 20%, since 1988. This report
reviews the record of Old Faithful’s average interval through the 1988 edition
of The Story of Old Faithful (which included data through 1987), updates the
record to contain additional summary statistics through 2001, and discusses
some of the changes in Old Faithful’s intervals that have occurred in recent
Geyser Hill Wave in May 2002
T. Scott Bryan
Abstract: A cursory examination of eruption data for Beehive
Geyser and Little Squirt Geyser indicates that the “Geyser Hill Wave” was
operating in May 2002 much as it did in Summer 1992.
Twentieth Century History of Giant Geyser, Upper Geyser Basin, Yellowstone
Abstract: Research in the archives of Yellowstone National Park
revealed numerous eruptions of Giant Geyser previously unknown to modern
observers. In this paper, this activity is discussed on a yearly basis. The
newly discovered eruptions change our perception of the pattern of Giant’s
activity during the 1900’s. George Marler believed Giant to erupt on a “five
year cycle” of activity. This does not appear to be the case. Also, there seem
to have been fundamental changes in Giant’s behavior three times this century
(pre–1900 to 1947, 1949 to 1955, and 1978 to present.
Geyser Activity in the Purple Pools Complex
Mike Keller, with T. Scott Bryan
Abstract: Eruptive activity by any of the Purple Pools is rare,
having been seen only in 1987, 1998 and 2000. South Purple Pool was active on
each of those occasions. In 1987 and 1998, it was accompanied by East and North
Purple Pools as they underwent their only known eruptions. In 1998 and 2000,
South Purple was also joined by UNNG–GNT–1. This historic action is summarized
in this paper.
and Mortar Geysers in the Summer of 2001, May 24 to November 4
Abstract: During 2001, Fan and Mortar Geysers erupted with
relative frequency. Observations of the cyclical activity between major
eruptions revealed consistent patterns of behavior. This article details the
patterns that were observed in 2001 and discusses how this activity differed
from that seen in previous years.
Geyser, Upper Geyser Basin, 1974—2001
Abstract: This paper summarizes Slide Geyser’s activity from
the inception of its known activity in 1974 through 2001. In general, during
this history the geyser has shown gradually increasing intervals and slightly
Activity North of East Mustard Spring in Biscuit Basin, June–July, 2001
Abstract: Five small hot springs located to the north of East
Mustard Spring in Biscuit Basin were active as periodic geysers during June and
July of 2001. This report describes the activity of the five springs and gives
data related to their eruption times, durations and intervals.
Activity North of East Mustard Spring in Biscuit Basin, May and August, 2002
Abstract: Observations on small geysers in the northern portion
of Biscuit Basin were conducted in 2002, prior to realizing that Steve Gryc had
made similar observations during mid–summer 2001. A comparison of the two data
sets indicates some significant changes in eruptive behavior.
Geyser: Electronic Monitor Results from 2000 and 2001
Abstract: An electronic temperature recorder, or data logger,
was deployed on Fountain Geyser beginning in August 2000. This paper discusses
the data collection methods and analyzes trends in Fountain Geyser’s eruptive
behavior as deduced from the temperature record from August 2000 to December
2001. A significant shift in eruption frequency and duration occurred following
a period of “wild phase” activity in November 2000.
Geyser Basin in 1974 — A Summary of Geyser and Disturbance Activity
T. Scott Bryan
Abstract: The summer season of 1974 was among the most
remarkable ever experienced at the Norris Geyser Basin. Most features with any
record of previous activity played that year, often with great frequency, and a
few features never previously known as geysers also underwent eruptive
activity. Many details about this action were recorded by the naturalist staff
in the handwritten logbook that was maintained at the Norris Museum. In fact,
so intense was the geyser activity that many things that would be taken as
extremely remarkable in later years were not recorded in 1974, because then it
was ordinary. It is highly unfortunate that the Norris logbook of 1974 was
misplaced for more than two decades before being located and made available
during 1998. Here, then, is information about a special year that, until now,
has gone largely unrecognized.
Geyser”, Potts Hot Spring Basin, 1997–2001
Ralph C. Taylor and James B. Grigg
Abstract: The authors have been studying the Potts Hot Spring
Basin under the auspices of the National Park Service, initially in Resource
Management and in the past three years with the Yellowstone Center for
Resources. During this study, one medium–sized geyser, informally named
“Resurgent Geyser,” has been active each year. The initial vandalized
condition, the repair of the damage, and the activity of Resurgent Geyser for
the years 1997–2001 are discussed in this paper.
Geysir Aroused by Earthquakes in June 2000
Abstract: Geysir, the namesake of all geysers, reactivated
following two earthquakes in June 2000. Geysir’s history and the rejuvenation
are described in this paper, as is the action by its neighbor, Strokkur.
Geysers of New Zealand — Part 1: The Rotorua Geothermal System
A.D. Cody, R.F. Keam and K.M. Luketina
Abstract: The Rotorua geothermal field contains the largest,
most spectacular and most consistently active geysers in New Zealand. The
historic and current activities of these geysers are described in this paper.
of New Zealand Geysers — Waikato Region outside of Rotorua
Katherine Luketina and Ashley D. Cody
Abstract: This paper provides a summary of geyser activity in
each New Zealand thermal area, other than the Rotorua Geothermal System.
Observational data is current to recent years and often into 2002.
of Waimangu, New Zealand
Dr. R.F. Keam
Abstract: Three thermal features in the Waimangu area, New
Zealand, exhibit geyser–like intermittent activity without ejecting elevated
water columns above their vents. This paper describes and defines these
features as “crypto–geysers” and asks if similar features are known elsewhere
(such as Yellowstone).
Comparisons of the World’s Major Geyser Fields
T. Scott Bryan
Abstract: The important geyser fields of the world are
remarkably small in areal extent. As illustration of this, these pages simply
present a series of comparative maps.