Ppt-3-14

Geysers Characteristics Before and After Landslide of June 3-rd, 2007 (Geysers Valley, Kamchatka, Russia)
V.A. Droznin, A.V. Kiryukhin J.D. Muraviev
Institute of Volcanology and Seismology FEB RAS, Piip-9, Petropavlovsk-Kamchatsky, Russia, 683006
[email protected]
ABSTRACT
GEYSERS CHARACTERISTICS MONITORING AFTER
LANDSLIDE JUNE 3-rd 2007
At 1:20 UTC June 3-rd, 2007 lower basin of the Geysers Valley was in a few
minutes buried under 10 mln m3 of mud, debris, and blocks of rocks. Some
indications were found, that landslide triggered by steam eruption in the upstream
area of Vodopadny creek. As a result of this three famous geysers (Pervenets,
Sakharny,Troynoy) located at lower elevations were sealed under 10-30 m
thick caprock as well as Vodopadny hot creek, a rock dumb trap Geysernaya river
and lifted water into 30 m deep lake, which flooded three famous geysers (Conus,
Bolshoy and Maly) terminating their cycling activity. Nevertheless Bolshoy and Maly
geysers activity continues in a form of discharge of water circulated in the former
geysers channels and a clear plume at a lake surface above exits observed. Later,
Bolshoy restarted geysers activity. Continuous monitoring of the cycling
characteristics of the upper basin geysers, including Velikan, Bolshoy and lake level,
accomplished by temperature and pressure loggers restarted shortly after landslide
event. It was found that some geysers activity significantly influenced by lake level
elevation.
INTRODUCTION. GEYSERS CHARACTERISTICS BEFORE
LANDSLIDE JUNE 3-rd 2007
Geysers Valley was find by T. Ustinova (1941). At this time most of the geysers
received their names. Before year 1972 there was no regular geysers study (S.
Naboko, 1954); most observations took place within a few hours. Systematic and
regular monitoring started by V. Sugrobov (1982,1985). At this time geysers cycling
recorded by water level devices, installed at the geysers outflows during summer
time for 1-3 month per year. In 1974-1975 V. Nechaev conducted 13 month
monitoring observations. Since 1990 geysers activity recorded by automatic
telemetric system (V.A. Droznin).
Вариации значения периода гейзера Великан по данным регистрации
за 2002 год (V.A. Droznin)
GEYSERS BOLSHOY AND VELICAN ACTIVITY VS LAKE LEVEL
VARIATIONS
c
a
d
CONCLUSIONS
Our goal is to get at least one year cycle of the monitoring data in the Geysers
Valley after landslide June 3-rd 2007, including newly created lake, geysers
Bolshoy and Velikan, other key geysers, as well as change of the heat and mass
characteristics of the hydrothermal system as a whole.
We need these data to set up and calibrate model for predicting meteoric water
infiltration in hydrothermal system and change of the hydrogeological conditions of
existing geysers.
This model will help to develop strategy to keep sustainable geysers activity and
attractive features of the Geysers Valley for recreation and numerous tourists
visitors.
ACKNOWLEDGEMENTS
b
e
Landslide in Geysers Valley June 3-rd 2007 terminated 9 geysers, 13 geysers were
flooded by lake and 19 remaining geysers continue activity. Monitoring of the
created lake parameters (lake with length 1.8 km and area 0.8 km2), geysers
Bolshoy and Velikan (see Fig. above) and others key geysers needed to set up and
calibrate model for predicting meteoric water infiltration in hydrothermal system and
change of hydrogeological conditions existing geysers.
Pressure and temperature loggers (Onset Computers Inc.) were used to register
water level in the lake and outflow temperatures from the geysers Bolshoy and
Velikan.
Installation of the temperature logger in geyser Bolshoy pool
f
g
We express our gratitude to Kronotsky Biological State Reservation for valuable
transportation help and local support. This work was supported by FEB RAS project
06-I-ОНЗ-109 and RFBR project 06-05-64688-а.
REFERENCES:
Graphs above and below shows transient outflow temperatures of the geysers
Bolshoy and Velikan, lake level and temperature, and air temperature.
Its clearly shown that relatively small lake level elevation (up to 3-5 cm) during
rain periods caused terminating of Bolshoy geyser activity and significant
increase of the time period of Velikan geyser eruptions (from usual 6 hr to 13 hr)
with increasing number of intermediate boiling events from usual 5-6 to 27.
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