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It is an eventual goal to use this sensor as a tool for ava-
lanche forecasting. This sensor could aid the forecaster in
determining the stability of the snowpack during rapid
loading. Also, it is a hope that these sensors will be able to
capture an avalancheevent. This should be evident when
the avalanchereleases and the data will record the sensor
moving back to a zero angle of tilt. Another primary goal
is to capturea deep old snow avalanchethat is induced by
the loading of new snow. This could hopefully lead to the
detection of the failure plane within these slabs.
The 1995-1996 data sets are inconclusive and no abso-
lute conclusions can be drawn from this first winter of re-
search.

ACKNOWLEDGMENT

The authors would like to extend its gratitude to Alta Ski
Lift Company and the Center for Snow Science at Alta.
Their generous support for providing the facilities and
equipment has made this project possible.

REFERENCES

Brown, C.B., R.J. Evans and D. McClung. The incorporation
of glide and creep measurements into snow slab mechanics,
Unpublished.

Clarke, J.A. and D.M. McClung, 1994. Correlation of fast rates
of snow glide with full-depth avalanche occurrence. Proceed-
ings of the International Snow Science Workshop in Snowbird,
Utah, October 30 - November 3, 1994, ISSW '94 P.O. Box 49,
Snowbird, Utah 84092 USA, p. 405-407.

Gubler, H., 1979. Acoustic emission as an indication of sta-
bility decrease in fracture zones, Journal of Glaciology, Vol.
22, No.86, p.186-188.

Peal, R.I., 1972. Generalization of Haefeli's creep-angle analy-
sis, Journal of Glaciology, Vol. 11, No. 63, p.447-450.

St. Lawrence, W.F., 1980. The acoustic emission response of
snow, Journal of Glaciology, Vol. 26, No. 94, p. 209-216.

Sommerfeld, R.A., 1977. Preliminary observations of acous-
tic emissions preceding avalanches, Journal of Glaciology,
Vol. 19, No. 81, p. 399-409.

Sommerfeld, R.A.,1975. Continuous measurements of defor-
mations on avalanche slopes, Proceedings of the Grindelwald
Sympo sium, April 1974.

Walker, Walter, 1994. Snow creep movement in the San Juan
Mountain snowpack Red Mountain Pass. Proceedings of the
International Snow Science Workshop in Snowbird, Utah, Oc-
tober 30 - November 3, 1994, ISSW '94 P.O. Box 49, Snowbird,
Utah 84092 USA, p. 408-413.

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