Seminar by Andreas Grøvan Aspaas, Doctoral Research Fellow, Dept of Geosciences and Njord will give a talk with title.
What causes creep bursts in the Åknes landslide, Norway?
Abstract: Slow creeping landslides move at rates of millimeters to several meters per year. They can progressively weaken over time by rock mass damage processes that may occur by constant slow slip or sudden transient slips. These transient slip events, also called creep bursts, may induce short-term loading and hence can control landslide stability. Here, I present extensive multiphysics data series of the Åknes landslide, Norway. This landslide is moving at a slow rate of 6 cm per year, and could generate a large tsunami wave in a fjord if it would rupture catastrophically. I detected creep bursts in this landslide and built a catalogue of these events. Creep bursts interact with a distinct steady creep trend related to seasonal variations of precipitations. I analyze the creep bursts in regards to micro earthquake activity and water pressure levels, to study their origin and discuss possible mechanisms of formation.
The talk is in Aud 2 in the Geology Building. It is also possible to follow at Zoom.
Videolink to the lecture will be sent to the mailinglists alle@geo and geohyd-info@geo. If you want to subscribe to the geohyd-info@geo list send an email to Anita.
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About the seminar
This seminar is offered by the Section for Geography and Hydrology, Dept. of Geosciences, University of Oslo. The GEOHYD-seminars are announced as lunch seminars so bring your lunch if you want to.
The seminars are open for everyone interested, and especially students are welcome.
The Lunch Seminar Team
– Louise and Henning