4/27/2023 0 Comments Free slime rancher modsIce is a crystalline solid-state material exhibiting both ductile and brittle deformation under tensile stress loading (Schulson and Duval, Reference Schulson and Duval2009). Interpretation of time-lapse interferograms is challenged by a varying ambient noise source distribution. We show that the ballistic part of the first surface waves can potentially be used to infer medium changes in both the ice body and the basal layer. Seismic interferometry suggests the existence of a thin basal sedimentary layer. Seismic event detection and localization reveals abundant surface crevassing and correlates with changes of the river discharge. Our 6 months long seismic dataset comprises the whole fill-and-drain cycle of the ice-dammed lake in 2012 and includes one of the most destructive floods recorded so far for the Zackenberg river. Episodic outbursts from the lake cause flood waves in the Zackenberg river, characterized by a rapid discharge increase within a few hours. To fill this gap, we installed a seismic network at the marginal, ice-dammed lake of the A.P. Seismic monitoring can contribute to an improved process understanding, but comprehensive long-term seismic monitoring campaigns capturing the dynamics of a rapidly-rising jökulhlaup have not been reported so far. The initiation and propagation processes of a rapidly-rising jökulhlaup are still not fully understood. Rapidly-rising jökulhlaups, or glacial outburst floods, are a phenomenon with a high potential for damage.
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