Browsing Institutt for geofag by Author "Weidle, Christian"

Now showing items 1-8 of 8

  • A 15 year record of frontal glacier ablation rates estimated from seismic data 
    Köhler, Andreas; Nuth, Christopher; Kohler, Jack; Berthier, Etienne; Weidle, Christian; Schweitzer, Johannes (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We present a unique time series of continuous glacier frontal ablation rates with weekly resolution over 15 years estimated from seismic calving observations at Kronebreen, Svalbard. Using linear statistical models, we ...
  • Autonomous detection of calving-related seismicity at Kronebreen, Svalbard 
    Köhler, Andreas; Chapuis, Anne; Nuth, Christopher; Kohler, Jack; Weidle, Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    We detect and cluster waveforms of seismic signals recorded close to the calving front of Kronebreen, Svalbard, to identify glacier-related seismic events and to investigate their relation to calving processes. Single-channel ...
  • Crustal and uppermost mantle structure of southern Norway: results from surface wave analysis of ambient seismic noise and earthquake data 
    Köhler, Andreas; Weidle, Christian; Maupin, Valerie (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    We use ambient seismic noise and earthquake recordings on a temporary regional network in southern Norway to produce Rayleigh and Love wave phase velocity maps from 3 to 67 s period. Local dispersion curves are then jointly ...
  • Directionality analysis and Rayleigh wave tomography of ambient seismic noise in southern Norway 
    Köhler, Andreas; Weidle, Christian; Maupin, Valerie (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
    We process seismic broad-band data from southern Norway by cross correlation of ambient seismic noise in view of getting a better image of the crustal structure in the area. The main data set sterns from the temporary ...
  • Dynamic vulnerability revealed in the collapse of an Arctic tidewater glacier 
    Nuth, Christopher; Gilbert, Adrien; Köhler, Andreas; McNabb, Robert Whitfield; Schellenberger, Thomas; Sevestre, Heidi; Weidle, Christian; Girod, Luc Maurice Ramuntcho; Luckman, Adrian; Kääb, Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Glacier flow instabilities can rapidly increase sea level through enhanced ice discharge. Surge-type glacier accelerations often occur with a decadal to centennial cyclicity suggesting internal mechanisms responsible. ...
  • On the effect of topography on surface wave propagation in the ambient noise frequency range 
    Köhler, Andreas; Weidle, Christian; Maupin, Valerie (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2012)
    Due to the increasing popularity of analyzing empirical Green’s functions obtained from ambient seismic noise, more and more regional tomographical studies based on short-period surface waves are published. Results could ...
  • Potentials and pitfalls of permafrost active layer monitoring using the HVSR method: A case study in Svalbard 
    Köhler, Andreas; Weidle, Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Time-lapse monitoring of the subsurface using ambient seismic noise is a popular method in environmental seismology. We assess the reliability of the horizontal-to-vertical spectral ratio (HVSR) method for monitoring ...
  • Regional passive seismic monitoring reveals dynamic glacier activity on Spitsbergen, Svalbard 
    Köhler, Andreas; Nuth, Christopher; Schweitzer, Johannes; Weidle, Christian; Gibbons, Steven John (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Dynamic glacier activity is increasingly observed through passive seismic monitoring. We analysed near-regional-scale seismicity on the Arctic archipelago of Svalbard to identify seismic icequake signals and to study their ...