Blar i forfatter "Köhler, Andreas"

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    • Development of the NORSAR Network over the Last 50 Yr 

      Schweitzer, Johannes; Köhler, Andreas; Christensen, Jon Magnus (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-27)
      This contribution describes the development of Norwegian Seismic Array (NORSAR), from its origin 50 yr ago as a project for installing a single seismic array in southern Norway to a seismological research institute operating a network of six arrays and 14 three‐component stations located in Norway and Antarctica. In addition, we document the different instrumentations from narrowband, mostly ...

    • Long-term analysis of cryoseismic events and associated ground thermal stress in Adventdalen, Svalbard 

      Romeyn, Rowan Peter; Hanssen, Alfred; Köhler, Andreas (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-25)
      The small-aperture Spitsbergen seismic array (SPITS) has been in continuous operation at Janssonhaugen for decades. The high-Arctic location in the Svalbard archipelago makes SPITS an ideal laboratory for the study of cryoseisms, a nontectonic class of seismic events caused by freeze processes in ice, ice–soil, and ice–rock materials. We extracted a catalog of > 100 000 events from the nearly ...

    • Vs30 and depth to bedrock estimates from integrating HVSR measurements and geology-slope approach in the Oslo area, Norway 

      Ghione, Federica; Köhler, Andreas; Dichiarante, Anna Maria; Aarnes, Ingrid; Oye, Volker (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-09)
      This work shows an alternative and efficient method to estimate Vs30 values and depth to basement data. The Vs30 value is the most important attribute to characterize the soil type and subsequently account for soil type related seismic amplification. We believe that these tools offer a powerful, non-invasive and cost-effective solution for obtaining accurate estimations of depth to basement. This ...