• The 30 June 2017 North Sea Earthquake: Location, Characteristics, and Context 

      Jerkins, Annie; Shiddiqi, Hasbi Ash; Kværna, Tormod; Gibbons, Steven John; Schweitzer, Johannes; Ottemöller, Lars; Bungum, Hilmar (Journal article; Peer reviewed, 2020)
      The Mw 4.5 southern Viking graben earthquake on 30 June 2017 was one of the largest seismic events in the Norwegian part of the North Sea during the last century. It was well recorded on surrounding broadband seismic ...
    • Ambient noise levels and detection threshold in Norway 

      Demuth, Andrea; Ottemöller, Lars; Keers, Henk (Peer reviewed; Journal article, 2016-07)
      Ambient seismic noise is caused by a number of sources in specific frequency bands. The quantification of ambient noise makes it possible to evaluate station and network performance. We evaluate noise levels in Norway from ...
    • Earthquakes track subduction fluids from slab source to mantle wedge sink 

      Halpaap, Felix; Rondenay, Stéphane; Perrin, Alexander; Goes, Saskia; Ottemöller, Lars; Austrheim, Håkon; Shaw, Robert; Eeken, Thomas (Peer reviewed; Journal article, 2019)
      Subducting plates release fluids as they plunge into Earth’s mantle and occasionally rupture to produce intraslab earthquakes. It is debated whether fluids and earthquakes are directly related. By combining seismic ...
    • Extending local magnitude ML to short distances 

      Luckett, Richard; Ottemöller, Lars; Butcher, Antony; Baptie, Brian (Peer reviewed; Journal article, 2019)
      Local magnitudes calculated at stations less than 10 km from earthquakes in the British Isles are up to one unit of magnitude higher than local magnitudes calculated at more distant stations. This causes a considerable ...
    • Implications of 3D Seismic Raytracing on Focal Mechanism Determination 

      Newrkla, Katharina; Shiddiqi, Hasbi Ash; Jerkins, Annie; Keers, Henk; Ottemöller, Lars (Journal article; Peer reviewed, 2019)
      The purpose of this study is to investigate apparent first‐motion polarities mismatch at teleseismic distances in the determination of focal mechanism. We implement and compare four seismic raytracing algorithms to compute ...
    • Improved seismic monitoring with OBS deployment in the Arctic: A pilot study from offshore western Svalbard 

      Jeddi, Zeinab; Ottemöller, Lars; Sørensen, Mathilde Bøttger; Rezaei, Sara; Gibbons, Steven John; Strømme, Marte L.; Voss, Peter H.; Dahl-Jensen, Trine (Journal article; Peer reviewed, 2021)
      The mid‐ocean ridge system is the main source of earthquakes within the Arctic region. The earthquakes are recorded on the permanent land‐based stations in the region, although, smaller earthquakes remain undetected. In ...
    • Minimum 1D velocity model and local magnitude scale for Myanmar 

      Shiddiqi, Hasbi Ash; Tun, Pa Pa; Ottemöller, Lars (Journal article; Peer reviewed, 2019)
      Earthquake monitoring in Myanmar has improved in recent years because of an increased number of seismic stations. This provides a good quality dataset to derive a minimum 1D velocity model and local magnitude (⁠ML⁠) scale ...
    • Seismicity, Deformation, and Metamorphism in the Western Hellenic Subduction Zone: New Constraints From Tomography 

      Halpaap, Felix; Rondenay, Stéphane; Ottemöller, Lars (Peer reviewed; Journal article, 2018-02-23)
      The Western Hellenic Subduction Zone is characterized by a transition from oceanic to continental subduction. In the southern oceanic portion of the system, abundant seismicity reaches depths of 100 km to 190 km, while the ...
    • Source Study of the 24 August 2016 Mw 6.8 Chauk, Myanmar, Earthquake 

      Shiddiqi, Hasbi Ash; Pa Pa, Tun; Tun Lin, Kyaw; Ottemöller, Lars (Journal article; Peer reviewed, 2018)
      The source process of an intraslab intermediate‐depth earthquake (⁠h=90  km⁠) that occurred near Chauk, central Myanmar, on 24 August 2016 was investigated using teleseismic body‐wave inversion. The focal mechanism solution ...