Blar i Bergen Open Research Archive på forfatter "Ottemöller, Lars"

Viser treff 1-16 av 16

    • 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 ...

    • Coordinated and Interoperable Seismological Data and Product Services in Europe: the EPOS Thematic Core Service for Seismology 

      Haslinger, Florian; Basili, Roberto; Bossu, Rémy; Cauzzi, Carlo; Cotton, Fabrice; Crowley, Helen; Custódio, Susana; Danciu, Laurentiu; Locati, Mario; Michelini, Alberto; Molinari, Irene; Ottemöller, Lars; Parolai, Stefano (Journal article; Peer reviewed, 2022)
      In this article we describe EPOS Seismology, the Thematic Core Service consortium for the seismology domain within the European Plate Observing System infrastructure. EPOS Seismology was developed alongside the build-up ...

    • Crustal structure and intraplate seismicity in Nordland, Northern Norway: insight from seismic tomography 

      Shiddiqi, Hasbi Ash; Ottemöller, Lars; Rondenay, Stephane; Halpaap, Felix Julian; Gradmann, Sofie; Michalek, Jan (Journal article; Peer reviewed, 2022)
      The Nordland region, Northern Norway, situated in an intraplate continental setting, has the highest seismicity rate in mainland Norway. However, the exact cause of seismicity in this region is still debated. Better ...

    • 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 ...

    • The Moho Architecture and Its Role for Isostasy—Insights From the Lofoten-Vesterålen Rifted Margin, Norway 

      Schiffer, Christian; Rondenay, Stephane; Ottemöller, Lars; Drottning, Anne Furubotten (Journal article; Peer reviewed, 2023)
      The crustal structure of the Nordland and Troms region, Norway, has received growing scientific attention because (a) the region is one of the most seismically active areas of mainland Norway, and (b) there are differing ...

    • Scanarray-a broadband seismological experiment in the baltic shield 

      Thybo, Hans; Bulut, Nevra; Grund, Michael; Mauerberger, Alexandra; Makushkina, Anna; Artemieva, Irina M.; Balling, Niels; Gudmundsson, Olafur; Maupin, Valerie; Ottemöller, Lars; Ritter, Joachim; Tilmann, Frederik (Journal article; Peer reviewed, 2021)
      The ScanArray international collaborative program acquired broadband seismological data at 192 locations in the Baltic Shield during the period between 2012 and 2017. The main objective of the program is to provide ...

    • Seismicity modulation due to hydrological loading in a stable continental region: A case study from the Jektvik swarm sequence in Northern Norway 

      Shiddiqi, Hasbi Ash; Ottemöller, Lars; Rondenay, Stephane; Custódio, Susana; Gahalaut, Vineet K; Yadav, Rajeev K; Halpaap, Felix Julian; Gahalaut, Kalpna (Journal article; Peer reviewed, 2023)
      Seismic swarms have been observed for more than 40 yr along the coast of Nordland, Northern Norway. However, the detailed spatio-temporal evolution and mechanisms of these swarms have not yet been resolved due to the ...

    • 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 ...

    • The Storfjorden, Svalbard, earthquake sequence 2008-2020: Transtensional tectonics in an arctic intraplate region 

      Ottemöller, Lars; Kim, Won-Young; Waldhauser, Felix; Tjåland, Norunn; Dallmann, Winfried (Journal article; Peer reviewed, 2021)
      An earthquake sequence in the Storfjorden offshore area southwest of Spitsbergen in the Svalbard archipelago initiated with a 21 February 2008 magnitude Mw 6.1 event. This area had previously not produced any significant ...

    • Toward Waveform-Based Characterization of Slab & Mantle Wedge (SAM) Earthquakes 

      Halpaap, Felix Julian; Rondenay, Stephane; Liu, Qinya; Millet, Florian; Ottemöller, Lars (Journal article; Peer reviewed, 2021)
      Earthquakes in subduction zones occur in the slab mantle, in the subducting crust, on the subduction plate interface, and, in some cases, in the mantle wedge–regions that are separated by strong seismic discontinuities. ...