Essays about: "seismicity"

Showing result 16 - 20 of 21 essays containing the word seismicity.

  1. 16. Induced Seismicity in the Dannemora Mine, Sweden

    University essay from Uppsala universitet/Geofysik

    Author : Joanna Holmgren; [2015]
    Keywords : Mining-induced seismicity; phase picking; particle motion; local earthquake tomography; correlation; local magnitude;

    Abstract : Induced seismicity is a common phenomenon that occurs as soon as the stress state in the subsurface is externally altered in a way that faults are destabilized. It is especially problematic in stable tectonic regions where the area is not used to earthquakes; the infrastructure is not built to withstand ground movement and thus when the induced seismicity occurs damage can follow. READ MORE

  3. 17. Magmatic Sheet Intrusions as Seen in Surface Deformation - Developing a Tool for Interpreting Volcanic Unrest

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Frank Guldstrand; [2015]
    Keywords : Analogue modelling; surface deformation; cone sheets; dykes; moiré; photogrammetry; sheet intrusions; propagation; Analog modellering; ytdeformation; inverterade koner; vertikala plan; moiré; fotogrammetri; magmatiska intrusioner; propagering;

    Abstract : The end-member types of shallow magmatic intrusions comprise cone sheets and dykes. These propagate from their source magma chamber towards the Earth’s surface. The propagation of magma within the shallow part of the volcano plumbing system produces surface deformation and seismicity, signs of volcanic unrest. READ MORE

  4. 18. One- and Three-dimensional P- and S-wave Velocity Models of Central and Southern Sweden Based on SNSN Data

    University essay from Uppsala universitet/Geofysik

    Author : Ne Xun Chan; [2014]
    Keywords : Seismic tomography; seismicity; local earthquake tomography; Sweden; seismic network;

    Abstract : The velocity structures of southern and central part of Sweden have been derived with the local tomography (LET) method. The region has been divided into two study areas and the datasets come from the P- and S-wave traveltimes recorded by the Swedish National Seismic Network (SNSN). READ MORE

  5. 19. Sustainable Development in China’s Decision Making on Large Dams: A case study of the Nu River Basin

    University essay from Institutionen för geovetenskaper

    Author : Huiyi Chen; [2013]
    Keywords : Sustainable Development; large dams; Nu River; Resettlement; Biodiversity; Seismicity;

    Abstract : China’s consumption of electricity is increasing with its economic development. Although the main supply of electricity power is still coal, the government has recognized the importance of renewable energy and energy transition. READ MORE

  6. 20. Seismic tomography in the source region of the May 29th 2008 earthquake-aftershock-sequence in southwest Iceland

    University essay from Geofysik

    Author : Karin Berglund; [2012]
    Keywords : seismic tomography; Iceland; Mid-Atlantic ridge; seismisk tomografi; Island; mittatlantiska ryggen;

    Abstract : On May 29th 2008 two earthquakes with moment magnitude of Mw ~6 occurred in the southwestern part of Iceland. The second earthquake struck within only seconds after the first, on a fault ~5 km west from the first fault. The aftershock sequence was recorded by 14 seismic stations during the subsequent 34 days. READ MORE