{"id":36151,"date":"2023-11-25T21:35:32","date_gmt":"2023-11-25T20:35:32","guid":{"rendered":"https:\/\/www.ig.cas.cz\/?page_id=36151"},"modified":"2024-06-28T09:29:28","modified_gmt":"2024-06-28T07:29:28","slug":"naspmon-wp6-results","status":"publish","type":"page","link":"https:\/\/www.ig.cas.cz\/en\/naspmon-wp6-results\/","title":{"rendered":"NASPMON – WP6 results"},"content":{"rendered":"

[et_pb_section fb_built=”1″ fullwidth=”on” admin_label=”Section” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_fullwidth_header title=”NASPMON” subhead=”Seismic Tomography in Reykjanes Peninsula, SW of Iceland” admin_label=”Fullwidth Header” _builder_version=”4.16″ _module_preset=”default” title_text_color=”#000000″ title_font_size=”50px” background_image=”https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2018\/01\/iceland_header.jpg” global_colors_info=”{}”][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” custom_margin=”-15px||-15px||false|false” top_divider_style=”curve2″ top_divider_color=”#fbca1a” top_divider_height=”40px” bottom_divider_color=”#fbca1a” bottom_divider_height=”40px” global_colors_info=”{}”][et_pb_row column_structure=”3_4,1_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”3_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.24.2″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n

Seismic Tomography in Reykjanes Peninsula, SW of Iceland<\/h1>\n

Working package WP6 of the NASPMON project<\/h2>\n

Synopsis<\/h3>\n

Seismic tomography was calculated using similar approach as was used previously in West Bohemia region and documented in\u00a0R\u016f\u017eek and Hor\u00e1lek<\/a>\u00a0(2013) and in Reykjanes Peninsula documented in\u00a0R\u016f\u017eek<\/a>\u00a0(2021). The geological environment is modeled by a system of rectangular boxes in contact. Each box is characterized by individual P- and S-wave velocities, which are subject of calculations. Calculation of the velocity fields is based on fitting the observed and predicted P- and S-wave arrival times of local earthquakes. We used arrival times recorded by 18 stations and corresponding to 2089 local earthquakes. Spatial resolution (dimension of the boxes) was 1x1x1 km.<\/p>\n

Input data<\/h3>\n

List of stations<\/a>\u00a0in\u00a0NonLinLoc<\/a> format<\/p>\n

List of events<\/a> used for calculations<\/p>\n

Bulletin<\/a> of onset times<\/p>\n

Velocity model in a numerical form<\/h3>\n

Download model<\/a><\/p>\n

Graphical maps<\/h3>\n

Figures to download:\u00a0 P-waves velocity in png<\/a>, P-waves velocity in pdf<\/a>, S-waves veloctiy in png<\/a>, S-waves velocity in pdf<\/a><\/p>\n

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ESRI Shapefiles<\/h3>\n

P-waves velocity<\/a>, S-waves velocity<\/a><\/p>\n

Coordinate systems<\/h3>\n

Apart from geographical coordinates (longitude, latitude, altitude) a local Cartesian system is sometimes used (e.g. for graphical maps). Cartesian system is using x-axis oriented eastwards, y-axis northwards, z-axis upwards. Origin of the Cartesian system is\u00a0<\/span>-22W 64N<\/span>. For mutual transformations GMT software can be used. Example of a script is\u00a0here<\/a>.<\/span><\/p>\n

References<\/h3>\n

R\u016f\u017eek, B., Hor\u00e1lek, J., 2013. Three-dimensional seismic velocity model of the west Bohemia\/Vogtland seismoactive region. <\/span>Geophys. J. Int.<\/i><\/span>\u00a0<\/span>195<\/b><\/span>, 1251\u20131256.\u00a0http:\/\/dx.doi.org\/10.1093\/gji\/ggt295<\/a>.<\/span><\/p>\n

R\u016f\u017eek, B.:, 2021.<\/span>\u00a0Seismic anisotropy in the rift of the Reykjanes Peninsula, SW Iceland, calculated using a new tomographic method.\u00a0<\/span>Pure and Applied Geophysics<\/i><\/span>,\u00a0<\/span>178<\/b><\/span>\u00a0(8),<\/span>\u00a02871-2903, https:\/\/doi.org\/10.1007\/s00024-021-02784-1<\/a><\/span>.<\/span><\/p>\n

NonLinLoc<\/a> https:\/\/github.com\/alomax<\/a><\/p>\n

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Seismic Tomography in Reykjanes Peninsula, SW of Iceland Working package WP6 of the NASPMON project Synopsis Seismic tomography was calculated using similar approach as was used previously in West Bohemia region and documented in\u00a0R\u016f\u017eek and Hor\u00e1lek\u00a0(2013) and in Reykjanes Peninsula documented in\u00a0R\u016f\u017eek\u00a0(2021). The geological environment is modeled by a system of rectangular boxes in contact. 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