Estimation of seismic network detection thresholds for Austria
Authors: Apoloner Maria-Theresia , Hausmann Helmut , Horn Nikolaus ,   AlpArray Working Group
Published: March 2020

&lt;p&gt;&lt;span&gt;&lt;span&gt;Seismic networks are expanding and changing continuously: station instrumentation breaks and improves, new stations are set up permanently and tempora&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;ri&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;ly for projects, or get available online from seismological services. For routine processing, it is important to know&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;if and&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;whe&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;re&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;#160;adding an existing station to processing or building or improving a station will add the most value to the detection an location capabilities.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;&lt;span&gt;Therefore, in this study we calculate&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;seismic network detection&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;thresholds for Austria using&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;data available&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;#160;to us&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;from different sources: F&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;rom the&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;Seismic Network of Austria (OE)&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;, which consists of&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;unevenly distributed&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;high quality low noise broadband and strong-motion stations, with station spacing up to 100 km.&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;Cross-border&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;from neighboring countries, where each of them operates at least one seismic network with very different station quality and coverage.&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;As well as f&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;rom temporary&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;regional scientific projects (i.a. AlpArray (Z3), the SWATH (ZS)) and local infrastructure monitoring&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;(GeoTief EXPLORE 3D).&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;&lt;span&gt;Additionally to comparing different methods&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;(SN-CAST by M&amp;#246;llhoff et al. 2019, Net-Sim by Niko Horn, GT5-criterium)&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;with each other,&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;w&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;e also analyze how strong-motion stations, recently added due to&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;the&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;#160;interregio project ARMONIA,&amp;#160;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;improve&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span&gt;&amp;#160;the detection capabilities.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;