Abstract
Abstract. As part of an interdisciplinary research project, funded by the European Research Council and addressing the mechanics of weak faults, we drilled three 200–250 m-deep boreholes and installed an array of seismometers. The array augments TABOO (The AltotiBerina near fault ObservatOry), a scientific infrastructure managed by the Italian National Institute of Geophysics and Volcanology. The observatory, which consists of a geophysical network equipped with multi-sensor stations, is located in the northern Apennines (Italy) and monitors a large and active low-angle normal fault. The drilling operations started at the end of 2011 and were completed by July 2012. We instrumented the boreholes with three-component short-period (2 Hz) passive instruments at different depths. The seismometers are now fully operational and collecting waveforms characterised by a very high signal to noise ratio that is ideal for studying microearthquakes. The resulting increase in the detection capability of the seismic network will allow for a broader range of transients to be identified.
Highlights
Scientists’ ability to integrate geological, seismological and laboratory observations related to earthquakes and faulting are essential for opening new paths of discovery and increasing our understanding of fault mechanics
The instrumented boreholes are part of The AltotiBerina near fault ObservatOry (TABOO; http://taboo.rm.ingv. it/; Chiaraluce et al, 2014), a scientific infrastructure managed by Institute of Geophysics and Volcanology (INGV) (Istituto Nazionale di Geofisica e Vulcanologia)
The infrastructure consists of sites equipped with multisensor stations, devoted to the monitoring of a 60 kmlong active normal fault system located along the northern Apennines of Italy (Fig. 1)
Summary
Scientists’ ability to integrate geological, seismological and laboratory observations related to earthquakes and faulting are essential for opening new paths of discovery and increasing our understanding of fault mechanics. To lower the minimum earthquake detection threshold and to enhance the resolution of the signals recorded by our seismic network, we decided to build a seismological antenna at depth.
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