Preliminary analysis of the accelerometric recordings of the August 24th, 2016 MW 6.0 Amatrice earthquake

Giovanni Lanzano Giovanni Lanzano,Rodolfo Puglia Rodolfo Puglia,Maria D'amico Maria D'Amico,Chiara Felicetta Chiara Felicetta,Lucia Luzi Lucia Luzi,Emiliano Russo Emiliano Russo,Francesca Pacor Francesca Pacor

doi:10.4401/ag-7201

Giovanni Lanzano Giovanni Lanzano, Rodolfo Puglia Rodolfo Puglia + Show 5 more

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https://doi.org/10.4401/ag-7201

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Abstract

<p>On 24 August 2016, at 1.36:32 GMT, a M<sub>W</sub> 6.0 earthquake with epicenter located below the village of Accumoli, struck a wide area among the boundaries of Lazio, Abruzzo, Umbria and Marche regions (Central Italy): the main event caused the collapse of several buildings and about 300 fatalities, mainly in the towns of Amatrice, Arquata del Tronto and Accumoli. The main event was recorded by about 350 sensors, belonging to Italian Accelerometric Network (Rete Accelerometrica Nazionale, RAN), operated by the Department of Civil Protection (DPC), to the Italian Seismic Network (Rete Sismica Nazionale, RSN), managed by the Istituto Nazionale di Geofisica e Vulcanologia (INGV) and to other local networks. All the corrected data are available at the Engineering Strong Motion Database (<a href="http://esm.mi.ingv.it">esm.mi.ingv.it</a>). This paper reports the preliminary results of the analysis of the strong-motion recordings.</p>

Highlights

On 24 August 2016, at 1.36:32 GMT, a MW 6.0 (INGV-CNT Seismic Bulletin) earthquake with epicenter located below the village of Accumoli, struck a wide area among the boundaries of Lazio, Abruzzo, Umbria and Marche regions (Central Italy)
The epicenter is located below the village of Accumoli (Latitude 42.70°, Longitude 13.23°, Depth 8.1km, Istituto Nazionale di Geofisica e Vulcanologia (INGV)-CNT Seismic Bulletin) and the fault plane solution (TDMT, CNT) indicates normal faulting, which is in agreement with the prevailing tectonic style of the area
GMPEs generally fit the observations in the near-fault for low periods spectral ordinates; at distances larger than 80km, the residuals show a positive bias in the sense that the GMPEs tend to under-predict the observed ground motions

Summary

INTRODUCTION

On 24 August 2016, at 1.36:32 GMT, a MW 6.0 (INGV-CNT Seismic Bulletin) earthquake with epicenter located below the village of Accumoli, struck a wide area among the boundaries of Lazio, Abruzzo, Umbria and Marche regions (Central Italy). The epicenter is located below the village of Accumoli (Latitude 42.70°, Longitude 13.23°, Depth 8.1km, INGV-CNT Seismic Bulletin) and the fault plane solution (TDMT, CNT) indicates normal faulting, which is in agreement with the prevailing tectonic style of the area (according to the seismogenic zonation ZS9, Meletti et al 2008). The processed records are available at the Engineering Strong-Motion database website (ESM, esm.mi.ingv.it, Luzi et al 2016) and the Italian Accelerometric Archive (ITACA, itaca.mi.ingv.it, Luzi et al 2008; Pacor et al 2011).

SPATIAL DISTRIBUTION OF THE GROUND

COMPARISON OF OBSERVED AND

WAVEFORM FEATURES OF NEAR-FAULT STATIONS

Findings

CONCLUSIONS