A5069035004- Seismic Waves and Analysis
- Seismic Performance and Analysis
- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Structural Health Monitoring Techniques
- Geological and Geophysical Studies
- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Masonry and Concrete Structural Analysis
- Landslides and related hazards
- Geophysics and Sensor Technology
- Geological Modeling and Analysis
- Geological and Geophysical Studies Worldwide
- Seismic and Structural Analysis of Tall Buildings
- 3D Surveying and Cultural Heritage
- Geophysical Methods and Applications
- Urban Planning and Valuation
- Disaster Management and Resilience
- Geotechnical Engineering and Underground Structures
- Engineering Applied Research
- BIM and Construction Integration
- Acoustic Wave Phenomena Research
- High-pressure geophysics and materials
Istituto Nazionale di Geofisica e Vulcanologia
2015-2024
During three moderate‐magnitude earthquakes occurred in September–October 1997 the central Apennines, Italy, accelerations larger than 0.5 g were recorded town of Nocera Umbra, 10 to 15 km N‐NW epicenters. The accelerograph is sited a fault zone, close N30°E tectonic contact. Six temporary seismological stations installed across 82 aftershocks two seismogenic zones: Colfiorito‐Sellano area, S‐SE array, and Gualdo Tadino north. array data reveal large variations terms both peak ground motions...
Site-effect assessments performed through earthquake-based approaches, such as the standard spectral ratio (SSR), require good quality records of numerous earthquakes. In contrast, use ambient noise appears to be an attractive solution for ease and rapid computation site responses with sufficient spatial resolution (microzonation), especially in low seismicity areas. Two main approaches are tested here: horizontal-to-vertical (HVSR) noise-based SSR (SSRn). The HVSR uses relative amplitude...
During the MW 5.7 and 6.0 Umbria–Marche earthquakes of 1997 September 26, historical centre Nocera Umbra suffered MCS intensity VII–VIII. The zone is located on top a hill, condition potentially favourable to ground motion amplification. However, also vulnerability higher hill because ancient age buildings. A temporary array eight seismological stations was installed across quantify amplification effect due topography. Waveforms 14 aftershocks (2.6 < ML 4.1) are selected for analysis. each...
Abstract This paper presents a comprehensive geological and geotechnical study of the whole area affected by liquefaction following 2012 Emilia earthquakes, including all available information from field reconnaissance surveys, in situ tests, laboratory analyses. The compilation was performed at 120 liquefied sites to verify validate reliability charts alluvial sediments, assess induced seismic sequence plain. results reveal wide range grain sizes (from clean sands sandy silts) compositional...
Abstract In recent years, the permanent seismic networks worldwide have largely increased, raising amount of earthquake signals and applications using records. Although characterization soil properties at recording stations has a large impact on hazard estimates, it not been implemented so far in standardized way for reaching high-level metadata. To address this issue, we built an online questionnaire identification indicators useful reliable site station. We analysed answers number experts...
Abstract This paper describes the seismological analyses performed within framework of seismic microzonation study for reconstruction 138 municipalities damaged by 2016–2017 sequence in Central Italy. Many waveforms were recorded over approximately 15 years at 180 instrumented sites equipped with permanent or temporary stations an area that includes all localities. Site response was assessed using earthquake and noise recordings selected through different parameters, such as spectral...
The characterization of the soil properties at seismic stations is extremely important for all studies related to network data. On other hand, availability such a large dataset site indicators offers possibility look statistical correlations between different indicators. In framework 2022-25 PRIN-SERENA project (&#8220;Mapping effects regional and national scale&#8221;, granted by Italian Ministry University Research), we use information archived in CRISP database relating more than...
Studies in urban areas are becoming increasingly important for the ground motion prediction, and represent a stimulating challenge due to presence of many uncontrolled variables: high variable level ambient noise, hidden geological features, underground services, limited open spaces geophysical investigations, urbanisation cultural heritage.&#160;We used data from 24 stations area Rome (Italy), belonging SPQR temporary seismic network operating January early April 2021...
In the framework of an Italian research project (2022-25 PRIN SERENA &#8220;Mapping Seismic Site Effects at Regional and National Scale&#8221;, granted by Ministry University Research), we aimed empirical verification calibration numerical ground-motion amplification maps developed within project, using in-depth geological, geophysical seismological information. For this purpose, a database experimental site-specific estimates (AFs) in three interval periods was created for more than...
Abstract This study presents the results of 90 seismic ambient noise measurements in Palermo, main city Sicily (Italy). The dataset has been processed using horizontal-to-vertical spectral ratio (HVNSR) technique and interpreted terms local geology, which is characterized by presence alluvial sediments two riverbeds masked urbanization since seventeenth century. HVNSRs show significant variations area: when transition stiff to soft crossed, a typical peak appears HVNSRs, mostly frequency...
<p>Rapid-response seismic networks are an important element in the response to crises. They temporarily improve detection performance of permanent monitoring systems during sequences. The improvement earthquake and location capabilities can be for decision makers assess current situation, provide invaluable data scientific studies related hazard, tectonics physics. Aftershocks clustering locations events help characterize dimensions causative fault. Knowing number, size timing...
<p>On May 20, 2012, at 02:03 UTC, a Ml 5.9 reverse-fault earthquake occurred in the Emilia-Romagna region, northern Italy, hypocentral depth of 6.3 km (http://iside.rm.ingv.it/), close to cities Modena and Ferrara plain Po River. The epicenter was near village Finale Emilia where macroseismic intensity assessed 7 EMS98 [Tertulliani et al. this issue], while closest accelerometric station, MRN, located less than 20 west-ward Mirandola (Figure 1) recorded peaks ground accelerations about...
Abstract We analyzed 12 years of continuous seismic data acquired by two stations in Central Apennines (Italy) with the aim to investigate temporal variations H/V spectral ratios. The are located epicentral areas main strong motion earthquakes occurred Italy last (L’Aquila 06 April 2009, Mw 6.1; Amatrice 24 August 2016, 6.0; Visso 26 October 5.9, and Norcia 30 6.5). ratios computed both on recorded stations. subjected abrupt changes after earthquakes. results highlight that shaking, there...
Abstract Near-fault seismic recordings for recent earthquakes (Chi Chi earthquake, 1999, and Parkfield 2004) show the high spatial heterogeneity of ground motion. This variability is controlled by fault geometry, rupture complexity, also wave propagation site effects. Nowadays, number available records in near-source region still not enough to infer a robust parameterization motion retrieve multiparametric predictive equations valid at close distances from fault. The use synthetic approach...
The largest dataset ever recorded during a normal fault seismic sequence was acquired the 2009 emergency triggered by damaging earthquake in L'Aquila (Italy). This possible through coordination of different rapid-response networks Italy, France and Germany. A network more than 60 stations up to 70,000 earthquakes. Here, we describe open-data archives where it is find this unique set data for studies related hazard, seismotectonics physics. Moreover, briefly some immediate direct applications...