Research Article| March 11, 2015 Macroseismic Intensity Assessment Method for Web Questionnaires Patrizia Tosi; Tosi aIstituto Nazionale di Geofisica e Vulcanologia, Via Vigna Murata 605, 00143 Roma, Italypatrizia.tosi@ingv.it Search other works by this author on: GSW Google Scholar Paola Sbarra; Sbarra Valerio De Rubeis; Rubeis Clarissa Ferrari bUnit of Psychiatry, Istituto Ricovero Cura a Carattere Scientifico, Pilastroni 4, 25125 Brescia, Italy Author and Article Information Publisher:...

Sound is an effect produced by almost all earthquakes. Using a web‐based questionnaire on earthquake effects that included questions relating to seismic sound, we collected 77,000 responses for recent shallow Italian An analysis of audibility attenuation indicated the decrease percentage respondents hearing sound was proportional logarithm epicentral distance and linearly dependent magnitude, in accordance with behavior ground displacement. Even if this result based data, qualitative...

Abstract. The Italian historical earthquake record is among the richest worldwide; as such it allows for development of advanced techniques retrieving quantitative information by calibration with recent earthquakes. Building on a pilot elaboration northern earthquakes, we developed procedure determining hypocentral depth all earthquakes from macroseismic intensity data alone. In second step calculates their magnitude, taking into account inferred depth. Hypocentral exhibits substantial...

Three are the essential parameters needed to describe seismicity: b ‐value of Gutenberg‐Richter relation and spatial temporal fractal dimensions ( D s t ). Several cases have been reported when a significant decrease in or dimension preceded major earthquake sequences aftershocks. Here we use method based on correlation integral study changes (2‐D) distribution earthquakes three important seismic zones Italy. In all shows variability, which correlates well with events clearly marks beginning...

A model for fault dynamics consisting of two rough and rigid Brownian profiles that slide one over the other is introduced. An earthquake occurs when there an intersection between profiles. The energy released proportional to overlap interval. Our exhibits some specific features which follow from fractal geometry fault: (1) nonuniversality exponent Gutenberg-Richter law magnitude distribution, (2) presence local stress accumulation before a large seismic event, (3) nontrivial space-time...

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...

Abstract Determining the hypocentral depth of pre-instrumental earthquakes is a long-standing geophysical issue that still awaits to be elucidated. Using very well documented recent we found crustal and upper-mantle events correlates with slope first 50 km their intensity attenuation curve, regardless magnitude. We used this observation build magnitude-independent method for calculating selected historical early-instrumental northern Italy based on macroseismic field. Our relies both...

Abstract A large amount of data about earthquake effects, supplied by citizens through a web-based questionnaire, enabled the analysis occurrence many effects on humans and objects listed in macroseismic scales descriptions. Regarding other diagnostic (rattling, moving, shifting, falling or overturning depending object type doors, windows, china, glasses, small objects, pictures, vases, books, as well frightened people animal behaviour), from more than 300,000 questionnaires earthquakes felt...

Research Article| March 01, 2014 How Observer Conditions Impact Earthquake Perception Paola Sbarra; Sbarra Istituto Nazionale di Geofisica e Vulcanologia, Via Vigna Murata 605, 00143 Rome, Italypaola.sbarra@ingv.it Search for other works by this author on: GSW Google Scholar Patrizia Tosi; Tosi Valerio De Rubeis Author and Article Information Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1938-2057 Print 0895-0695 © the Letters (2014) 85 (2): 306–313....

Time properties of seismic activity the Etna Volcano (Italy) from 1874 to 1913, are investigated by fractal dimension analysis. Period selection was due interesting volcanic and which had occurred within this time interval. A catalogue adopted, revised reexamination historical sources with addition new material. evolution temporal D t , calculated on a 40 events moving window, revealed following correlations eruptive processes: long term variations magma rise depth; mid closely related...

Earthquake sounds are heard during or immediately before an event up to several kilometres around the epicentral area. Sound data as by people have been collected way of macroseismic questionnaires, showing that sound audibility does not follow isotropic patterns. The explanation this effect is found in behaviour particular radiation pattern P‐waves for each earthquake, connection with its focal mechanism. This result opens possibility get more information about earthquake source parameters...

Spatial analysis, involving experimental semivariogram evaluation and kriging interpolation, is performed on macroseismic intensity data assumed to represent a regionalized variable. A modeled, showing that components act at different scale levels. Interpretation of the in terms fractal dimension allows separation error component from other scale-dependent components. Use an objective best spatial-range determination for filtering eliminates subjective choice usually based data-sampling...

Scale invariant properties of seismicity argue for the presence complex triggering mechanisms. We propose a new method, based on space-time combined generalization correlation integral, that leads to self-consistent visualization and analysis both spatial temporal correlations. The has been applied global medium-high seismicity. Results show earthquakes do interact even long distances are correlated in time within defined ranges varying over elapsed time. On base we redefine aftershock concept.

Seismicity is a complex process featuring non-trivial space–time correlations in which several forms of scale invariance have been identified. A frequently used method to detect scale-invariant features the correlation integral, leads definition dimension separately space and time. In this paper, we generalize with combined integral. This approach allows us analyse medium-strong seismicity as point process, without any distinction among main, after or background shocks. The analyses...

Research Article| March 01, 2012 Influence of Observation Floor and Building Height on Macroseismic Intensity Paola Sbarra; Sbarra Istituto Nazionale di Geofisica e Vulcanologia Via Vigna Murata 605, 00143 Rome, Italypaola.sbarra@ingv.it (P. S.) 1Istituto Vulcanologia, Italy Search for other works by this author on: GSW Google Scholar Patrizia Tosi; Tosi Valerio De Rubeis; Rubeis Antonio Rovelli Seismological Letters (2012) 83 (2): 261–266. https://doi.org/10.1785/gssrl.83.2.261 Article...

We investigate the influence of building height on ability people to feel earthquakes and observe that, in an urban area, short tall buildings reach different levels excitation. quantify this behavior by analyzing macroseismic reports collected from individuals through Internet; we focus elastic regime transitory effects recent Italy local magnitude ( M L) range 3–5.9. find a maximum difference 0.6 intensity units between top floors (7–10 stories) (1–2 at highest considered magnitudes. As...

Abstract The lower degrees of the macroseismic scales are estimated mainly using diagnostic related to percentage people who felt earthquake (“felt” percentage). However, estimating this by examining only a sub-sample may be biased, as those complete questionnaires predominantly have earthquake. One way solve problem is send specific request them when an occurs. ‘Hai Sentito il Terremoto’ (HSIT) site began implementing strategy in December 2008 allowing users register on website. Thanks...

A new method of macroseismic survey, based on voluntary collaboration through the internet, has been running at Istituto Nazionale di Geofisica e Vulcanologia (INGV), Italy, since June 2007. The questionnaire is addressed to a single nonspecialist person and reported effects are statistically analysed extrapolate Mercalli-Cancani-Sieberg (MCS) scale European Macroseismic Scale (EMS) intensity referred by that observer. Maps displayed online in almost real time continuously updated. aim...

From 08/01/1983 to 28/03/1990, at the Bishkek ElectroMagnetic (EM) test site (Northern Tien Shan and Chu Valley area, Central Asia), strong currents, up 2.5 kA, were released a 4.5 km long electrical (grounded) dipole. This area is seismically active catalogue with about 14100 events from 1975 1996 has been analyzed. The seismic was divided into three parts: 1975-1983 first part no EM experiments, 1983-1990 second during experiments 1988-1996 after part. Qualitative quantitative time series...

Correction| June 24, 2015 Macroseismic Intensity Assessment Method for Web Questionnaires Patrizia Tosi; Tosi Search other works by this author on: GSW Google Scholar Paola Sbarra; Sbarra Valerio De Rubeis; Rubeis Clarissa Ferrari Seismological Research Letters (2015) 86 (4): 1197. https://doi.org/10.1785/0220150127 Article history first online: 14 Jul 2017 Connected Content Errata: Cite View This Citation Add to Manager Share Icon Facebook Twitter LinkedIn MailTo Tools Get Permissions Site...