ALBERT

Description: Coseismic surface faulting associated to the 6 April 2009, Mw 6.1 L'Aquila earthquake from the joint analysis of the Istituto Nazionale di Geofisica e Vulcanologia (INGV) and of the Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA) field observations. The primary surface faulting reaches a total length of ca. 6 km and shows a ca. 3 km-long zone of continuous and consistently oriented surface ruptures in proximity of the village of Paganica, along a prominent NW-SE oriented, SW dipping normal fault. The deformation occurred in a ca. 500 m-wide zone. Secondary surface ruptures (antithetic and sympathetic) occurred along nearby faults. INGV - ISPRA joint database - 2009 L'Aquila earthquake surface rupture - Observation points: this file contains the tectonic ruptures observation points containing information about the typology, the geometrical characteristics, and a brief description of the observed feature. Credits: Blumetti et al., Report ISPRA 2009; Emergeo W.G., Terranova 2010 doi:10.1111/j.1365-3121.2009.00915.x; Cinti et al., JGR 2011 doi:10.1029/2010JB007988; Vittori et al., BSSA 2011 doi:10.1785/0120100140. INGV - ISPRA joint database - 2009 L'Aquila earthquake surface rupture - Surface faulting trace: this file displays as a line coverage the primary surface faulting associated to the 6 April 2009, Mw 6.1 L'Aquila earthquake. It is composed of multiple discrete rupture traces (mainly SW-facing free-faces and open cracks) with individual length ranging from 3 m to ca. 200 m. The traces are built based on the observation point layer, and contain information about the typology, the geometrical characteristics and the affected lithology (for this latter field attribute see Pucci et al., JoM 2015 doi:10.1080/17445647.2014.927128). INGV - ISPRA joint database - 2009 L'Aquila earthquake surface rupture - Secondary surface rupture trace: this file displays as a line coverage some of the secondary ruptures (antithetic and sympathetic) occurred along faults within the epicentral area.

Description: We provide a database of the coseismic surface ruptures produced by the 21 August 2017 Md 4.0 earthquake that struck the Casamicciola Terme village in the north of Ischia volcanic island (Italy). Despite its small size, the earthquake caused two fatalities and heavy damages in a restricted area of a few square kilometers. The shallow hypocentral depth of the earthquake caused a significant coseismic surface faulting, testified by a main alignment of ruptures mapped for a 2 km end-to-end length along the Casamicciola E-W trending normal fault system, bounding the northern slope of Mt. Epomeo. Casamicciola Terme has been recurrently destroyed in the last centuries by similar volcano-tectonic earthquakes (1762, 1767, 1796, 1828, 1881, and 1883). After the catastrophic 1883 Casamicciola event (2343 casualties), this is the first heavy damaging earthquake at Ischia that provides, for the first time, the opportunity of integrating historical seismicity, macroseismic observations, instrumental information, and detailed mapping of coseismic geological effects. We performed a detailed field surveys in the epicentral region of the 21 August earthquake to describe the ruptures geometry and kinematics of the seismogenetic fault responsible of the earthquake with the aim of contributing to the seismic hazard evaluation and land use planning in the Ischia island, one of the most crowded touristic destinations worldwide. Summarizing our study of ground effects for the 21 August 2017 earthquake is important for improving knowledge on surface earthquake in the volcanic area and contributing to complete the gap of empirical scaling relating to the surface-faulting mechanism due to small-size or moderate earthquakes in volcano-tectonic framework. The collected field observations result in a dataset of 88 georeferenced records describing coseismic ruptures/fractures by features as ID number, time of sample collection, location (latitude, longitude, elevation), type of rupture, type of affected substratum, attitude (dip angle, dip direction, strike), surface offset (opening, throw, strike slip, net slip), kinematics, slip vector attitude, width of the deformation zone.

Description: We provide a database of the coseismic surface ruptures produced by the 26 December 2018 Mw 4.9 earthquake that struck the eastern flank of Mt. Etna (southern Italy), the largest active volcano in Europe. Despite its small size, this shallow earthquake caused an impressive system of coseismic surface ruptures extending about 8.5 km, along the trace of the NNW-trending active Fiandaca Fault. We performed detailed field surveys were performed in the epicentral region to describe the ruptures geometry and kinematics. These exhibit a dominant right-oblique sense of slip with coseismic displacement peaks of 0.35 m. The Fiandaca Fault is part of a complex active faults system affecting the eastern flank of Mt. Etna. Its seismic history indicates a prominent surface-faulting potential, so our study is essential for unravelling the seismotectonics of shallow earthquakes in volcanic settings, and contributes updating empirical scaling laws relating moderate-sized earthquakes and surface faulting. The collected observations have been parsed and organized in a concise database consisting of 874 homogeneous georeferenced records. The main features describing the coseismic ruptures are the following: ID, time of sample collection, location (latitude, longitude, elevation), type of rupture, type of affected substratum, attitude (dip angle, dip direction, strike), surface offset (opening, throw, strike slip, net slip), kinematics, slip vector attitude, width of the deformation zone.

Description: We provide a database that embodies more than 7000 punctual observations of the coseismic surface geological effects following the 30 October 2016 Mw 6.5 earthquake that hit central Italy. This earthquake caused widespread surface ruptures over a 〉400 km2-wide mountainous area. The Open EMERGEO Working Group, originated by the collaboration of several European geological survey teams coordinated by the Istituto Nazionale di Geofisica e Vulcanologia, involved about 130 researchers to perform detailed geological field surveys in the epicentral region. These observations mostly include accurate description of the geometry and kinematics of ground breaks caused by primary surface faulting, and subordinately by landslides due to shaking. The database consists of georeferenced records containing both numeric and string fields in the form of a suitable .txt file.

Description: This dataset gathers all the published existing information on the coseismic surface ruptures produced by the Mw 6.9 earthquake that struck the Irpinia region (southern Italy) on the 23rd November 1980. The dataset is the sum of the observations made by several authors over the years (e.g., Carmignani et al., 1981, Westaway and Jackson, 1984, Pantosti and Valensise, 1990, Blumetti et al., 2002). The data were collected during field surveys carried out from right after the event till 2021 and were integrated by aerial photo interpretation. The most recent surveys by the authors of this database were focused on the evaluation, repositioning through GNSS handheld devices, and validation in the field of the observation points to overcome unprecise manual positioning of pre-GNSS times. The observations are organized in a database of 175 homogenous georeferenced points and 49 georeferenced lines (coseismic ruptures). The points data are available in .xlsx meanwhile the lines are available in .shp format. Each point is described by the following parameters, when available: Observation type, Latitude, Longitude, Elevation, Throw, Strike, Dip, References, Ranking, Comment, and Bibliography. The ranking assigned to each coseismic feature is based, with integrations, on Baize et al. 2021. Each feature is attributed to two ranking values, one referring to the compilers of this database and the other to the original author's interpretation. The scores are 1 to 4: 1) principal faulting; 2) simple distributed faulting; 3) sympathetic faulting; 4) ground shaking or shaking/gravity-induced slip (category assigned in this work). The lines are described by Type of observation, Uncertainty, Strike, Downthrow Side, Ranking, Comment, and Bibliography. The ranking values are the same as above. The downthrow side value for each line is the mode of the observation points located on the line itself. As a consequence of the different ages and origins of the data, including the variable scaling of the surveys, we have built the dataset at different scales; we suggest looking at the project at the scale spanning from 1:5.000 to 1:10.000.