# QUIN 2.0 - new release of the QUaternary fault strain INdicators database from the Southern Apennines of Italy

## TL;DR

QUIN 2.0 is an updated geological database that expands the mapping of fault striation pairs in southern Italy to better understand seismic deformation patterns.

## Contribution

The new release significantly extends the geographic coverage and details of fault data in the Southern Apennines.

## Key findings

- QUIN 2.0 includes 4,297 fault striation pairs across 738 sites in southern Italy.
- The database provides detailed geometric-kinematic information for ~500 km of faults.
- It supports improved hazard assessment and understanding of fault rupture patterns.

## Abstract

QUIN database integrates and organizes structural-geological information from published and unpublished sources to constrain deformation in seismotectonic studies. The initial release, QUIN1.0, comprised 3,339 Fault Striation Pairs, mapped on 445 sites exposed along the Quaternary faults of central Italy. The present Data Descriptor introduces the QUIN 2.0 release, which includes 4,297 Fault Striation Pairs on 738 Structural Sites from southern Italy. The newly investigated faults span ~500 km along the Apennines chain, with strikes transitioning from ~SE to ~SW and comprehensively details Fault Striation Pairs’ location, attitude, kinematics, and deformation axes. Additionally, it offers a shapefile of the fault traces hosting the data. The QUIN 2.0 release offers a significant geographic extension to the QUIN 1.0, with comprehensive description of local geometric-kinematic complexities of the regional pattern. The QUIN data may be especially relevant for constraining intra-Apennine potential seismogenic deformation patterns, where earthquake data only offer scattered or incomplete information. QUIN’s data will support studies aimed at enhancing geological understanding, hazard assessment and comprehension of fault rupture propagation and barriers.