XeRiS is a Web Application dedicated to the computation of the seismic input for user-defined source and structural models. The computational engine of XeRiS is based on the NDSHA (Neo-Deterministic Seismic Hazard Assessment) methodologies for the generation of synthetic seismograms.

It allows for a rapid definition of seismic and tsunami hazard scenarios for a given event, at local or regional scales. Neo-deterministic means scenario-based methods for seismic hazard analysis, where realistic and duly validated synthetic time series, accounting for source, propagation, and site effects, are used to construct the earthquake scenarios.

The user interface has been designed so to hide the intricacy of the underlying computational engine, yet it allows power users to act even on the very details of the model parameterisation.


A few quite important remarks on the stauts of XeRiS.

Do not reload page!

XeRiS does not like a page reload, or navigating through the browsing history with the back and forward buttons. Such actions will force the reload of the login page. This will be addressed in a future release.

Network health

In case of network connection issues, XeRiS may require the user to repeat the login procedure. Were there submitted jobs still running, their execution will not be interrupted, but the icon status in the panel selection button will no longer be in sync with the execution status. In any case, when a job will finish it will become available in the dedicated list.

“Missing” Panels

While the Help System describes the full capabilities of XeRiS, users must be aware that not all of the panels may be made available to them, on a case-by-case basis.

Current development

Some new functionalities are currently being implemented in XeRiS, and are made available upon request to interested users.


A full description of the methodology is available in:

  • Panza GF, Romanelli F, Vaccari F (2001). Seismic wave propagation in laterally heterogeneous anelastic media: Theory and applications to seismic zonation. Advances in Geophysics 43, 1–95.
  • Panza GF et al (2012) Seismic Hazard Scenarios as Preventive Tools for a Disaster Resilient Society. Advances in Geophysics 53:94–165.

A description of an early version of the XeRiS web application has been published here:

  • Vaccari F (2016). A web application prototype for the multiscale modelling of seismic input. In: Earthquakes and Their Impact on Society. Springer International Publishing, Cham., pp. 563–584.
  • Vaccari F, Magrin A, (2019). NDSHA - Computational Aspects of the Neo-Deterministic Seismic Hazard Assessment. In: Resilience and Sustainability of Cities in Hazardous Environments, 2019, pp. 202-212. GVES, Napoli – New York, ISBN 978-88-903183-1-3.

A selection of case studies and applications of the methodology can be found in:

  • Fasan M, Magrin A, Amadio C, Romanelli, F, Vaccari, F, Panza GF (2016). A seismological and engineering perspective on the 2016 Central Italy earthquakes. International Journal of Earthquake and Impact Engineering 1: 395–420.
  • Mourabit T, Abou Elenean KM, Ayadi A, Benouar D, Ben Suleman A, Bezzeghoud M, Cheddadi A, Chourak M, ElGabry MN, Harbi A, Hfaiedh M, Hussein HM, Kacem J, Ksentini A, Jabour N, Magrin A, Maouche S, Meghraoui M, Ousadou F, Panza GF, Peresan A, Romdhane N, Vaccari F, Zuccolo E (2013). Neo-deterministic seismic hazard assessment in North Africa. Journal of Seismology, p. 1-18, ISSN: 1383-4649, doi: 10.1007/s10950-013-9375-2.
  • Panza GF et al (2002). Realistic modeling of seismic input for megacities and large urban areas (the UNESCO/ IUGS/IGCP project 414). Episodes 25:160–184.
  • Romanelli F, Panza GF, Vaccari F (2004). Realistic Modelling of the Effects of Asynchronous motion at the Base of Bridge Piers. Journal of Seismology and Earthquake Engineering, vol. 6; p. 19-28, ISSN: 1735-1669.
  • Zuccolo E, Vaccari F, Peresan A, Panza GF (2011). Neo-deterministic and probabilistic seismic hazard assessments: a comparison over the Italian territory. Pure Appl. Geophys. 168, 69–83. DOI 10.1007/s00024-010-0151-8.