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| European Seismic Hazard Map | |
|---|---|
| Name | European Seismic Hazard Map |
| Region | Europe |
| Created | 1990s |
| Creators | European Seismological Commission, European Union, SHARE project |
| Scale | continental |
| Latest | multiple versions |
European Seismic Hazard Map
The European Seismic Hazard Map is a continental-scale depiction of probabilistic seismic hazard for Europe, synthesizing outputs from projects such as SHARE (Seismic Hazard Harmonization in Europe), the European Seismological Commission, and the Joint Research Centre (European Commission), and informing engineering codes like Eurocode 8, EN 1998, and national standards in Italy, Greece, Turkey, Spain, and France. It is used by agencies including the European Commission, the Global Seismographic Network, and national institutes such as the Institut de Physique du Globe de Paris, the Istituto Nazionale di Geofisica e Vulcanologia, and the British Geological Survey for risk assessment, urban planning, and insurance modeling involving corporations like Munich Re and Swiss Re.
The map aggregates seismicity, tectonic models, and ground-motion characterization across regions like the Alps, Apennines, Hellenic Arc, Iberian Peninsula, East European Plain, Caucasus, and Scandinavian Shield to present probabilistic ground shaking metrics for cities such as Rome, Athens, Istanbul, Lisbon, Paris, and London. Produced through collaboration among research centers including the GFZ German Research Centre for Geosciences, the INGV, the ETH Zurich, and universities like University of Oxford, University of Cambridge, and Sapienza University of Rome, the map supports legislation, building regulations, and emergency preparedness coordinated with organizations such as UNESCO and World Bank.
Data inputs derive from seismic catalogs maintained by institutions like the International Seismological Centre, the European-Mediterranean Seismological Centre, and national agencies including the National Observatory of Athens and Istanbul Kandilli Observatory. Geological and tectonic frameworks come from sources such as the European Geological Data Infrastructure, the Mediterranean Geoscience Union, and the Geological Survey of Finland, while paleoseismic studies from researchers at Columbia University and ETH Zurich contribute long-term rupture rates. Ground-motion prediction equations developed by groups including researchers from USGS, PEER (Pacific Earthquake Engineering Research Center), and ENEA are incorporated alongside site-condition databases from projects like Eurocode 8 site classifications and the European Soil Database.
Probabilistic seismic hazard analysis (PSHA) frameworks use fault-based models of features such as the North Anatolian Fault, the Alboran Sea Fault Zone, and the Dinarides combined with smoothed seismicity approaches applied to regions like the Pannonian Basin and the Rhine Graben. Key parameters include seismic source characterization from the European Seismic Hazard Model (ESHM), magnitude recurrence models influenced by the Gutenberg–Richter law studies by researchers at California Institute of Technology and ETH Zurich, and ground-motion prediction equations (GMPEs) calibrated against datasets from the Global Centroid-Moment-Tensor (GCMT) Catalog, the RESORCE and NGA-West2 projects. Hazard outputs are often expressed as peak ground acceleration (PGA), spectral acceleration (SA) at periods used by Eurocode 8 and hazard curves informing insurers like Lloyd's of London.
Map releases span initiatives including the Seismic Hazard Harmonization in Europe (SHARE) project, the European Seismic Hazard Model (ESHM20), and national revisions by agencies such as INGV and the BGS. Products vary from uniform hazard spectra for structural design to grid-based PGA maps at different return periods (e.g., 475-year, 2% in 50 years) used in Eurocode 8 and risk assessments by European Investment Bank. Versions differ by incorporated GMPE suites, seismic catalogs such as the ISC-GEM Global Instrumental Earthquake Catalogue, and tectonic interpretations by teams at GFZ, INGV, and University of Athens.
Planners and engineers apply the map to revise codes like Eurocode 8, retrofit portfolios of landmarks including Colosseum, Acropolis of Athens, and Belém Tower, and to prioritize seismic resilience projects financed by institutions such as the European Bank for Reconstruction and Development and the European Investment Bank. Insurers and reinsurers including AXA and Zurich Insurance Group use map outputs in catastrophe models along with exposure datasets from EM-DAT and NatCatSERVICE. Emergency management agencies like Civil Protection Department (Italy) and research consortia such as RiskPage employ the map to plan drills, resource allocation, and mitigation in seismic hotspots including Istanbul, Naples, and Lisbon.
Uncertainties stem from incomplete paleoseismic records in regions like the Caucasus and Aegean Sea, epistemic choices in GMPE selection debated by groups at USGS and PEER, and variability of site amplification captured imperfectly by EU datasets such as the European Soil Database. Model epistemic uncertainty is addressed by logic-tree frameworks developed by researchers at ETH Zurich, Imperial College London, and GFZ, yet aleatory variability in rupture processes observed in events like the 1999 İzmit earthquake and the 1755 Lisbon earthquake remains challenging. Political and administrative fragmentation across European Union member states and neighboring countries affects data sharing and homogeneity of national seismic catalogs managed by institutions like NOA and AFAD.
The concept originated in collaborative efforts during the late 20th century among organizations such as the European Seismological Commission and the Commission of the European Communities, with milestones including continental initiatives in the 1990s, development of probabilistic frameworks by groups at ETH Zurich and INGV, and major projects like SHARE and ESHM20. Influential earthquakes—1908 Messina earthquake, 1755 Lisbon earthquake, and 1980 Irpinia earthquake—and subsequent research by laboratories at Imperial College London, University of Bologna, and GFZ shaped methodologies, while ongoing contributions from the European Commission Joint Research Centre and national institutes continue to refine hazard depictions.