The NOAFAULTs database of active faults of Greece was first published in 2013 (versions 1.0 & 1.1; http://dx.doi.org/10.12681/bgsg.11079). The version 2.1 was published in 2018 http://doi.org/10.5281/zenodo.3483136). Version 3.0 was published in 2020 http://doi.org/10.5281/zenodo.4304613 NOAFAULTs was created towards compiling a digital database of fault geometry and additional attributes (kinematics, slip rate, associated seismicity etc.) primarily to support seismicity monitoring at the National Observatory of Athens (NOA). It has been constructed from published fault maps in peer-reviewed journals since 1972 while the number of the scientific papers that have contributed with fault data in version 4.0 is 127. The standard commercial software ARCGIS has been used to design and populate the database. The fault layer was produced by on-screen digitization of fault traces at the original map-scale and is available through our web portal application https://arcg.is/04Haer supported by ESRI. In this version, a number of 2751 active faults are included. 93% of the active faults are normal faults, 4% are strike-slip faults and only 3% represent the reverse faults. Also, reliable data on slip rates are available for 106 faults. Data on instrumental and historical seismicity are linked to 171 and 130 active faults, respectively. In addition, a) surface-rupturing geological data and b) data on the proximity of epicentres of strong seismic events to the traces of active faults allows the identification of 101 rupturing faults (seismic faults) that included in this version of the database. The NOAFAULTs database shows that nearly 52% of its active faults imply high seismic risk level in the broader area of Greece. These active faults can generate surface faulting or strong ground motions that can cause serious damage to buildings and infrastructures and therefore represent a significant hazard, particularly in the densely populated and industrialized areas of Greece. {"references": ["Ganas A., Oikonomou I.A. and Tsimi , 2013. NOAfaults: a digital database for active faults in Greece. Bulletin of the Geological Society of Greece, vol. 47 (2), 518-530, \u0394\u03b5\u03bb\u03c4\u03af\u03bf \u0395.\u0393.\u0395., \u03c4\u03cc\u03bc\u03bf\u03c2 XLVII - 13o \u0394\u03b9\u03b5\u03b8\u03bd\u03ad\u03c2 \u03a3\u03c5\u03bd\u03ad\u03b4\u03c1\u03b9\u03bf \u03c4\u03b7\u03c2 \u0395\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ae\u03c2 \u0393\u03b5\u03c9\u03bb\u03bf\u03b3\u03b9\u03ba\u03ae\u03c2 \u0395\u03c4\u03b1\u03b9\u03c1\u03af\u03b1\u03c2, \u03a7\u03b1\u03bd\u03b9\u03ac, 5-8 \u03a3\u03b5\u03c0\u03c4\u03b5\u03bc\u03b2\u03c1\u03af\u03bf\u03c5 2013 p.518-530, http://dx.doi.org/10.12681/bgsg.11079", "Ganas, A., Tsironi, V., Kollia, E., Delagas, M., Tsimi, Ch., Oikonomou, Ath. 2018. Recent upgrades of the NOA database of active faults in Greece (NOAFAULTs). 19th General Assembly of WEGENER, September 2018, Grenoble, sciencesconf.org:wegener2018:219400"]} The following contributors are gratefully acknowledged: Ms Varvara Tsironi MSc, Ms Eirini Efstathiou, Ms Elisavet Kollia MSc, Ms Christina Tsimi, MSc Dr. Sotiris Valkaniotis, Mr George Evangelou, Mr Michael Delagas, MSc, Ms Athanassia Oikonomou, Ms Fotini Kounavi MSc, Ms Vasiliki Kanavou, Ms Emmanuella Konstantakopoulou and Mr Vassilios Georgakopoulos.

The NOAFAULTs database of active faults of Greece was first published in 2013 (versions 1.0 & 1.1; http://dx.doi.org/10.12681/bgsg.11079). The version 2.1 was published in 2018 http://doi.org/10.5281/zenodo.3483136). NOAFAULTs was created towards compiling a digital database of fault geometry and additional attributes (kinematics, slip rate, associated seismicity etc.) primarily to support seismicity monitoring at the National Observatory of Athens (NOA). It has been constructed from published fault maps in peer-reviewed journals since 1972 while the number of the scientific papers that have contributed with fault data in version 3.0 is 114. The standard commercial software ARCGIS has been used to design and populate the database. The fault layer was produced by on-screen digitization of fault traces at the original map-scale and is available through our web portal application https://arcg.is/04Haer supported by ESRI. In this version, a number of 2472 active faults are included. 94% of the active faults are normal faults, 5% are strike-slip faults and only 1% represent the reverse faults. Also, reliable data on slip rates are available for 105 faults. Data on instrumental and historical seismicity are linked to 171 and 114 active faults, respectively. In addition, a) surface-rupturing geological data and b) data on the proximity of epicentres of strong seismic events to the traces of active faults allows the identification of 97 rupturing faults (seismic faults) that included in this version of the database. The NOAFAULTs database shows that nearly 52% of its active faults imply high seismic risk level in the broader area of Greece. These active faults can generate surface faulting or strong ground motions that can cause serious damage to buildings and infrastructures and therefore represent a significant hazard, particularly in the densely populated and industrialized areas of Greece. {"references": ["Ganas A., Oikonomou I.A. and Tsimi , 2013. NOAfaults: a digital database for active faults in Greece. Bulletin of the Geological Society of Greece, vol. 47 (2), 518-530, \u0394\u03b5\u03bb\u03c4\u03af\u03bf \u0395.\u0393.\u0395., \u03c4\u03cc\u03bc\u03bf\u03c2 XLVII - 13o \u0394\u03b9\u03b5\u03b8\u03bd\u03ad\u03c2 \u03a3\u03c5\u03bd\u03ad\u03b4\u03c1\u03b9\u03bf \u03c4\u03b7\u03c2 \u0395\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ae\u03c2 \u0393\u03b5\u03c9\u03bb\u03bf\u03b3\u03b9\u03ba\u03ae\u03c2 \u0395\u03c4\u03b1\u03b9\u03c1\u03af\u03b1\u03c2, \u03a7\u03b1\u03bd\u03b9\u03ac, 5-8 \u03a3\u03b5\u03c0\u03c4\u03b5\u03bc\u03b2\u03c1\u03af\u03bf\u03c5 2013 p.518-530, http://dx.doi.org/10.12681/bgsg.11079", "Ganas, A., Tsironi, V., Kollia, E., Delagas, M., Tsimi, Ch., Oikonomou, Ath. 2018. Recent upgrades of the NOA database of active faults in Greece (NOAFAULTs). 19th General Assembly of WEGENER, September 2018, Grenoble, sciencesconf.org:wegener2018:219400"]} The following contributors are gratefully acknowledged: Ms Varvara Tsironi MSc, Ms Elisavet Kollia MSc, Ms Christina Tsimi, MSc Dr. Sotiris Valkaniotis, Mr George Evangelou, Mr Michael Delagas, MSc, Ms Athanassia Oikonomou, Ms Fotini Kounavi MSc, Ms Vasiliki Kanavou, Ms Emmanuella Konstantakopoulou, and Ms Eirini Efstathiou,

The NOAFAULTs database of active faults of Greece was first published in 2013 (versions 1.0 & 1.1; http://dx.doi.org/10.12681/bgsg.11079). The version 2.1 was published in 2018 http://doi.org/10.5281/zenodo.3483136). Version 3.0 was published in 2020 http://doi.org/10.5281/zenodo.4304613 Version 4.0 was published in 2022 https://zenodo.org/record/6326260 NOAFAULTs was created towards compiling a digital database of fault geometry and additional attributes (kinematics, slip rate, associated seismicity etc.) primarily to support seismicity monitoring at the National Observatory of Athens (NOA). It has been constructed from published fault maps in peer-reviewed journals since 1972 while the number of the scientific papers that have contributed with fault data in version 5.0 is 140. The standard commercial software ARCGIS has been used to design and populate the database. The fault layer was produced at NOA by on-screen digitization of fault traces at the original map-scale and is available through our web portal application https://arcg.is/04Haer supported by ESRI. In this version, a number of 2916 active faults are included. 91% of the active faults are normal faults, 6% are strike-slip faults and only 3% represent the reverse faults. Also, reliable data on slip rates are available for 215 faults. Data on instrumental and historical seismicity are linked to 175 and 132 active faults, respectively. In addition, a) surface-rupturing geological data and b) data on the proximity of epicentres of strong seismic events to the traces of active faults allows the identification of 111 rupturing faults (seismic faults) that included in this version of the database. The NOAFAULTs database shows that nearly 54% of its active faults imply high seismic risk level in the broader area of Greece. These active faults can generate surface faulting or strong ground motions that can cause serious damage to buildings and infrastructures and therefore represent a significant hazard, particularly in the densely populated and industrialized areas of Greece.

The NOAFAULTs geospatial database of active faults of Greece was first published in 2013 at BGSG (versions 1.0 & 1.1; http://dx.doi.org/10.12681/bgsg.11079).

Version 2.1 was published in 2018 http://doi.org/10.5281/zenodo.3483136) Version 3.0 was published in 2020 http://doi.org/10.5281/zenodo.4304613 Version 4.0 was published in 2022 https://zenodo.org/record/6326260 Version 5.0 was published in 2023 https://doi.org/10.5281/zenodo.8075517 NOAFAULTs was created towards compiling a digital database of fault traces, geometry and additional attributes (kinematics, slip rate, associated seismicity etc.) primarily to support seismicity monitoring at the National Observatory of Athens (NOA). It has been constructed from published fault maps in peer-reviewed journals since 1972 while the number of the scientific papers that have contributed with fault data in version 6.0 is 145. The standard commercial software ARCGIS has been used to design and populate the database. The fault layer was produced at NOA by on-screen digitization of fault traces at the original map-scale (as drawn by the reference paper it was taken from) and is available through our web portal application https://arcg.is/04Haer supported by ESRI.

In this version, a number of 3088 active faults are included. 92% of the active faults are normal faults, 4% are strike-slip faults and only 3% represent the reverse faults. Also, reliable data on slip rates is available for 160 faults. Limited data on instrumental and historical seismicity are linked to 175 and 130 active faults, respectively. In addition, a) surface-rupturing geological data and b) data on the proximity of epicentres of strong seismic events to the traces of active faults allows the identification of 173 rupturing faults (seismic faults) that included in this version of the database. The NOAFAULTs database shows that nearly 52% of its active faults imply high seismic risk level in the broader area of Greece. These active faults can generate surface faulting or strong ground motions that can cause serious damage to buildings and infrastructures and therefore represent a significant hazard, particularly in the densely populated and industrialized areas of Greece.

Since 2022 NOAFAULTs has contributed to the EFSM20 database (https://www.seismofaults.eu/efsm20).

The NOAFAULTs database of active faults of Greece was first published in 2013 at BGSG (versions 1.0 & 1.1; http://dx.doi.org/10.12681/bgsg.11079). Version 2.1 (see map below) was published in 2018 http://doi.org/10.5281/zenodo.3483136); Version 3.0 was published in 2020 http://doi.org/10.5281/zenodo.4304613; Version 4.0 was published in 2022 https://zenodo.org/record/6326260 ; Version 5.0 was published in 2023 https://doi.org/10.5281/zenodo.8075517 ; Version 6.0 was published in 2024 https://zenodo.org/records/13168947 . NOAFAULTs was created towards compiling a digital database of fault traces, geometry and additional attributes (kinematics, slip rate, associated seismicity etc.) primarily to support seismicity monitoring at the National Observatory of Athens (NOA). It has been constructed from published fault maps in peer-reviewed journals since 1972 while the number of the scientific papers that have contributed with fault data in version 7.0 is 158. The standard commercial software ARCGIS has been used to design and populate the database. The fault layer was produced at NOA by on-screen digitization of fault traces at the original map-scale (as drawn by the reference paper it was taken from) and is available through our web portal application https://arcg.is/04Haer supported by ESRI.

In this version, in order to streamline the process, avoid inconsistencies during data input, and ensure a homogeneous database, we decided to automatically calculate certain fields from the attribute table. Specifically, the Strike and Dip-Direction fields were derived programmatically. First, the digitization of the faults was carried out to align with the dip-direction of each. With this method of digitization, the user also could apply a symbol to each fault that correctly corresponds to its dip-direction, enhancing the accuracy and interpretability of the fault representation. Then, by calculating the line bearing of the fault and applying a ±180° function to the result, the Strike was determined. Subsequently, using the calculated strike and appropriate functions, the Dip-Direction of each fault was generated. If the dip angle was not provided by the scientific source, we assigned standard values: 60° for Normal faults, 30° for Reverse faults, and 90° for Strike-Slip faults. Consequently, the Rake field was assigned values of -90° for Normal, 90° for Reverse, and 0° or 180° for Strike-Slip faults, depending on relative sense of motion.

Four new thematic layers were added to V7.0: the Sampling Sites layer, which includes locations from paleoseismological trenches and ³⁶CL sampling sites; the NOA Surface Rupture Database layer, which contains documented surface ruptures from field mapping ; and the Cyprus Faults layer, provided by the Cyprus Geological Survey Department (GSD[1]) , incorporated after initial evaluation and selection of specific features. Furthermore, the Focal Mechanisms layer from the NOA Gisola Catalogue (2012–2025) was updated to include data up to 3 June 2025, while the Strong Earthquakes in Greece since 1964 layer was updated with events up to 2 June 2025. In addition, one more station was added to the RING GNSS Network (INGV) layer, enhancing the coverage and detail of the database Moreover, the Rupture Plane of the 2020 Samos Earthquake (M7.0) was added.

Since 2022 NOAFAULTs has contributed to the EFSM20 database (https://www.seismofaults.eu/efsm20).