{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,12]],"date-time":"2025-11-12T14:09:20Z","timestamp":1762956560323,"version":"build-2065373602"},"reference-count":54,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,4,30]],"date-time":"2021-04-30T00:00:00Z","timestamp":1619740800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Union and Greek national funds","award":["SafeSchools\u2013T1EDK-01679","HELPOS-MIS5002697"],"award-info":[{"award-number":["SafeSchools\u2013T1EDK-01679","HELPOS-MIS5002697"]}]},{"name":"Italian Ministry of Economical Development","award":["MISE DGISSEG-INGV 2020"],"award-info":[{"award-number":["MISE DGISSEG-INGV 2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The active collision of the Apulian continental lithosphere with the Eurasian plate characterizes the tectonics of the Epirus region in northwestern Greece, invoking crustal shortening. Epirus has not experienced any strong earthquakes during the instrumental era and thus there is no detailed knowledge of the way the active deformation is being expressed. In March 2020, a moderate size (Mw 5.8) earthquake sequence occurred close to the Kanallaki village in Epirus. The mainshock and major aftershock focal mechanisms are compatible with reverse faulting, on NNW-ESE trending nodal planes. We measure the coseismic surface deformation using radar interferometry and investigate the possible fault geometries based on seismic waveforms and InSAR data. Slip distribution models provide good fits to both nodal planes and cannot resolve the fault plane ambiguity. The results indicate two slip episodes for a 337\u00b0 N plane dipping 37\u00b0 to the east and a single slip patch for a 137\u00b0 N plane dipping 43\u00b0 to 55\u00b0 to the west. Even though the area of the sequence is very close to the triple junction of western Greece, the Kanallaki 2020 activity itself seems to be distinct from it, in terms of the acting stresses.<\/jats:p>","DOI":"10.3390\/rs13091752","type":"journal-article","created":{"date-parts":[[2021,4,30]],"date-time":"2021-04-30T10:53:29Z","timestamp":1619780009000},"page":"1752","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Earthquake Source Investigation of the Kanallaki, March 2020 Sequence (North-Western Greece) Based on Seismic and Geodetic Data"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8544-1934","authenticated-orcid":false,"given":"Nikos","family":"Svigkas","sequence":"first","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9277-8893","authenticated-orcid":false,"given":"Anastasia","family":"Kiratzi","sequence":"additional","affiliation":[{"name":"Department of Geophysics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece"}]},{"given":"Andrea","family":"Antonioli","sequence":"additional","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5031-9904","authenticated-orcid":false,"given":"Simone","family":"Atzori","sequence":"additional","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7378-0712","authenticated-orcid":false,"given":"Cristiano","family":"Tolomei","sequence":"additional","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]},{"given":"Stefano","family":"Salvi","sequence":"additional","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0506-3492","authenticated-orcid":false,"given":"Marco","family":"Polcari","sequence":"additional","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8632-9979","authenticated-orcid":false,"given":"Christian","family":"Bignami","sequence":"additional","affiliation":[{"name":"Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Valkaniotis, S., Briole, P., Ganas, A., Elias, P., Kapetanidis, V., Tsironi, V., Fokaefs, A., Partheniou, H., and Paschos, P. (2020). The Mw = 5.6 Kanallaki Earthquake of 21 March 2020 in West Epirus, Greece: Reverse Fault Model from InSAR Data and Seismotectonic Implications for Apulia-Eurasia Collision. Geosciences, 10.","DOI":"10.20944\/preprints202008.0590.v1"},{"key":"ref_2","first-page":"2653","article-title":"The 21 March 2020, Mw 5.7 Epirus (Greece) Earthquake","volume":"17","author":"Lekkas","year":"2020","journal-title":"Newsl. Environ. Disaster Crises Manag. Strateg."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"178","DOI":"10.1080\/17445647.2018.1445562","article-title":"Neotectonic study of Northwestern Greece","volume":"14","author":"Ntokos","year":"2018","journal-title":"J. Maps"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"279","DOI":"10.1016\/0012-821X(83)90141-3","article-title":"Microearthquake seismicity and active tectonics of the northwestern Greece","volume":"66","author":"King","year":"1983","journal-title":"Earth Planet. Sci. Lett."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"773","DOI":"10.1029\/95TC00839","article-title":"Microseimicity and strain pattern in northwestern Greece","volume":"14","author":"Hatzfeld","year":"1995","journal-title":"TECTONICS"},{"key":"ref_6","first-page":"161","article-title":"Microearthquake survey in the Steno dam site in northwestern Greece","volume":"5","author":"Kiratzi","year":"1987","journal-title":"Ann. Geophys."},{"key":"ref_7","unstructured":"IGRS\u2013IFP (Institut de G\u00e9ologie et Recherches du Sous-Sol, Ath\u00e8nes\u2013Institut Fran\u00e7ais du P\u00e9trole) (1966). Etude G\u00e9ologique de l\u2019Epire (Gr\u00e8ce Nord-occidentale), Editions Technip."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Stanley, J.D., and Wezel, F.C. (1985). Geophysics and geodynamic implications for the evolution of the Hellenides. Geological Evolution of the Mediterranean Basin, Springer.","DOI":"10.1007\/978-1-4613-8572-1"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1706","DOI":"10.1785\/0120020086","article-title":"Seismicity and Seismotectonics in Epirus, Western Greece: Results from a Microearthquake Survey","volume":"96","author":"Tselentis","year":"2006","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Beer, M., Kougioumtzoglou, I.A., Patelli, E., and Siu-Kui Au, I. (2015). Mechanisms of Earthquakes in Aegean. Encyclopedia of Earthquake Engineering, Springer.","DOI":"10.1007\/978-3-642-35344-4"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"228353","DOI":"10.1016\/j.tecto.2020.228353","article-title":"Seismicity and geodynamics of western Peloponnese and central Ionian Islands: Insights from a local seismic deployment","volume":"778","author":"Haddad","year":"2020","journal-title":"Tectonophysics"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"967","DOI":"10.1007\/s00531-016-1345-9","article-title":"Transition from collision to subduction in Western Greece: The Katouna-Stamna active fault system and regional kinematics","volume":"106","author":"Braucher","year":"2017","journal-title":"Int. J. Earth Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.tecto.2008.02.009","article-title":"The April 2007 earthquake swarm near Lake Trichonis and implications for active tectonics in western Greece","volume":"452","author":"Kiratzi","year":"2008","journal-title":"Tectonophysics"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"388","DOI":"10.1007\/BF00880738","article-title":"Evidence for transform faulting in the Ionian Sea: The Cephalonia Island earthquake sequence of 1983","volume":"123","author":"Scordilis","year":"1985","journal-title":"PAGEOPH"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1016\/S0040-1951(99)00078-5","article-title":"The Cephalonia Transform Fault and its continuation to westernLefkada Island","volume":"308","author":"Louvari","year":"1999","journal-title":"Tectonophysics"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Kostoglou, A., Karakostas, V., Bountzis, P., and Papadimitriou, E. (2020). \u03a4he February\u2013March 2019 Seismic Swarm Offshore North Lefkada Island, Greece: Microseismicity Analysis and Geodynamic Implications. Appl. Sci., 10.","DOI":"10.20944\/preprints202005.0412.v1"},{"key":"ref_17","unstructured":"Caputo, R., and Pavlides, S. (2021, January 05). The Greek Database of Seismogenic Sources (GreDaSS), Version 2.0.0: A Compilation of Potential Seismogenic Sources (Mw > 5.5) in the Aegean Region 2013. Available online: http:\/\/gredass.unife.it\/."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1130\/0016-7606(1993)105<0137:TLGAAT>2.3.CO;2","article-title":"The landscape geometry and active tectonics of the northwest Greece","volume":"105","author":"King","year":"1993","journal-title":"Geol. Soc. Am. Bull."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"875","DOI":"10.1785\/0120000116","article-title":"Northwestern Turkey earthquakes and the structure inferred from surface waves observed in Western Greece","volume":"91","author":"Tselentis","year":"2001","journal-title":"Bull. Seismol. Soc. Amer."},{"key":"ref_20","unstructured":"Dreger, D.S. (2002). Time-Domain Moment Tensor INVerse Code (TDMT INVC) Version 1.1., 18, Berkeley Seismological Laboratory."},{"key":"ref_21","unstructured":"Lee, W.H.K., Kanamori, H., Jennings, P.C., and Kisslinger, C. (2002). TDMT INV: Time domain seismic moment tensor INVersion. International Handbook of Earthquake and Engineering Seismology, Academic Press."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Amico, S.D. (2018). Berkeley seismic moment tensor method, uncertainty analysis, and study of non-double-couple seismic events. Moment Tensor Solutions, Springer Natural Hazards.","DOI":"10.1007\/978-3-319-77359-9"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1941","DOI":"10.1029\/1999GL011245","article-title":"Seismic remote sensing for the earthquake source process and near-source strong shaking: A case study of the 16 October 1999 Hector Mine earthquake","volume":"27","author":"Dreger","year":"2000","journal-title":"Geophys. Res. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1266","DOI":"10.1785\/0120000907","article-title":"The Combined Inversion of Seismic and Geodetic Data for the Source Process of the 16 October 1999 M 7.1 Hector Mine, California, Earthquake","volume":"92","author":"Kaverina","year":"2002","journal-title":"Bull. Seism. Soc. Am."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1093\/gji\/ggu224","article-title":"Iterative joint inversion for stress and fault orientations from focal mechanisms","volume":"199","year":"2014","journal-title":"Geophys. J. Int."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1086\/625831","article-title":"Geometry of shearing stress and relation to faulting","volume":"59","author":"Wallace","year":"1951","journal-title":"J. Geol."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1017\/S0016756800059987","article-title":"The mechanics of oblique slip faulting","volume":"96","author":"Bott","year":"1959","journal-title":"Geol. Mag."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"319","DOI":"10.2113\/gssgfbull.184.4-5.319","article-title":"A review of methods for determining stress fields from earthquake focal mechanisms: Application to the Sierentz 1980 seismic crisis (Upper Rhine graben)","volume":"184","author":"Maury","year":"2013","journal-title":"Bull. Soc. Geol. Fr."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Beer, M. (2015). Earthquake mechanisms and stress field. Encyclopedia of Earthquake Engineering, Springer.","DOI":"10.1007\/978-3-642-35344-4"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"11517","DOI":"10.1029\/JB089iB13p11517","article-title":"Determination of stress from slip data: Faults and folds","volume":"89","author":"Michael","year":"1984","journal-title":"J. Geophys. Res."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1029\/JB092iB01p00357","article-title":"Use of focal mechanisms to determine stress: A control study","volume":"92","author":"Michael","year":"1987","journal-title":"J. Geophys. Res."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"14947","DOI":"10.1029\/1999JB900111","article-title":"Stress tensor inversion using detailed microearthquake information and stability constraints: Application to \u00d6lfus in southwest Iceland","volume":"104","author":"Lund","year":"1999","journal-title":"J. Geophys. Res."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1997","DOI":"10.1007\/s00024-018-1792-2","article-title":"Tectonic stress regime in the 2003\u20132004 and 2012\u20132015 earthquake swarms in the Ubaye Valley, French Alps","volume":"175","author":"Fojtikova","year":"2018","journal-title":"Pure Appl. Geophys"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"333","DOI":"10.1016\/j.jsames.2015.07.020","article-title":"Focal mechanisms and moment magnitudes of micro-earthquakes in central Brazil by waveform inversion with quality assessment and inference of the local stress field","volume":"71","author":"Carvalho","year":"2016","journal-title":"J. South Am. Earth Sci."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1038\/scientificamerican0297-46","article-title":"Satellite radar interferometry","volume":"276","author":"Massonnet","year":"1997","journal-title":"Sci. Am."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1029\/97RG03139","article-title":"Radar interferometry and its application to changes in the Earth\u2019s surface","volume":"36","author":"Massonnet","year":"1998","journal-title":"Rev. Geophys."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"4035","DOI":"10.1029\/1998GL900033","article-title":"Radar Interferogram filtering for geophysical applications Radar interferogram filtering for geophysical applications. Geophys","volume":"25","author":"Goldstein","year":"1998","journal-title":"Res. Lett."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"813","DOI":"10.1109\/36.673674","article-title":"A novel phase unwrapping method based on network programming","volume":"36","author":"Costantini","year":"1998","journal-title":"Geosci. Remote Sens."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"583","DOI":"10.1029\/EO081i048p00583","article-title":"Shuttle radar topography mission produces a wealth of data","volume":"81","author":"Farr","year":"2000","journal-title":"EOS Trans. Am. Geophys. Un."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"2008","DOI":"10.1002\/2016JD025753","article-title":"Generation of real-time mode high resolution water vapor fields from GPS observations","volume":"122","author":"Yu","year":"2017","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Yu, C., Li, Z., Penna, N.T., and Crippa, P. (2018). Generic atmospheric correction model for Interferometric Synthetic Aperture Radar observations. J. Geophys. Res. Solid Earth, 123.","DOI":"10.1029\/2017JB015305"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/j.rse.2017.10.038","article-title":"Interferometric synthetic aperture radar atmospheric correction using a GPS-based iterative tropospheric decomposition model","volume":"204","author":"Yu","year":"2018","journal-title":"Remote Sens. Environ."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1090\/qam\/10666","article-title":"A method for the solution of certain problems in least squares","volume":"2","author":"Levenberg","year":"1944","journal-title":"Q. Appl. Math."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1137\/0111030","article-title":"An algorithm for least-squares estimation of nonlinear parameters","volume":"11","author":"Marquardt","year":"1963","journal-title":"SIAM J. Appl. Math."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1135","DOI":"10.1785\/BSSA0750041135","article-title":"Surface deformation due to shear and tensile faults in a half-space","volume":"75","author":"Okada","year":"1985","journal-title":"Bull. Seism. Soc. Am."},{"key":"ref_46","first-page":"15305","article-title":"Finite fault inversion of DInSAR coseismic displacement of the 2009 L\u2019Aquila earthquake (central Italy)","volume":"36","author":"Hunstad","year":"2009","journal-title":"Geophys. Res. Lett."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"08305","DOI":"10.1029\/2012JB009178","article-title":"The 2010\u20132011 Canterbury, New Zealand, seismic sequence: Multiple source analysis from InSAR data and modeling","volume":"117","author":"Atzori","year":"2012","journal-title":"J. Geophys. Res."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"111461","DOI":"10.1016\/j.rse.2019.111461","article-title":"InSAR full-resolution analysis of the 2017\u20132018 M > 6 earthquakes in Mexico","volume":"234","author":"Atzori","year":"2019","journal-title":"Remote Sens. Environ."},{"key":"ref_49","unstructured":"Menke, W. (1989). Geophysical Data Analysis: Discrete Inverse Theory, Academic Press."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Papazachos, B.C., Scordilis, E.M., Panagiotopoulos, D.G., Papazachos, C.B., and Karakaisis, G.F. (2004). Global relations between seismic fault parameters and moment magnitude of earthquakes. Bull. Geol. Soc. Greece, 36.","DOI":"10.12681\/bgsg.16538"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/j.jog.2018.11.004","article-title":"Contemporary crustal stress of the Greek region deduced from earthquake focal mechanisms","volume":"123","author":"Kapetanidis","year":"2019","journal-title":"J. Geodyn."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"506","DOI":"10.1002\/2016JB013272","article-title":"Present-day crustal stress field in Greece inferred from regional-scale damped inversion of earthquake focal mechanisms","volume":"122","author":"Konstantinou","year":"2017","journal-title":"J. Geophys. Res. Solid Earth"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"6137","DOI":"10.1002\/2016GL069427","article-title":"Asperity break after 12 years: The Mw6.4 2015 Lefkada (Greece) earthquake","volume":"43","author":"Sokos","year":"2016","journal-title":"Geophys. Res. Lett."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.pepi.2016.05.012","article-title":"A new database of source time functions (STFs) extracted from the SCARDEC method","volume":"257","author":"Douet","year":"2016","journal-title":"Phys. Earth Planet. Inter."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/9\/1752\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:56:17Z","timestamp":1760162177000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/9\/1752"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,4,30]]},"references-count":54,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2021,5]]}},"alternative-id":["rs13091752"],"URL":"https:\/\/doi.org\/10.3390\/rs13091752","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2021,4,30]]}}}