{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:28:43Z","timestamp":1760149723103,"version":"build-2065373602"},"reference-count":77,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2023,9,12]],"date-time":"2023-09-12T00:00:00Z","timestamp":1694476800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Portuguese Foundation for Science and Technology (FCT)","award":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"],"award-info":[{"award-number":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"]}]},{"name":"COMPETE 2020 program","award":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"],"award-info":[{"award-number":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"]}]},{"name":"Portugal2020","award":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"],"award-info":[{"award-number":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"]}]},{"name":"CERU (Centro Europeu de Riscos Urbanos)","award":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"],"award-info":[{"award-number":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"]}]},{"name":"MOZ3-5\/PAMELA","award":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"],"award-info":[{"award-number":["UIDB\/04683\/2020","POCI-01-0145- FEDER-007690","22151\/01\/SAICT\/2016","Ifremer 15\/1212119\/"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The Arraiolos Zone has been affected by the persistent superficial seismicity (focal depth &lt; 20 km) of a weak magnitude (M &lt; 4) and some events of a higher magnitude (M &gt; 4), and is mainly located around the Aldeia da Serra village. On 15 January 2018, at 11:51 UTC, the largest instrumental earthquake recorded in that area occurred, with a magnitude (ML 4.9) located northeast of Arraiolos, near the Aldeia da Serra village. This event was followed by a sequence of aftershocks with a magnitude (ML) \u2264 3.5. This seismic sequence was monitored by the designated temporary seismic network of Arraiolos, comprising 12 broadband seismic stations (CMG 6TD, 30 s) from the ICT (Institute of Earth Sciences, \u00c9vora) and 21 short-period stations (CDJ 2.0 Hz) from the IDL (Instituto Dom Luiz), distributed around the epicenter, within a radius of approximately 25 km. To infer the structure and kinematics of faults at depth and to constrain the crustal stress field in which the earthquakes occur, we use the polarities of the first P-wave arrivals and the S\/P amplitude ratios to better constrain the focal mechanisms of 54 events selected, and apply the HASH algorithm. Overall, the good-quality (defined by the HASH parameters) focal solutions are characterized by a mixture of reverse and strike-slip mechanisms in our study area (AZS). Our seismicity and focal mechanism results suggest that the horizontal stress is more dominant than the vertical one and oriented in the NW\u2013SE direction, parallel with the strike of the main faults. This analysis leads us to affirm that the ASZ is an active right-lateral shear zone.<\/jats:p>","DOI":"10.3390\/rs15184494","type":"journal-article","created":{"date-parts":[[2023,9,12]],"date-time":"2023-09-12T21:41:12Z","timestamp":1694554872000},"page":"4494","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Seismic Sequence Analysis of the Arraiolos Zone, South Portugal, and Its Seismotectonic Implications: A Detailed Analysis of the Period 15 January\u201330 June 2018"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5659-327X","authenticated-orcid":false,"given":"Piedade","family":"Wachilala","sequence":"first","affiliation":[{"name":"Higher Institute of Education Science of the Hu\u00edla\u2014ISCED-Hu\u00edla, Department of Teaching and Investigation of Exact and Natural Sciences, Sarmento Rodrigues Street, N\u00ba. 2, Lubango P.O. Box 230, Angola"},{"name":"Instituto de Ci\u00eancias da Terra (ICT), Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3847-6536","authenticated-orcid":false,"given":"Jos\u00e9","family":"Borges","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancias da Terra (ICT), Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"},{"name":"Departamento de F\u00edsica, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"},{"name":"Earth and Remote Sensing Laboratory (EARSLab), University of \u00c9vora, 7004-516 \u00c9vora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4745-6972","authenticated-orcid":false,"given":"Bento","family":"Caldeira","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancias da Terra (ICT), Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"},{"name":"Departamento de F\u00edsica, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"},{"name":"Earth and Remote Sensing Laboratory (EARSLab), University of \u00c9vora, 7004-516 \u00c9vora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4908-0422","authenticated-orcid":false,"given":"Mourad","family":"Bezzeghoud","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancias da Terra (ICT), Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"},{"name":"Departamento de F\u00edsica, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, Apartado 94, 7002-554 \u00c9vora, Portugal"},{"name":"Earth and Remote Sensing Laboratory (EARSLab), University of \u00c9vora, 7004-516 \u00c9vora, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,9,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1016\/S0040-1951(00)00291-2","article-title":"Seismotectonics of Portugal and its adjacent Atlantic area","volume":"331","author":"Borges","year":"2001","journal-title":"Tectonophysics"},{"key":"ref_2","unstructured":"Bezzeghoud, M., Borges, J.F., and Caldeira, B. (2013). Geologia de Portugal, Volume II\u2014Geologia Meso-Cenoz\u00f3ica de Portugal, Escolar Editora."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"359","DOI":"10.1785\/BSSA0890020359","article-title":"Source parameters of the 1992 Melilla (Spain, MW = 4.8), 1994 Alhoceima (Morocco, MW = 5.8), and 1994 Mascara (Algeria, MW = 5.7) earthquakes and seismotectonic implications","volume":"89","author":"Bezzeghoud","year":"1999","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"570","DOI":"10.1038\/35046046","article-title":"Triggering of earthquake aftershocks by dynamic stresses","volume":"408","author":"Kilb","year":"2000","journal-title":"Nature"},{"key":"ref_5","first-page":"301","article-title":"Sismicidad y mecanismo focal de los terremotos de la regi\u00f3n Cabo de San Vicente-Argelia","volume":"20","author":"Buforn","year":"2007","journal-title":"Rev. Soc. Geol\u00f3gica Espa\u00f1a"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"171","DOI":"10.5047\/eps.2011.01.004","article-title":"Rate\/state Coulomb stress transfer model for the CSEP Japan seismicity forecast","volume":"63","author":"Toda","year":"2011","journal-title":"Earth Planets Space"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1665","DOI":"10.1093\/gji\/ggx503","article-title":"Towards routine determination of focal mechanisms obtained from first motion P-wave arrivals","volume":"212","author":"Lentas","year":"2018","journal-title":"Geophys. J. Int."},{"key":"ref_8","unstructured":"Ara\u00fajo, A., Matos, C., and Martins, A. (2010). VIII Congresso Nacional de Geologia, E-Terra."},{"key":"ref_9","unstructured":"Wachilala, P.E. (2015). Sismotect\u00f3nica da Regi\u00e3o de Ciborro-Arraiolos e Sua Rela\u00e7\u00e3o com a Geomorfologia Local. [Master\u2019s Thesis, Universidade de \u00c9vora]. (In Portuguese)."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2885","DOI":"10.1002\/2017JB015114","article-title":"An active seismic zone in intraplate west Iberia inferred from high resolution geophysical data","volume":"123","author":"Matos","year":"2018","journal-title":"J. Geophys. Res."},{"key":"ref_11","unstructured":"Matias, L., Rio, I., Wachilala, P., Vales, D., Borges, J., Dias, N., Carrilho, F., Caldeira, B., Custodio, S., and Fontiela, J. (2019, January 7\u201312). The seismic sequence of Arraiolos, Portugal, in January 2018. Proceedings of the 21st EGU General Assembly, EGU2019, Vienna, Austria."},{"key":"ref_12","unstructured":"Wachilala, P., Borges, J.F., Caldeira, B., Matias, L., Rio, I., and Bezzeghoud, M. (2019, January 8\u201318). Seismotectonic characterization of the region of Arraiolos, South Portugal: Period of January\u2013May, 2018. Proceedings of the 27th IUGG General Assembly, Montr\u00e9al, QC, Canada."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Hamak, I., Wachilala, P., Borges, J., Dias, N., Rio, I., and Bezzeghoud, M. (2021, January 19\u201330). Improved three-dimensional image of the tomographic inversion of the Arraiolos aftershock sequence. Proceedings of the EGU General Assembly 2021, Online.","DOI":"10.5194\/egusphere-egu21-8079"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"104792","DOI":"10.1016\/j.jappgeo.2022.104792","article-title":"Response of water springs towards an earthquake: A case study from Sikkim Himalaya","volume":"206","author":"Barfal","year":"2022","journal-title":"J. Appl. Geophys."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/0031-9201(85)90066-4","article-title":"Global survey of aftershock area expansion patterns","volume":"40","author":"Tajima","year":"1985","journal-title":"Phys. Earth Planet. Inter."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2294","DOI":"10.1029\/2001JB000149","article-title":"Implications of diverse fault orientations imaged in relocated aftershocks of the Mount Lewis, ML5.7, California, earthquake","volume":"107","author":"Kilb","year":"2002","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3413","DOI":"10.1785\/0120090038","article-title":"Fault-Plane Determination of the 18 April 2008 Mount Carmel, Illinois, Earthquake by Detecting and Relocating Aftershocks","volume":"99","author":"Yang","year":"2009","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1146\/annurev.earth.33.092203.122505","article-title":"Earthquake triggering by static, dynamic, and postseismic stress transfer","volume":"33","author":"Freed","year":"2005","journal-title":"Annu. Rev. Earth Planet. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1772","DOI":"10.1093\/gji\/ggu361","article-title":"Spatial-temporal evolution of early aftershocks following the 2010 ML 6.4 Jiashian earthquake in southern Taiwan","volume":"199","author":"Tang","year":"2014","journal-title":"Geophys. J. Int."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"5031","DOI":"10.1002\/2016JB013042","article-title":"A large refined catalog of earthquake relocations and focal mechanisms for the Island of Hawai\u2019i and its seismotectonic implications","volume":"121","author":"Lin","year":"2016","journal-title":"J. Geophys. Res. Solid Earth"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2264","DOI":"10.1785\/0120010200","article-title":"A new method for determining first-motion focal mechanisms","volume":"92","author":"Hardebeck","year":"2002","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1140","DOI":"10.1785\/0120040239","article-title":"Fault Parameter Constraints Using Relocated Earthquakes: Validation of First Motion Focal Mechanism Data","volume":"96","author":"Kilb","year":"2006","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2434","DOI":"10.1785\/0120020236","article-title":"Using S\/P Amplitude Ratios to Constrain the Focal Mechanisms of Small Earthquakes","volume":"93","author":"Hardebeck","year":"2003","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Dallmeyer, R.D., and Mart\u00ednez-Garc\u00eda, E. (1990). Pre-Mesozoic Geology of Iberia, Springer.","DOI":"10.1007\/978-3-642-83980-1"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1046\/j.1365-3121.2001.00327.x","article-title":"The Variscan collage and orogeny (480\u2013290 Ma) and the tectonic definition of the Armorica microplate: A review","volume":"13","author":"Matte","year":"2001","journal-title":"Terra Nova"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"B02103","DOI":"10.1029\/2010JB007538","article-title":"Constraints on the crustal structure of the internal Variscan Belt in SW Europe: A magnetotelluric transect along the eastern part of Central Iberian Zone, Iberian Massif","volume":"116","author":"Pous","year":"2011","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_27","unstructured":"Vera, J.A. (2004). Geolog\u00eda de Espa\u00f1a. Society Geology, IGME."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1167","DOI":"10.1007\/s00531-015-1149-3","article-title":"The multistage crystallization of zircon in calc-alkaline granitoids: U\u2013Pb age constraints on the timing of Variscan tectonic activity in SW Iberia","volume":"104","author":"Pereira","year":"2015","journal-title":"Int. J. Earth Sci."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1062","DOI":"10.1029\/2002TC001479","article-title":"Crustal structure of the transpressional Variscan orogen of SW Iberia: SW Iberia deep seismic reflection profile (IBERSEIS)","volume":"22","author":"Simancas","year":"2003","journal-title":"Tectonics"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"L11601","DOI":"10.1029\/2004GL019684","article-title":"Geophysical evidence of a mantle derived intrusion in SW Iberia","volume":"31","author":"Carbonell","year":"2004","journal-title":"Geophys. Res. Lett."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1016\/j.tecto.2010.07.010","article-title":"Geophysical model of the lithosphere across the Variscan Belt of SW-Iberia: Multidisciplinary assessment","volume":"508","author":"Palomeras","year":"2011","journal-title":"Tectonophysics"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/j.tecto.2012.05.004","article-title":"Petrophysical analysis of a mid-crustal reflector in the IBERSEIS profile, SW Spain","volume":"550\u2013553","author":"Brown","year":"2012","journal-title":"Tectonophysics"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"5585","DOI":"10.1029\/JB094iB05p05585","article-title":"Closure of the Africa-Eurasia-North America Plate motion circuit and tectonics of the Gloria Fault","volume":"94","author":"Argus","year":"1989","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"2191","DOI":"10.1029\/94GL02118","article-title":"Effect of recent revisions to the geo- magnetic reversal time scale on estimates of current plate motions","volume":"21","author":"DeMets","year":"1994","journal-title":"Geophys. Res. Lett."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1111\/j.1365-246X.2009.04491.x","article-title":"Geologically current plate motions","volume":"181","author":"DeMets","year":"2010","journal-title":"Geophys. J. Int."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"220","DOI":"10.1016\/j.tecto.2012.03.037","article-title":"Present-day kinematics of the Mediterranean: A comprehensive overview of GPS results","volume":"579","author":"Nocquet","year":"2012","journal-title":"Tectonophysics"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"344","DOI":"10.1016\/j.tecto.2017.06.001","article-title":"Crustal structure beneath Portugal from teleseismic Rayleigh Wave Ellipticity","volume":"712\u2013713","author":"Attanayake","year":"2017","journal-title":"Tectonophysics"},{"key":"ref_38","first-page":"213","article-title":"Historical seismicity and seismotectonics of the area situated between the Iberian Peninsula, Marrocco, Selvagens and Azores Islands","volume":"Volume 8","author":"Moreira","year":"1991","journal-title":"Seismicity, Seismotectonic and Seismic Risk of the Ibero-Magrebian Region"},{"key":"ref_39","unstructured":"Zbyszewski, G., Barros, A., and Da Veiga Ferreira, O. (1980). Carta Geol\u00f3gica de Portugal na Escala 1\/50 000, folha 36-A (Pavia) e Respectiva Not\u00edcia Explicativa, Direc\u00e7\u00e3o Geral de Geologia e Minas, Servic\u0327os Geol\u00f3gicos de Portugal."},{"key":"ref_40","unstructured":"Moita, P. (2007). Granit\u00f3ides no SW da Zona de Ossa-Morena (Montemor o Novo\u2013\u00c9vora): Petrog\u00e9nese e Processos Geodin\u00e2micos. [Ph.D. Thesis, Universidade de \u00c9vora]."},{"key":"ref_41","unstructured":"Oliveira, J.T., Pereira, E., Ramalho, M., Antunes, M.T., and Monteiro, J.H. (1992). Carta Geol\u00f3gica de Portugal \u00e0 escala 1\/500.000, Servi\u00e7os Geol\u00f3gicos de Portugal. [5th ed.]."},{"key":"ref_42","unstructured":"Feio, M., and Martins, A. (1993). O Relevo do Alto Alentejo, (Trac\u0327os Essenciais), Finisterra."},{"key":"ref_43","unstructured":"Duarte, I.M.R. (2002). Solos Residuais de Rochas Granit\u00f3ides a Sul do Tejo. Caracter\u00edsticas Geol\u00f3gicas e Geot\u00e9cnicas. [Ph.D. Thesis, Universidade de \u00e9vora]. (In Portuguese)."},{"key":"ref_44","unstructured":"Carvalhosa, A.B. (1999). Carta Geol\u00f3gica de Portugal \u00e0 escala de 1\/50,000. Not\u00edcia explicativa da folha 36-C, Arraiolos, Servic\u0327os Geol\u00f3gicos de Portugal."},{"key":"ref_45","unstructured":"Ottem\u00f6ller, L., Voss, P., and Havskov, J. (SEISAN Earthquake Analysis Software for Windows, Solaris, Linux and MacOSX, 2014). SEISAN Earthquake Analysis Software for Windows, Solaris, Linux and MacOSX, Version 10.3."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"771","DOI":"10.1785\/BSSA0760030771","article-title":"HYPOCENTER: An earthquake location method using centered, scaled, and adaptively damped least squares","volume":"76","author":"Lienert","year":"1986","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_47","unstructured":"Lienert, B.R.E. (1991). Report on Modifications made to Hypocenter, Institute of Solid Earth Physics, University of Bergen. Technical report."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1785\/gssrl.66.5.26","article-title":"A Computer Program for Locating Earthquakes Both Locally and Globally","volume":"66","author":"Lienert","year":"1995","journal-title":"Seismol. Res. Lett."},{"key":"ref_49","unstructured":"Kissling, E. (1995). Program VELEST USER\u2019S GUIDE\u2014Short Introduction, Institute of Geophysics, ETH Zurich. Technical report."},{"key":"ref_50","unstructured":"Dias, N.A. (2005). Estudo da Sequ\u00eancia S\u00edsmica Gerada Pelo Sismo do Faial de 9 de Julho de 1998: Anisotropia Crustal, Invers\u00e3o Tomogr\u00e1fica e Caracteriza\u00e7\u00e3o Sismo-Tect\u00f3nica. [Ph.D. Thesis, Universidade de Lisboa]. (In Portuguese)."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"645","DOI":"10.1016\/j.tecto.2017.08.018","article-title":"Crustal seismic structure beneath Portugal and southern Galicia (Western Iberia) and the role of Variscan inheritance","volume":"717","author":"Veludo","year":"2017","journal-title":"Tectonophysics"},{"key":"ref_52","first-page":"615","article-title":"Some discussions on aftershocks, foreshocks and earthquake swarms: The fracture of a semi-infinite body caused by an inner stress origin and its relation to the earthquake phenomena (third paper)","volume":"41","author":"Mogi","year":"1963","journal-title":"Bull. Earthquake Res. Inst."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"1","DOI":"10.4294\/jpe1952.43.1","article-title":"The centenary of the Omori formula for a decay law of after- shock activity","volume":"43","author":"Utsu","year":"1995","journal-title":"J. Phys. Earth."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1785\/BSSA0340040185","article-title":"Frequency of earthquakes in California","volume":"34","author":"Gutenberg","year":"1944","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_55","first-page":"831","article-title":"Magnitude-Frequency Relation for Elastic Shocks Accompanying Fractures of Various Materials and some Related Problems in Earthquakes","volume":"40","author":"Mogi","year":"1962","journal-title":"Bull. Earthq. Res. Inst."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"399","DOI":"10.1785\/BSSA0580010399","article-title":"The Frequency-Magnitude Relation of Microfracturing in Rock and its Relation to Earth- quakes","volume":"58","author":"Scholz","year":"1968","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"4455","DOI":"10.1029\/JB075i023p04455","article-title":"An experimental study of thermally induced microfracturing and its relation to volcanic seismicity","volume":"75","author":"Warren","year":"1970","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_58","first-page":"1","article-title":"Spatiotemporal variations in the b-value of earthquake magnitude\u2013frequency distributions: Classification and causes","volume":"615","author":"Eaton","year":"2014","journal-title":"Tectonophysics"},{"key":"ref_59","unstructured":"Kagan, Y. (1999). Seismicity Patterns, Their Statistical Significance and Physical Meaning, Springer. Pageoph Topical."},{"key":"ref_60","doi-asserted-by":"crossref","unstructured":"Okal, E.A., and Sweet, J.R. (2007). Frequency-Size Distributions for Intraplate Earthquakes, Geological Society of America.","DOI":"10.1130\/2007.2425(05)"},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"L09302","DOI":"10.1029\/2012GL051480","article-title":"Influence of pore-pressure on the event-size distribution of induced earthquakes","volume":"39","author":"Bachmann","year":"2012","journal-title":"Geophys. Res. Lett."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1029\/96GL03779","article-title":"Variations in the frequency-magnitude distribution with depth in two volcanic areas: Mount St. Helens, Washington, and Mt. Spurr, Alaska","volume":"24","author":"Wiemer","year":"1997","journal-title":"Geophys. Res. Lett."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"21843","DOI":"10.1029\/2000JB000008","article-title":"Three dimensional structures of Vp, Vs, and Vp\/Vs beneath the northeastern Japan arc: Implications for arc magmatism and fluids","volume":"106","author":"Nakajima","year":"2011","journal-title":"J. Geophys. Res."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"1557","DOI":"10.1029\/96GL01233","article-title":"Mapping the B-value anomaly at 100 km depth in the Alaska and New Zealand Subduction Zones","volume":"23","author":"Wiemer","year":"1996","journal-title":"Geophys. Res. Lett."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"1819","DOI":"10.1029\/2000GL012558","article-title":"Source and path of magma for volcanoes in the subduction zone of northeastern Japan","volume":"28","author":"Wyss","year":"2001","journal-title":"Geophys. Res. Lett."},{"key":"ref_66","doi-asserted-by":"crossref","unstructured":"Reasenberg, P., and Oppenheimer, D. (1985). FPFIT, FPPLOT, and FPPAGE: FORTRAN Computer Programs for Calculating and Displaying Earthquake Fault-Plane Solutions.","DOI":"10.3133\/ofr85739"},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"17","DOI":"10.1016\/S0031-9201(01)00306-5","article-title":"Determination of focal mechanism solution using initial motion polarity of P and S waves","volume":"130","author":"Nakamura","year":"2002","journal-title":"Phys. Earth Planet. Inter."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"2419","DOI":"10.1785\/0119990156","article-title":"Correlation of microearthquake body-wave spectral amplitudes","volume":"92","author":"Lund","year":"2002","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"999","DOI":"10.1785\/BSSA0700040999","article-title":"Evaluation of S to P amplitude ratios for determining focal mechanisms from regional network observations","volume":"70","author":"Kisslinger","year":"1980","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"972","DOI":"10.1785\/BSSA0860040972","article-title":"Earthquake mechanisms from linear-programming inversion of seismic-wave amplitude ratios","volume":"86","author":"Julian","year":"1996","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"8107","DOI":"10.1029\/93JB00023","article-title":"Determination of source parameters at regional distances with three-component sparse network data","volume":"98","author":"Dreger","year":"1993","journal-title":"J. Geophys. Res."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"1468","DOI":"10.1785\/0120020123","article-title":"Detailed fault structure of the 2000 western Tottori, Japan, earthquake sequence","volume":"93","author":"Fukuyama","year":"2003","journal-title":"Bull. Seismol. Soc. Am."},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1016\/j.tecto.2013.01.030","article-title":"Earthquake focal mechanisms, seismogenic stress, and seismotectonics of the Calabrian Arc, Italy","volume":"602","author":"Presti","year":"2013","journal-title":"Tectonophysics"},{"key":"ref_74","doi-asserted-by":"crossref","first-page":"B1","DOI":"10.1029\/2001JB000685","article-title":"Analysis of similar event clusters in aftershocks of the 1994 Northridge, California, earthquake","volume":"108","author":"Shearer","year":"2003","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_75","unstructured":"Heidbach, O., Rajabi, M., Reiter, K., and Ziegler, M. (2016). World Stress Map 2016, GFZ Data Service."},{"key":"ref_76","first-page":"EGU2014-10887","article-title":"FMC: A one-liner Python program to manage, classify and plot focal mechanisms data","volume":"16","year":"2014","journal-title":"Geophy. Res. Abst."},{"key":"ref_77","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1093\/gji\/ggv285","article-title":"Earthquakes in western Iberia: Improving the understanding of lithospheric deformation in a slowly deforming region","volume":"203","author":"Dias","year":"2015","journal-title":"Geophys. J. 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