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The study was conducted in the Azores region \u2013 Faial, where an HDAS interrogator prototype was connected to dark fiber submarine fiber-optic cable, complemented by the installation of two Ocean Bottom Seismometers (OBS) for calibration and validation of DAS technology. The main objective is to demonstrate that seismic observations obtained by DAS from seafloor cables can provide essential information similar to OBS and particularly in areas where land-based monitoring stations are limited.<\/jats:p>","DOI":"10.1051\/jeos\/2026007","type":"journal-article","created":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T19:46:37Z","timestamp":1769197597000},"page":"11","source":"Crossref","is-referenced-by-count":0,"title":["Comparison of seismic records obtained by distributed acoustic sensing and ocean bottom seismometers"],"prefix":"10.1051","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7680-1056","authenticated-orcid":false,"given":"Orlando","family":"Fraz\u00e3o","sequence":"first","affiliation":[{"name":"INESC TEC \u2013 Institute for Systems and Computer Engineering, Technology and Science","place":["Portugal"]}]},{"given":"Susana","family":"Silva","sequence":"additional","affiliation":[{"name":"INESC TEC \u2013 Institute for Systems and Computer Engineering, Technology and Science","place":["Portugal"]}]},{"given":"Carlos","family":"Corela","sequence":"additional","affiliation":[{"name":"Instituto Dom Luiz, University of Lisbon","place":["Portugal"]}]},{"given":"Afonso","family":"Loureiro","sequence":"additional","affiliation":[{"name":"Instituto Dom Luiz, University of Lisbon","place":["Portugal"]},{"name":"Ag\u00eancia Regional para o Desenvolvimento da Investiga\u00e7\u00e3o, Tecnologia e Inova\u00e7\u00e3o","place":["Portugal"]}]},{"given":"Susana","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Instituto Dom Luiz, University of Lisbon","place":["Portugal"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0384-1924","authenticated-orcid":false,"given":"Paulo","family":"Robalinho","sequence":"additional","affiliation":[{"name":"INESC TEC \u2013 Institute for Systems and Computer Engineering, Technology and Science","place":["Portugal"]}]},{"given":"Ricardo","family":"Sousa","sequence":"additional","affiliation":[{"name":"INESC TEC \u2013 Institute for Systems and Computer Engineering, Technology and Science","place":["Portugal"]}]},{"given":"Hugo F.","family":"Martins","sequence":"additional","affiliation":[{"name":"Instituto de \u00d3ptica \u201cDaza de Vald\u00e9s\u201d IO-CSIC","place":["Spain"]}]},{"given":"Fernando","family":"Carrilho","sequence":"additional","affiliation":[{"name":"Instituto Portugu\u00eas do Mar e da Atmosfera","place":["Portugal"]}]},{"given":"Rachid","family":"Omira","sequence":"additional","affiliation":[{"name":"Instituto Portugu\u00eas do Mar e da Atmosfera","place":["Portugal"]}]},{"given":"Manfred","family":"Niehus","sequence":"additional","affiliation":[{"name":"IT Instituto de Telecomunica\u00e7\u00f5es Lisboa, Campus Alameda, Torre Norte - Piso 10","place":["Portugal"]},{"name":"ISEL Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Em\u00eddio Navarro 1, 1959-007 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8086-4874","authenticated-orcid":false,"given":"Luis","family":"Matias","sequence":"additional","affiliation":[{"name":"Instituto Dom Luiz, University of Lisbon","place":["Portugal"]}]}],"member":"250","published-online":{"date-parts":[[2026,2,23]]},"reference":[{"issue":"6","key":"R1","doi-asserted-by":"publisher","first-page":"2081","DOI":"10.1109\/JLT.2005.849924","volume":"23","author":"Juarez","year":"2005","journal-title":"J. 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