{"refrec":{"BRefID":337994,"RR":"<b>Magalhaes, R.; Fernández-Ruiz, M.R.; Costa, L.; Martins, H.F.; Garcia-Ruiz, A.; Martin-Lopez, S.; Williams, E.; Zhan, Z.; Vantilho, R.; Gonzalez-Herraezi, M.</b> (2020). Underwater seismology using submarine dark fibres, <b><i>in</i></b>: <i>22nd International Conference on Transparent Optical Networks (ICTON).</i> pp. 4. <a href=\"https://hdl.handle.net/10.1109/ICTON51198.2020.9203132\" target=\"_blank\">https://hdl.handle.net/10.1109/ICTON51198.2020.9203132</a>","BEntID":334618,"PublicFlag":1,"CheckedFlag":1,"wosflag":0,"vabbflag":0,"RefStringPartII":", <b><i>in</i></b>: <i>22nd International Conference on Transparent Optical Networks (ICTON).</i> pp. 4. <a href=\"https://hdl.handle.net/10.1109/ICTON51198.2020.9203132\" target=\"_blank\">https://hdl.handle.net/10.1109/ICTON51198.2020.9203132</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Magalhaes, R.; Fernández-Ruiz, M.R.; Costa, L.; Martins, H.F.; Garcia-Ruiz, A.; Martin-Lopez, S.; Williams, E.; Zhan, Z.; Vantilho, R.; Gonzalez-Herraezi, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Magalhaes, R. <i>et al.</i>","Englishabstract":"We review our recent work on chirped-pulse distributed acoustic sensing (DAS) for the characterization of teleseismic and microseismic activity, particularly in submarine environments. We show that this tool may bring orders-of-magnitude more seismic data from the sea bottom, that could lead to a new understanding of the deep Earth's interior. We show the detection of an M8.2 earthquake occurred in the Fiji Islands in August 2018, using an ocean-bottom DAS array located >16000 km away from the earthquake. The acquired signals are compared with the spectrogram of a nearby broadband seismic station, showing major similar features between the two records. 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