nguJack Lee, i-American Geophysical Union
Uchungechunge lokuzamazama komhlaba nokuzamazama komhlaba kwanyakazisa indawo yase-Ridgecrest e-Southern California ngo-2019. Inzwa ye-acoustic esakazwayo (DAS) kusetshenziswa izintambo ze-fiber-optic inika amandla isithombe esingaphansi kokulungiswa okuphezulu, okungachaza ukukhuliswa kwesayithi okuphawuliwe kokuzamazama komhlaba.
Ukuthi umhlabathi uhamba kangakanani ngesikhathi sokuzamazama komhlaba kuncike kakhulu ematsheni nenhlabathi engaphansi komhlaba. Izifundo zokumodela ziphakamisa ukuthi ukuzamazama komhlaba kukhuliswa ezitsheni ze-sedimentary, okuvame ukutholakala kuzo izindawo zasemadolobheni. Kodwa-ke, ukwakheka kwesithombe esiseduze nendawo ezungeze izindawo zasemadolobheni ngokulungiswa okuphezulu kube yinselele.
Yang et al. basungule indlela entsha yokusebenzisa inzwa ye-acoustic esabalele (i-DAS) ukuze bakhe isithombe sokucaca okuphezulu kwesakhiwo esiseduze nendawo. I-DAS iwuhlelo oluvelayo olungaguqula olukhonaizintambo ze-fiber-opticezindaweni zokuzamazama komhlaba. Ngokugada izinguquko endleleni ama-pulses ahlakazeka ngayo njengoba ehamba ngekhebuli, ososayensi bangakwazi ukubala izinguquko ezincane zezinto ezizungezile ifayibha. Ngokungeziwe ekurekhodweni kokuzamazama komhlaba, i-DAS ibonakale iwusizo ezinhlelweni ezahlukahlukene, njengokuqamba ibhendi enomsindo kunawo wonke e-Rose Parade ka-2020 kanye nokudalula izinguquko ezimangazayo kuthrafikhi yezimoto ngesikhathi sokuhlala ekhaya kwe-COVID-19.
Abacwaningi bangaphambili baphinde basebenzise i-fiber engamakhilomitha angu-10 ukuze bathole ukuzamazama komhlaba okulandela ukuzamazama komhlaba okungu-7.1 Ridgecrest e-California ngoJulayi 2019. Uhlu lwabo lwe-DAS luthole cishe ukuzamazama okungemuva okuphindwe kasithupha njengoba kwenza izinzwa ezivamile phakathi nenkathi eyizinyanga ezi-3.
Ocwaningweni olusha, abacwaningi bahlaziye idatha eqhubekayo yokuzamazama komhlaba ekhiqizwa ithrafikhi. Idatha ye-DAS ivumele ithimba ukuthi lithuthukise imodeli yesivinini sokugunda eshear eseduze nendawo ene-subkilometer enokuhleleka okubili kobukhulu obuphakeme kunamamodeli ajwayelekile. Le modeli yembula ukuthi ngobude bomucu, izindawo lapho ukuzamazama kwangemuva kwakhiqiza khona ukunyakaza okungaphezulu komhlaba ngokuvamile okuhambisana nalapho ijubane lokugunda laliphansi khona.
Imephu enjalo yezinga elihle lengozi yokuzamazama komhlaba ingathuthukisa ukulawulwa kwengozi yokuzamazama komhlaba yasemadolobheni, ikakhulukazi emadolobheni lapho kungenzeka ukuthi amanethiwekhi e-fiber-optic asevele ekhona, ababhali baphakamisa.
Isikhathi sokuthumela: Jun-03-2019