Txoj siv sia muaj nyob ntawm thaj tsam ntawm tectonic daim hlau, qhov twg daim hlau feem ntau ntawm dej hiav txwv crust yog tog (los yog subducting) hauv qab lwm phaj. Av qeeg nyob rau hauv cov subduction zones no yog tshwm sim los ntawm plam ntawm daim hlau thiab rupture nyob rau hauv daim hlau.
Puas muaj av qeeg nyob hauv thaj tsam subduction?
Av qeeg tshwm sim nyob rau lwm qhov ntawm thaj chaw subduction, nyob rau hauv lub phaj subducting ("intra-phaj") uas feem ntau tob tshaj li 30 mais (19 mais) hauv qab ntawm qhov chaw, lossis ntawm qhov "sab sab-nce" tsuas yog ob peb mais hauv qab ntawm qhov chaw uas lub phaj pib nws qhovntsej thiaj tsis mob.
thaj chaw av qeeg tshwm sim nyob qhov twg?
Subduction zones tshwm sim tag nrho nyob ib ncig ntawm ntug dej hiav txwv Pacific, sab ntug dej hiav txwv ntawm Washington, Canada, Alaska, Russia, Nyiv thiab IndonesiaHu ua "Lub Nplhaib ntawm Hluav Taws," cov cheeb tsam subduction no yog lub luag haujlwm rau lub ntiaj teb av qeeg loj tshaj plaws, cov tsunami uas txaus ntshai tshaj plaws thiab qee qhov phem tshaj plaws volcanic eruptions.
Vim li cas thaj tsam subduction muaj av qeeg ntiav thiab tob?
Av qeeg tshwm sim hauv thaj chaw subduction rau ntau yam laj thawj. Kev ntxhov siab cuam tshuam nrog kev sib tsoo ntawm ob daim hlau ua rau deformation ntawm lub phaj overriding, thiab yog li av qeeg ntiav. Cov av qeeg me me kuj tseem tshwm sim ntawm qhov subducting slab thaum qhov chaw xauv (kab txiv kab ntxwv, daim duab 12.20) ruptures.
Ciam teb twg ua rau av qeeg?
Hais txog 80% ntawm av qeeg tshwm sim qhov twg daim hlau raug thawb ua ke, hu ua convergent ciam teb. Lwm daim ntawv ntawm convergent ciam teb yog ib qho kev sib tsoo qhov twg ob lub continental daim hlau sib ntsib head-on.
