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Transcript
00:00Lord please send some help
00:05Itirekomendahan ng Feevox na lagyan ng 5 metrong buffer zone
00:13ang fault na pinagmula ng magnitude 6.9 na lindol sa Cebu
00:17Ibig po sabihin bawal magtayo ng bahay sa ibabaw ng fault line
00:21Saksi, Siniko Wahe
00:23Bago ang magnitude 6.9 na lindol noong September 30
00:30Walang naitalang malaki ang paggalaw ng lupa sa bahagi ng Bogo Bay o sa Northern Cebu mula noong 1600s
00:37Ayon sa Feevox, bago at ngayon lang nila natuklasan ang Bogo Bay fault line na nagdulot ng lindol
00:43Ang dahilan ng biglang paggalaw
00:45The rocks on both sides of the fault are stuck together as a result of friction
00:50So habang nag-add ka ng stress, hindi pa siya totally gumagalaw
00:57So noong hindi niya na ma-overcome yung stress, saka siya gumalaw
01:03And nag-release ka agad siya ng energy instantaneously
01:07Ang dahilan kung bakit hindi ito na-detect agad bilang active fault
01:10For one, a major part of the fault is nasa dagat
01:15Second, wala tayong seismicity ng matagal
01:19Third, it transects limestone areas
01:24And when we say limestone, these are easily dissolved by rain
01:28So madaling ma-dissolve, madaling mawala yung fault markers natin
01:33Strike slip daw ang tawag sa ganitong klase ng paggalaw ng fault line
01:37It's a right lateral strike slip fault
01:40So this one moves towards you, the right part, the right side moves towards you
01:46Malaki raw ang pinsala ng lindol dahil mababaw masyado ang pinagmula nito
01:50Yung magnitude 6.9 event is considered a strong earthquake
01:54Second, yung depth, it's just 5 kilometers
01:58So, yung seismic energy kasi as it travels towards the surface
02:04Nadi-dissipate yan, nagdi-diffuse yung energy
02:06So say for instance, the same magnitude 6.9
02:10But it started at 70 kilometers
02:12Mas malalim
02:14So pagdating yan sa surface, halos wala na siyang ganong lakas
02:18Sa ngayon, ay patuloy pa rin nagmamapa itong Feevox
02:21Para malaman kung gano nga ba kahaba itong bagong Bogo Bay fault na kanilang natagpuan
02:26Sa ngayon, nasa 6 kilometer on land pa lang daw ang kanilang natitrace
02:31Pero ayon sa Feevox, posibleng may haba ito ng nasa 40 hanggang 50 kilometers
02:36Ito naman ang Aftershocks map
02:39Makikita sa pamagitan ng mga pulang bilog
02:41Ang star naman ang epicenter
02:43Yan daw ang tinitrace ngayon ng Feevox
02:45Para ma-map out ang bagong fault line
02:47Ito yung kikita mo naman yung linear feature
02:50May mapi-perceive ka na direction
02:53So this is the epicenter
02:55Pag gano'n, start from sa dagat
02:58And then pupunta rito sa lupa
03:00Yan yung epicenter ng lindol
03:05So as you can see, north is trending
03:09So yun yung tinitingnan natin
03:12Gaya sa iba pang fault sa buong bansa
03:14Nirekomenda ng Feevox na magkaroon ng 5 meter buffer zone sa Bogo Bay fault
03:18Ibig sabihin, bawal magtayo ng struktura
03:21Gaya ng bahay sa ibabaw ng fault line
03:22Ang sinasabi natin, you're not supposed to build a structure on top of fault
03:26Yung structure na habitation
03:30Dapat hindi yan
03:31Kasi nga, wala tayong engineering intervention for ground rupture hazard
03:36Pero hindi raw ibig sabihin na walang panganib sa labas ng 5 meter buffer zone
03:40Nakadepende pa raw sa tibay ng struktura
03:42Kung maliligtas ito sa pagyanig ng lupa
03:44Para sa GMA Integrated News
03:46Ako si Niko Wahe
03:47Ang inyong saksi
03:48Mga kapuso, maging una sa saksi
03:52Mag-subscribe sa GMA Integrated News sa YouTube
03:54Para sa ibat-ibang balita
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