Tare da farkawa da dutsen La Palma, ya sake farfado da wani tsohon tsoro, wanda ya raka palmeros shekaru da yawa. Ginin dutsen mai aman wuta na Cumbre Vieja ya tabbata? Shin gefen arewa na tsibirin zai iya ruguje? Masana sun ji tsoron "mummunan rugujewa" na wani bangare na mazugi, wanda bai faru ba. Tsagawar kwanakin ƙarshe na aiki zai iya zama mabuɗin da ya guje wa bala'i.
An yi nazari kan kwanciyar hankali na yammacin tsibirin na shekaru da yawa, tare da kimantawa da suka hada da kiyasin iyawar lalata da wannan zaizayar kasa za ta yi: Babban tsunami wanda zai ratsa Tekun Atlantika. Masana sun share wannan damuwa a cikin al'umma a cikin kwanan nan da masu bincike Mercedes Ferrer, Babban Mai bincike a IGME-CSIC, da Luís González de Vallejo, Farfesa Farfesa a Jami'ar Complutense na Madrid (UCM) da kuma darektan yankin Risks na Volcanic. Cibiyar Volcanological na Canary Islands (Involcán) a cikin babbar mujallar 'Kimiyya', ta tabbatar da cewa ginin Cumbre Vieja yana da kwanciyar hankali a cikin dogon lokaci.
Wannan ginin yana da ƙarfi a mafi yawan ma'aunin ɗan adam, wanda ke nufin cewa zai tsira daga bishiyar dabino a halin yanzu, ba tare da la'akari da yanayin tsaunukan dutsen da ke da alaƙa da fashewar Cumbre Vieja kwanan nan a cikin 2021, wanda ya tayar da wannan barazanar tarihi, in ji su.
Tare da fashewar dutsen mai aman wuta da ba a ƙididdige shi ba a Cumbre Vieja, an dasa yuwuwar rugujewar ɓarna, wani 'rushewa' na ɓangaren mazugi wanda a ƙarshe bai faru akan babban sikeli ba. Fashewar, wacce ta fara a ranar 19 ga Satumba, 2021 kuma ta kare bayan kwanaki 85 da sa'o'i 8, ita ce fashewa mafi girma kuma mafi girma a La Palma. Tare da fiye da mita cubic miliyan 200 na lava da alamar fashewar VEI3, sun kashe ƙararrawa, kamar yadda masana kimiyya suka tuna a cikin mujallar 'Science'.
A ranakun 3, 8 da 23 ga Oktoba, 2021, wani ɓangare na mazugi ya ruguje, ya ƙirƙiri sabbin hanyoyin kwarara da ɓarna da toshe girman gine-gine mai hawa uku waɗanda suka gangaro kan gangara. An diluted ra'ayin rugujewar gabaɗaya a tsibirin.
Kamar yadda aka bayyana a cikin takardar kimiyya, wata muhimmiyar tambaya ta bincike ta kasance dalilin da ya sa wannan fashewar bai haifar da wani mummunan rugujewar gefen dutsen mai aman wuta ba, kamar yadda ake tsammani. Amsar na iya haɗawa, yana da halaye daban-daban na volcanic-tectonic kuma, musamman, yana da "tsarin da ba daidai ba na fasahohin da aka ɓoye a lokacin ƙarshe na fashewa."
Al'umma sun ga irin wadannan tsage-tsafe, saboda sa ido da bayanan da masana kimiyyar kasa da kasa da masu binciken kasa da kuma masu binciken volcano suka yi a kasa kowace rana. Darektan IGN, María José Blanco, kamar abokiyar aikinta Carmen López da Stavros Meletlidis sun karanta a cikin littafinta na Pevolca cewa "za ta iya lura da wani ɓangare na rugujewar mazugi" kuma kafin bayyanar fissures sun yi kira da a kwantar da hankula, suna tsammanin fahimtar hakan. zai kasance zuwa ciki na mazugi, kuma ba wata hanya ba.
An yi rajistar tsagewar da karaya a kwanakin ƙarshe na dutsen mai aman wuta, a farkon watan Disamba. A wancan lokacin, darektan Cibiyar Kula da Geophysical ta Tsakiya na Cibiyar Nazarin Kasa ta Kasa (IGN) ta ba da rahoto game da kwamitin kimiyya na Pevolca (Canary Islands Volcanic Emergency Plan (Pevolca), Carmen López, ya bayyana cewa za su iya canzawa da haifar da zabtarewar ƙasa da rushewa a ciki. Crater Wato, tare da tasiri na gida wanda ba zai lalata kwanciyar hankali na ginin dutsen ba, tun da yake kawai sun bayyana a cikin babban yankin arewa maso gabas na babban ginin.
Mazugi na biyu na dutsen na La Palma yana da karaya da yawa a gininsa a yankin arewa maso gabas. pic.twitter.com/DJL6fUTtZF
- 🏳️🌈Rubén López 🇪🇸 (@rubenlodi) Disamba 6, 2021
Saboda kyakkyawan ƙoƙarin sa ido, wannan fashewar zai ba da damar gwada ra'ayoyin kimiyya iri-iri, daga mahimmancin yuwuwar shekaru 436 na fashewar fashewar na raguwar lokaci zuwa amfani da abubuwan lura na geophysical don fahimtar yadda ake adana magma da ƙaura. haƙoran rigar rigar sama mai tsayi a tsaye da kuma tsarin magmatic crustal. Waɗannan nau'ikan bayanan magmatic da volcanological za su canza kimanta haɗarin fashewar volcano da tsara dogon lokaci.
Ƙungiyoyin Involcán sun tura wani ɓangare na wannan bayanin mai mahimmanci zuwa tsibirin São Jorge a Azores (Portugal), wanda ya yi tafiya zuwa tsibirin don taimakawa wajen sa ido da kuma bibiyar ayyukan a cikin fuskantar yiwuwar fashewar da ke kusa.
