Geophysical constraints on the formation of the volcanic island of Surtsey in 1963-1967 and its internal structure
| Autor: | Sayyadi, Sara |
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| Přispěvatelé: | Magnús Tumi Guðmundsson, Jarðvísindadeild (HÍ), Faculty of Earth Sciences (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), Háskóli Íslands, University of Iceland |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Popis: | The volcanic island of Surtsey, off the south coast of Iceland, was formed by shallow ocean-emergent basaltic volcanism in 1963-1967. There were several episodes of activity, migrating between five vents (Surtur, Surtla, Surtungur, Syrtlingur and Jólnir) to form a discontinuous ~5.8 km-long mostly submarine ridge. Analysis of data from the rudimentary analog seismic network existing in Iceland in the 1960s reveals that the magnitude of completeness for the Surtsey area was ML=2.5. Precursory seismicity (ML Surtsey myndaðist í eldgosi undan suðurströnd Íslands á árunum 1963-1967. Gosvirkni færðist til nokkrum sinnum og alls gaus á fimm stöðum, í Surti, Surtlu, Surtungi, Syrtlingi og Jólni. Myndanirnar eru samtals um 5.8 km á lengd, mynda breiðan en slitróttan hrygg, að stórum hluta neðansjávar. Greining gagna úr því frumstæða skjálftamælakerfi sem til var á Íslandi á þessum tíma sýnir að neðri greiningarmörk jarðskjálfta voru ML=2,5 fyrir Surtsey. Hrina skjálfta This PhD project was mainly funded by the Rannis through the Grant of Excellence Project IceSUSTAIN. Funding started in November 2017. IceSUSTAIN forms a part of the International Continental Drilling Program (ICDP) project SUSTAIN (main partners Univ. Utah, JH-Univ. Iceland, ÍSOR, NI, MATÍS, Univ. Bremen, Univ. Bergen, Univ. Würzburg, Univ. Otago NZ). This PhD project mainly involves UI and Univ. Otago in New Zealand. |
| Databáze: | OpenAIRE |
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