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| DOI | 10.1038/s41561-022-00930-5 |
| Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption | |
| Flóvenz Ó.G.; Wang R.; Hersir G.P.; Dahm T.; Hainzl S.; Vassileva M. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 397 |
| 结束页码 | 404 |
| 卷号 | 15期号:5 |
| 英文摘要 | Understanding and constraining the source of geodetic deformation in volcanic areas is an important component of hazard assessment. Here, we analyse deformation and seismicity for one year before the March 2021 Fagradalsfjall eruption in Iceland. We generate a high-resolution catalogue of 39,500 earthquakes using optical cable recordings and develop a poroelastic model to describe three pre-eruptional uplift and subsidence cycles at the Svartsengi geothermal field, 8 km west of the eruption site. We find the observed deformation is best explained by cyclic intrusions into a permeable aquifer by a fluid injected at 4 km depth below the geothermal field, with a total volume of 0.11 ± 0.05 km3 and a density of 850 ± 350 kg m–3. We therefore suggest that ingression of magmatic CO2 can explain the geodetic, gravity and seismic data, although some contribution of magma cannot be excluded. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | aquifer; deformation mechanism; geodetic network; magma; seismicity; subsidence; uplift; Iceland |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262207 |
| 作者单位 | ÍSOR, Iceland GeoSurvey, Reykjavik, Iceland |
| 推荐引用方式 GB/T 7714 | Flóvenz Ó.G.； Wang R.； Hersir G.P.； Dahm T.； Hainzl S.； Vassileva M.；. Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption[J],2022,15(5). |
| APA | Flóvenz Ó.G.； Wang R.； Hersir G.P.； Dahm T.； Hainzl S.； Vassileva M.；.(2022).Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption.Nature Geoscience,15(5). |
| MLA | Flóvenz Ó.G.； Wang R.； Hersir G.P.； Dahm T.； Hainzl S.； Vassileva M.；."Cyclical geothermal unrest as a precursor to Iceland’s 2021 Fagradalsfjall eruption".Nature Geoscience 15.5(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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