Ongoing deep deflation below Vesuvio coupled with Campi Flegrei uplift
| Autor: | Amoruso, A., Acocella, V., Crescentini, L. |
|---|---|
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-1579 |
| Popis: | Adjacent volcanoes may influence each other’s activity; nevertheless, the extent and degree of this interaction, and how this may affect any eruption, remain poorly defined. Although Campi Flegrei and Vesuvio volcanoes are only 25 km apart, on opposite sides of the city of Naples (Italy), any correlation in their activity remained elusive. To get clues of any interaction, we analyze ground displacement at Vesuvio during 1993-2010 and 2015-2022. As for 1993-2010, we use the ERS/ENVISAT ascending- and descending-orbit LOS-displacement time series obtained by CNR-IREA through the SBAS DInSAR technique. As for 2015-2022, we use Level-1 SLC-IW Sentinel-1A imagery and create ascending- and descending-orbit LOS-displacement time series using SBAS within GMTSAR InSAR processing system. SAR time series are in good agreement with leveling and GNSS data. Empirical Orthogonal Functions analysis of ERS/ENVISAT time series evidences an abrupt velocity change in the Vesuvio area around 2002, suggesting onset of deep deflation. The 2015-2022 velocity pattern is very similar to the 2002-2010 one, indicating continued deep deflation. The onset of the Vesuvio subsidence is consistent with deep microseismicity (1 to 8 km depth, clustering at 4 km, likely caused by fluids from an about-8-km deep sill-like magma chamber), which significantly decreased from about 2002. The onset of deflation at Vesuvio coincides with the onset of the ongoing Campi Flegrei uplift, that is driven by deep magma inflation, and suggests magma transfer between the deflated chamber below Vesuvio and the inflated chamber below Campi Flegrei, both at about 8 km depth. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|