The 21 August 2017 Ischia (Italy) Earthquake Source Model Inferred From Seismological, GPS, and DInSAR Measurements

The causative source of the first damaging earthquake instrumentally recorded in the Island of Ischia, occurred on 21 August 2017, has been studied through a multiparametric geophysical approach. In order to investigate the source geometry and kinematics we exploit seismological, Global Positioning...

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Vydáno v:Geophysical research letters Ročník 45; číslo 5; s. 2193 - 2202
Hlavní autoři: De Novellis, V., Carlino, S., Castaldo, R., Tramelli, A., De Luca, C., Pino, N. A., Pepe, S., Convertito, V., Zinno, I., De Martino, P., Bonano, M., Giudicepietro, F., Casu, F., Macedonio, G., Manunta, M., Cardaci, C., Manzo, M., Di Bucci, D., Solaro, G., Zeni, G., Lanari, R., Bianco, F., Tizzani, P.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Washington John Wiley & Sons, Inc 16.03.2018
Témata:
3D source geometry
active normal faults
analytical modeling
Density stratification
DInSAR and GPS data
Earthquake damage
Earthquakes
Geophysics
Global positioning systems
GPS
Interferometric synthetic aperture radar
Interferometry
Ischia 2017 earthquake
Kinematics
Modelling
Positioning systems
Radar
Rheological properties
SAR (radar)
Satellite navigation systems
Seismic activity
Seismic hazard
seismic waveform analysis
Seismological data
Seismology
Solutions
Stratification
Synthetic aperture radar
Tectonic processes
Volcanoes
Ischia
ISSN:0094-8276, 1944-8007
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Shrnutí:The causative source of the first damaging earthquake instrumentally recorded in the Island of Ischia, occurred on 21 August 2017, has been studied through a multiparametric geophysical approach. In order to investigate the source geometry and kinematics we exploit seismological, Global Positioning System, and Sentinel‐1 and COSMO‐SkyMed differential interferometric synthetic aperture radar coseismic measurements. Our results indicate that the retrieved solutions from the geodetic data modeling and the seismological data are plausible; in particular, the best fit solution consists of an E‐W striking, south dipping normal fault, with its center located at a depth of 800 m. Moreover, the retrieved causative fault is consistent with the rheological stratification of the crust in this zone. This study allows us to improve the knowledge of the volcano‐tectonic processes occurring on the Island, which is crucial for a better assessment of the seismic risk in the area. Key Points Investigation of the ground deformation and source geometry of the 2017 Ischia Island earthquake (Italy) is discussed The available seismological, GPS, and DInSAR data permit to investigate the causative fault and define its geometry and kinematics The results suggest that the rheology properties of the crust beneath the Ischia Island have an influence on the volcano‐tectonic processes
Bibliografie:ObjectType-Article-1
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ISSN:0094-8276
1944-8007
DOI:10.1002/2017GL076336