De Siena, Luca; Amoruso, Antonella; Del Pezzo, Edoardo; Castellano, Mario; Wakeford, Zoë; Crescentini, Luca (2017): Earthquake locations and coda-attenuation models at Campi Flegrei caldera (Italy) obtained using seismic data recorded during the 1983-84 volcanic unrest [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.871716, Supplement to: De Siena, Luca; Amoruso, Antonella; Del Pezzo, Edoardo; Wakeford, Zoë; Castellano, Mario; Crescentini, Luca (2017): Space-weighted seismic attenuation mapping of the aseismic source of Campi Flegrei 1983-84 unrest. Geophysical Research Letters, https://doi.org/10.1002/2017GL072507
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Abstract:
Coda wave attenuation imaging is able to detect fluid/melt accumulation and ancient magmatic bodies in volcanoes. Here, we use recently-developed space-weighting sensitivity functions to invert for the spatial distributions of multi-frequency coda-wave attenuation, measured during the largest monitored unrest at Campi Flegrei caldera (1983-84). High-attenuation anomalies are spatially correlated with the regions of highest structural complexities and cross faulting. They characterise deep fluid circulation in and around the aseismic roots of the 1534 AD Mount Nuovo eruption and fluid accumulation in the areas of highest hydrothermal hazard. Just offshore Pozzuoli, and at the highest frequency (wavelengths of ~150 m), the main cause of ground deformation and seismicity during the unrest is an aseismic low-attenuation circular anomaly, similar in shape and nature to those produced by ancient magmatic reservoirs and active sills at other volcanoes.
Coverage:
Latitude: 40.827780 * Longitude: 14.139170
Event(s):
Comment:
1. 1983/1984_loc3D_50_025_05.txt are earthquake location in the typical hypo71 format. These two files refer to two different years (1983/1984). They are obtained using the NonLinLoc software using a search grid algorithm, grid of 50 m node spacing. The output shows date and time origin of the earthquake, location in lat/long (degrees) and depth (km). In the study, the only other output mentioned is the RMS (seconds), the other parameters are in influent for the study.
2. QcH and QcV are inverse coda quality factors modelled using horizontal (H) and vertical (V) seismic components of motion. First two components: WE and SN coordinates (UTM WGS84). The third column is a dummy. Columns 4-9 are the inverse Qc values for frequencies 3-6-9-12-15-18 Hz. Columns 10-11 are the input and output of the checkerboard test. The last column is the sensitivity function for a single source-receiver pair.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | De Siena, Luca | |||
| 2 | File name | File name | De Siena, Luca | |||
| 3 | File format | File format | De Siena, Luca | |||
| 4 | File size | File size | kByte | De Siena, Luca | ||
| 5 | Uniform resource locator/link to file | URL file | De Siena, Luca |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
20 data points