Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake
The availability of broad-band digital data allow "the analysis" of the seismic signal in the low-noise frequency band for structural and seismic source studies, We model complete seismograms -surface and body waves - for the December 13, 1 990, Eastern Sicily earthquake, recorded at regio...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
1995-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4123 |
| _version_ | 1811197304687820800 |
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| author | N. A. Pino B. Palombo D. Giardini |
| author_facet | N. A. Pino B. Palombo D. Giardini |
| author_sort | N. A. Pino |
| collection | DOAJ |
| description | The availability of broad-band digital data allow "the analysis" of the seismic signal in the low-noise frequency band for structural and seismic source studies, We model complete seismograms -surface and body waves - for the December 13, 1 990, Eastern Sicily earthquake, recorded at regional distances on the MEDNET stations AQU, BNI and KEG, The inversion for the moment tensor is carried out following two approaches: a) a model-independent stralegy to fit complete seismograms in the 100-130 s period range; b) the calibration of phase velocity curves along each path to fit surface waves in the 40-100 s range, Both methodologies yield stable and consistent results: the 1990 Eastern Sicily earthquake had a seismic moment of M/o = 37 x 1024 dyne.cm, corresponding lo magnitude values of mb = 5,5, Ms = 5,7, Mw = ML = 5.8. In a second stage, synthetic seismograms arc generated by full reflectivity in the 5-50 s period range, with a new code based on the "minors" integration. By modelling surface waves in the 30-50 s range and body waves to 5 s periods, we derive average velocity models for the Central and Eastern Mediterranean, and constrain the hypocenter of the 1990 Eastern Sicily earthquake to be in the 13-17 km depth range. |
| first_indexed | 2024-04-12T01:12:58Z |
| format | Article |
| id | doaj.art-15cd9bb00f8a40f1b57f15d77cce6b4e |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-04-12T01:12:58Z |
| publishDate | 1995-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-15cd9bb00f8a40f1b57f15d77cce6b4e2022-12-22T03:54:03ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X1995-06-0138210.4401/ag-4123Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquakeN. A. PinoB. PalomboD. GiardiniThe availability of broad-band digital data allow "the analysis" of the seismic signal in the low-noise frequency band for structural and seismic source studies, We model complete seismograms -surface and body waves - for the December 13, 1 990, Eastern Sicily earthquake, recorded at regional distances on the MEDNET stations AQU, BNI and KEG, The inversion for the moment tensor is carried out following two approaches: a) a model-independent stralegy to fit complete seismograms in the 100-130 s period range; b) the calibration of phase velocity curves along each path to fit surface waves in the 40-100 s range, Both methodologies yield stable and consistent results: the 1990 Eastern Sicily earthquake had a seismic moment of M/o = 37 x 1024 dyne.cm, corresponding lo magnitude values of mb = 5,5, Ms = 5,7, Mw = ML = 5.8. In a second stage, synthetic seismograms arc generated by full reflectivity in the 5-50 s period range, with a new code based on the "minors" integration. By modelling surface waves in the 30-50 s range and body waves to 5 s periods, we derive average velocity models for the Central and Eastern Mediterranean, and constrain the hypocenter of the 1990 Eastern Sicily earthquake to be in the 13-17 km depth range.http://www.annalsofgeophysics.eu/index.php/annals/article/view/4123Seismic momentinversion techniquesvery-broand-band waveformsregional earthquakeEastern Sicily |
| spellingShingle | N. A. Pino B. Palombo D. Giardini Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake Annals of Geophysics Seismic moment inversion techniques very-broand-band waveforms regional earthquake Eastern Sicily |
| title | Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake |
| title_full | Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake |
| title_fullStr | Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake |
| title_full_unstemmed | Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake |
| title_short | Long-period modelling of MEDNET waveforms for the December 13, 1990 Eastern Sicily earthquake |
| title_sort | long period modelling of mednet waveforms for the december 13 1990 eastern sicily earthquake |
| topic | Seismic moment inversion techniques very-broand-band waveforms regional earthquake Eastern Sicily |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4123 |
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