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NERIES JRA4 Meeting Rome 4 and 5 December 2006 TASK A: SITE SELECTION Monography of the station CROTONE Station code CRT__ Servizio Sismico Nazionale.

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Presentation on theme: "NERIES JRA4 Meeting Rome 4 and 5 December 2006 TASK A: SITE SELECTION Monography of the station CROTONE Station code CRT__ Servizio Sismico Nazionale."— Presentation transcript:

1 NERIES JRA4 Meeting Rome 4 and 5 December 2006 TASK A: SITE SELECTION Monography of the station CROTONE Station code CRT__ Servizio Sismico Nazionale

2 Location of the site General Site Information Code CRT__ Site Name-Location CROTONE Surface Geology So

3 Geographical Data Latitude Longitude Altitude (m)9 Location of the station

4 Broader areaUr PictureY Free FieldY Type of networkPer Instrument location Orientation [L+] Address Site Description – Housing Table Location of the station

5 Earthquake Recordings Type of InstrumentA Present ConditionRem Date of activation 1975/09/10 Date of deactivation 1981/02/04 Strong Motion RecordsN number of records with PGA<0.1 number of records with PGA>=0.1 maximum recorded PGA (g) Date of Max PGA recorded Source

6 MorfologyPl Basin Geometry Width Depth Length Closest Distance from Edge (Km) Morphological Data View of the area

7 Geological Data Geological mapY Stratigraphy & Lithology Y Bedrock Depth (m)> 100 m Ground water tableY Water table depth< 10 m

8 Geological map LAS AR LAS AR Geological sketch AR = overconsolidated clay LAS = silt – clay - sand

9 Geognostic Investigation In-Situ TestY Survey’s Year2004 Borehole stratigraphyY SPTY SPT-max. depth CPTY CPT-max. depth Survey’s closest distance from station (m) 15 m Raw data availabilityY Type of raw dataD ReferencesProgetto Urban – Dr. G.Naso – Dr. I. Guerra Location surveyings

10 Borehole stratigraphy S40 S48

11 Geotechnical Laboratory Analysis Lab. TestY Survey’s Year2004  Y Resonant Column Test (G-g-D curves) Y Torsional Shear Test Triaxial Cyclic Loading Test Survey’s closest distance from station (m) Raw data availabilityY Type of raw dataD ReferencesProgetto Urban – Dr. G.Naso

12 Geophysical Data In-Situ TestY Survey’s Year2004 P-wave velocityY P-depth30 m P-methodDH S-wave velocityY S-depth30 m S-methodDH QpN Qp-depth Qp-method QsN Qs-depth Qs-method Survey’s closest distance from station (m) Raw data availabilityY Type of raw dataD EC8_CodeC ReferencesProgetto Urban – Dr. G.Naso – Dr. I. Guerra

13 V s Profiles

14 Noise Recordings In-Situ TestY Survey’s Year2004 Single station measurementsY duration of measurements30’ Raw data availabilityY Array measurementsY duration of meas. in central station 30’ Raw data availabilityY ReferencesProgetto Urban – Dr. G.Naso – Dr. I. Guerra

15 DH – Array2D: V s profiles comparison

16 HVSR - S40. Scuola Principe di Piemonte Start recording: 15/07/05 14:19:37End recording: 15/07/05 14:49:37 Trace length: 0:30:00. Analysis performed on the entire trace. Sampling frequency: 128 Hz Window size: 20 s Smoothing window: Triangular window Smoothing: 10% Horizontal to Vertical Spectral Ratio HVSR time stability

17 HVSR – S48. Quartiere Fondo Gesù Start recording: 15/07/05 17:05:54End recording: 15/07/05 17:25:55 GPS location: 017° E, 39° N UTC time: 15:02: Satellite no.: 03 Trace length: 0:20:00. Analysis performed on the entire trace. Sampling frequency: 128 Hz Window size: 20 s Smoothing window: Triangular window Smoothing: 10% Horizontal to Vertical Spectral Ratio HVSR time stability

18 Site Response Site Response AnalysisN Survey’s Year Experimental Studies Earthquake Records Experimental Studies Ambient Noise Records Theoretical Studies 1D Theoretical Studies 2D Theoretical Studies 3D References

19 Contact Information InstituteSSN-DPC PersonFabio Sabetta


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