Earthquake with magnitude of Md 3.0 on date 07-02-1997 and time 15:45:34 (UTC) in region 1 km NE Pomarance (PI)

A magnitude Md 3.0 earthquake occured in region: 1 km NE Pomarance (PI), on

  • 07-02-1997 15:45:34 (UTC)
  • 07-02-1997 16:45:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.31, 10.88 at 5 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Pomarance PI 1 5897 5897
Volterra PI 11 10519 16416
Castelnuovo di Val di Cecina PI 11 2231 18647
Casole d'Elsa SI 14 3897 22544
Radicondoli SI 14 914 23458
Montecatini Val di Cecina PI 14 1749 25207
Monterotondo Marittimo GR 18 1371 26578
Monteverdi Marittimo PI 20 758 27336

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Siena (53903 inhabitants)
54 Km SE of Livorno (159219 inhabitants)
56 Km SW of Scandicci (50609 inhabitants)
60 Km SE of Pisa (89158 inhabitants)
60 Km SW of Firenze (382808 inhabitants)
64 Km NW of Grosseto (82087 inhabitants)
66 Km S of Prato (191150 inhabitants)
67 Km SE of Lucca (89046 inhabitants)
70 Km S of Pistoia (90315 inhabitants)
80 Km SE of Viareggio (62467 inhabitants)
83 Km W of Arezzo (99543 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 3.0
ML-VAX 2.2
1997-02-07
15:45:34
43.31 10.88 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 260649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-02-07 15:45:34 ± 0.5
Latitude 43.31 ± 0.03
Longitude 10.88 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 260649

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 4389.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.03189
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 260649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:06:35

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 12
Type of magnitude ML
Reference to an origin 260649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FVI.Z. 1997-02-07T15:46:31.40 10.0 undecidable manual PN 21 0.0319 1.23 0.2
--.VAI.Z. 1997-02-07T15:46:22.50 10.0 undecidable manual PN 330 0.0266 0.32 0.8
--.CKI.Z. 1997-02-07T15:46:12.82 10.0 undecidable manual PN 301 0.0196 1.43 0.2
--.GU9.Z. 1997-02-07T15:46:10.60 10.0 undecidable manual SG 348 0.0096 -1.57 0.1
--.BOB.Z. 1997-02-07T15:46:06.52 10.0 undecidable manual PN 325 0.016 0.55 0.9
--.SFI.Z. 1997-02-07T15:46:05.00 10.0 undecidable manual SG! 49 0.0083 -2 0
--.BDI.Z. 1997-02-07T15:46:04.30 10.0 undecidable manual SG 345 0.007 1.45 0.1
--.ARV.Z. 1997-02-07T15:46:02.40 10.0 undecidable manual PN 82 0.0135 -0.16 1.3
--.MNS.Z. 1997-02-07T15:46:02.00 10.0 undecidable manual PN 124 0.0144 -1.56 0.2
--.FB9.Z. 1997-02-07T15:46:00.79 10.0 undecidable manual PN 74 0.0128 -0.27 1.3
--.RSM.Z. 1997-02-07T15:46:00.30 10.0 undecidable manual PN 61 0.0116 1.06 0.6
--.ASS.Z. 1997-02-07T15:45:59.81 10.0 undecidable manual PN 100 0.0118 0.3 1.3
--.EB9.Z. 1997-02-07T15:45:58.22 10.0 undecidable manual PN 343 0.0104 0.82 0.9
--.ZC9.Z. 1997-02-07T15:45:56.67 10.0 undecidable manual PG 4 0.0094 1 0.7
--.GU9.Z. 1997-02-07T15:45:55.75 10.0 undecidable manual PG 348 0.0096 -0.24 1.4
--.SFI.Z. 1997-02-07T15:45:53.11 10.0 positive manual PG 49 0.0083 -0.21 2.8
--.PII.Z. 1997-02-07T15:45:51.75 10.0 undecidable manual SG 328 0.0044 -1.39 0.1
--.CRE.Z. 1997-02-07T15:45:51.62 10.0 undecidable manual PG 68 0.0074 -0.16 1.4
--.BDI.Z. 1997-02-07T15:45:50.90 10.0 positive manual PG 345 0.007 -0.68 2
--.CSNT.Z. 1997-02-07T15:45:47.93 10.0 undecidable manual SG 61 0.003 0.09 0.6
--.PII.Z. 1997-02-07T15:45:44.36 10.0 negative manual PG 328 0.0044 -0.96 1.4
--.CSNT.Z. 1997-02-07T15:45:42.21 10.0 positive manual PG 61 0.003 -0.05 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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