Earthquake with magnitude of Md 3.1 on date 29-10-1999 and time 19:50:01 (Italy) in region 5 km W Pomarance (PI)

A magnitude Md 3.1 earthquake occured in region: 5 km W Pomarance (PI), on

  • 29-10-1999 17:50:01 (UTC)
  • 29-10-1999 19:50:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3, 10.81 at 3 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 5 5897 5897
Montecatini Val di Cecina PI 12 1749 7646
Volterra PI 12 10519 18165
Castelnuovo di Val di Cecina PI 13 2231 20396
Guardistallo PI 15 1234 21630
Montescudaio PI 15 2144 23774
Monteverdi Marittimo PI 16 758 24532
Casale Marittimo PI 16 1122 25654
Monterotondo Marittimo GR 17 1371 27025
Bibbona LI 18 3175 30200
Riparbella PI 19 1603 31803
Radicondoli SI 19 914 32717
Casole d'Elsa SI 19 3897 36614

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Siena (53903 inhabitants)
50 Km SE of Livorno (159219 inhabitants)
57 Km SE of Pisa (89158 inhabitants)
59 Km SW of Scandicci (50609 inhabitants)
63 Km SW of Firenze (382808 inhabitants)
65 Km NW of Grosseto (82087 inhabitants)
66 Km SE of Lucca (89046 inhabitants)
69 Km SW of Prato (191150 inhabitants)
71 Km S of Pistoia (90315 inhabitants)
78 Km SE of Viareggio (62467 inhabitants)
89 Km W of Arezzo (99543 inhabitants)
98 Km SE of Massa (69479 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
Bulletin
Rev1000
Md 3.1
ML-VAX 2.5
1999-10-29
17:50:01
43.3 10.81 3 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 376319
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-10-29 17:50:01 ± 0.214
Latitude 43.30 ± 0.01
Longitude 10.81 ± 0.01
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 376319

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) 1669.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 154
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.03222
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 14
Type of magnitude Md
Reference to an origin 376319
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:53:20

ML:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 376319
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
--.PTCC.Z. 1999-10-29T17:50:58.81 10.0 undecidable manual PN 29 0.0322 1.18 0
--.ARV.Z. 1999-10-29T17:50:51.68 10.0 undecidable manual SN 82 0.014 0.96 0.1
--.MNS.Z. 1999-10-29T17:50:51.72 10.0 undecidable manual SN 123 0.0147 -1.03 0
--.ORO.Z. 1999-10-29T17:50:50.99 10.0 undecidable manual PN 320 0.0277 0.32 0.6
--.DOI.Z. 1999-10-29T17:50:47.22 10.0 undecidable manual PN 296 0.0255 -0.1 0.8
--.CTI.Z. 1999-10-29T17:50:47.00 10.0 undecidable manual PN 12 0.0253 0.04 0.8
--.GU9.Z. 1999-10-29T17:50:38.88 10.0 undecidable manual SG 351 0.0096 0.27 0.4
--.ZC9.Z. 1999-10-29T17:50:37.90 10.0 undecidable manual SG 6 0.0095 -0.57 0.2
--.CKI.Z. 1999-10-29T17:50:36.83 10.0 undecidable manual PN 302 0.0193 -0.95 0.1
--.SFI.Z. 1999-10-29T17:50:35.90 10.0 undecidable manual SG 50 0.0087 0.52 0.3
--.BOB.Z. 1999-10-29T17:50:33.17 10.0 undecidable manual PN 326 0.0159 0.57 0.5
--.CRE.Z. 1999-10-29T17:50:32.72 10.0 undecidable manual SG 68 0.0079 -0.18 0.5
--.NRCA.Z. 1999-10-29T17:50:32.40 10.0 undecidable manual PN 104 0.0156 0.11 1.1
--.MNS.Z. 1999-10-29T17:50:31.54 10.0 undecidable manual PN 123 0.0147 0.58 0.5
--.ARV.Z. 1999-10-29T17:50:29.82 10.0 positive manual PN 82 0.014 0.03 2.4
--.BDI.Z. 1999-10-29T17:50:29.70 10.0 undecidable manual SG 348 0.007 -0.41 0.4
--.SNTG.Z. 1999-10-29T17:50:28.82 10.0 undecidable manual PN 91 0.0139 -0.81 0.3
--.FB9.Z. 1999-10-29T17:50:28.89 10.0 undecidable manual PN 73 0.0133 0.24 1.1
--.ASS.Z. 1999-10-29T17:50:26.69 10.0 positive manual PN 99 0.0122 -0.36 1.9
--.ZC9.Z. 1999-10-29T17:50:23.74 10.0 undecidable manual PG 6 0.0095 1.02 0.1
--.GU9.Z. 1999-10-29T17:50:22.60 10.0 positive manual PG 351 0.0096 -0.2 2.4
--.SFI.Z. 1999-10-29T17:50:20.74 10.0 positive manual PG 50 0.0087 -0.19 2.4
--.CRE.Z. 1999-10-29T17:50:19.35 10.0 negative manual PG 68 0.0079 -0.15 2.5
--.PII.Z. 1999-10-29T17:50:19.70 10.0 undecidable manual SG 333 0.0042 -0.3 0.4
--.BDI.Z. 1999-10-29T17:50:17.35 10.0 negative manual PG 348 0.007 -0.17 2.4
--.CSNT.Z. 1999-10-29T17:50:15.30 10.0 undecidable manual SG 63 0.0035 -0.88 0.1
--.PII.Z. 1999-10-29T17:50:11.64 10.0 negative manual PG 333 0.0042 -0.05 2.6
--.CSNT.Z. 1999-10-29T17:50:09.94 10.0 positive manual PG 63 0.0035 0.1 2.6
--.GRFL.Z. 1999-10-29T17:50:08.60 10.0 undecidable manual SG 142 0.0017 -0.61 0.2
--.GRFL.Z. 1999-10-29T17:50:05.85 10.0 negative manual PG 142 0.0017 0.34 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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