Earthquake with magnitude of Md 2.5 on date 06-01-1992 and time 02:34:55 (UTC) in region 5 km S Pomarance (PI)

A magnitude Md 2.5 earthquake occured in region: 5 km S Pomarance (PI), on

  • 06-01-1992 02:34:55 (UTC)
  • 06-01-1992 03:34:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.256, 10.862 at 6 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
Castelnuovo di Val di Cecina PI 7 2231 8128
Monterotondo Marittimo GR 12 1371 9499
Radicondoli SI 15 914 10413
Monteverdi Marittimo PI 15 758 11171
Volterra PI 16 10519 21690
Casole d'Elsa SI 18 3897 25587
Montecatini Val di Cecina PI 18 1749 27336
Montieri GR 19 1204 28540
Guardistallo PI 20 1234 29774

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Siena (53903 inhabitants)
56 Km SE of Livorno (159219 inhabitants)
59 Km NW of Grosseto (82087 inhabitants)
62 Km SW of Scandicci (50609 inhabitants)
63 Km SE of Pisa (89158 inhabitants)
65 Km SW of Firenze (382808 inhabitants)
72 Km SE of Lucca (89046 inhabitants)
72 Km S of Prato (191150 inhabitants)
76 Km S of Pistoia (90315 inhabitants)
84 Km SE of Viareggio (62467 inhabitants)
86 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
Bulletin
Rev1000
Md 2.5
ML-VAX 1.9
1992-01-06
02:34:55
43.256 10.862 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 156439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1992-01-06 02:34:55 ± 0.516
Latitude 43.2560 ± 0.0153
Longitude 10.8620 ± 0.0217
Depth (km) 6 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 156439

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) 2446.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 248
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00745
Epicentral distance of station farthest from the epicenter (degree) 0.01376
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 156439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:26:06

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 156439
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
--.ASS.Z. 1992-01-06T02:35:37.50 10.0 undecidable manual SN 97 0.0118 -0.79 0.1
--.SFI.Z. 1992-01-06T02:35:29.31 10.0 undecidable manual SG 47 0.0087 0.34 0.6
--.MME.Z. 1992-01-06T02:35:28.41 10.0 undecidable manual SG 352 0.0084 0.08 0.8
--.PGD.Z. 1992-01-06T02:35:25.98 10.0 undecidable manual SG 44 0.0079 -0.22 0.7
--.BDI.Z. 1992-01-06T02:35:25.12 10.0 undecidable manual SG 346 0.0074 0.51 0.4
--.ARV.Z. 1992-01-06T02:35:23.71 10.0 undecidable manual PN 79 0.0138 0.65 0.4
--.ASS.Z. 1992-01-06T02:35:20.20 10.0 undecidable manual PN 97 0.0118 0.05 1.8
--.SFI.Z. 1992-01-06T02:35:14.36 10.0 undecidable manual PG 47 0.0087 -0.4 1.2
--.MME.Z. 1992-01-06T02:35:14.34 10.0 undecidable manual PG 352 0.0084 -0.06 2
--.PGD.Z. 1992-01-06T02:35:13.24 10.0 undecidable manual PG 44 0.0079 0.07 2
--.BDI.Z. 1992-01-06T02:35:11.76 10.0 undecidable manual PG 346 0.0074 -0.49 1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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