Earthquake with magnitude of Md 3.0 on date 21-03-1993 and time 04:58:58 (UTC) in region 2 km S Pomarance (PI)

A magnitude Md 3.0 earthquake occured in region: 2 km S Pomarance (PI), on

  • 21-03-1993 04:58:58 (UTC)
  • 21-03-1993 05:58:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.28, 10.87 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 2 5897 5897
Castelnuovo di Val di Cecina PI 9 2231 8128
Volterra PI 13 10519 18647
Radicondoli SI 14 914 19561
Monterotondo Marittimo GR 15 1371 20932
Casole d'Elsa SI 15 3897 24829
Montecatini Val di Cecina PI 16 1749 26578
Monteverdi Marittimo PI 17 758 27336
Guardistallo PI 20 1234 28570

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Siena (53903 inhabitants)
55 Km SE of Livorno (159219 inhabitants)
59 Km SW of Scandicci (50609 inhabitants)
61 Km SE of Pisa (89158 inhabitants)
61 Km NW of Grosseto (82087 inhabitants)
62 Km SW of Firenze (382808 inhabitants)
69 Km S of Prato (191150 inhabitants)
69 Km SE of Lucca (89046 inhabitants)
73 Km S of Pistoia (90315 inhabitants)
82 Km SE of Viareggio (62467 inhabitants)
84 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
M 3.2
1993-03-21
04:58:58
43.28 10.87 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 182059
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-03-21 04:58:58 ± 0.197
Latitude 43.28 ± 0.01
Longitude 10.87 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 182059

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) 1944.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00453
Epicentral distance of station farthest from the epicenter (degree) 0.05869
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 9
Type of magnitude Md
Reference to an origin 182059
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:50:51

M:3.2

Field Value
Value 3.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 182059
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:49:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CAF.Z. 1993-03-21T05:00:36.10 10.0 undecidable manual PN 287 0.0587 0.74 0.3
--.SBF.Z. 1993-03-21T05:00:09.00 10.0 undecidable manual SN! 284 0.023 -2.5 0
--.FVI.Z. 1993-03-21T04:59:55.38 10.0 undecidable manual PN 21 0.0321 0.56 0.7
--.MNS.Z. 1993-03-21T04:59:50.00 10.0 undecidable manual SN 123 0.0144 1.17 0.1
--.LRG.Z. 1993-03-21T04:59:50.70 10.0 undecidable manual PN 274 0.0295 -0.1 1
--.LMR.Z. 1993-03-21T04:59:48.40 10.0 undecidable manual PN 272 0.0285 -0.9 0.4
--.FRF.Z. 1993-03-21T04:59:47.60 10.0 undecidable manual PN 276 0.0277 -0.42 0.9
--.PGF.Z. 1993-03-21T04:59:45.90 10.0 undecidable manual SN 242 0.0139 -1.83 0
--.ASS.Z. 1993-03-21T04:59:41.50 10.0 undecidable manual SN 98 0.0118 -0.56 0.4
--.SBF.Z. 1993-03-21T04:59:40.30 10.0 undecidable manual PN 284 0.023 -0.52 0.9
--.CKI.Z. 1993-03-21T04:59:36.24 10.0 undecidable manual PN 301 0.0197 0.46 1
--.ZC9.Z. 1993-03-21T04:59:35.80 10.0 undecidable manual SG 3 0.0096 -1.1 0.2
--.AQU.Z. 1993-03-21T04:59:35.30 10.0 undecidable manual PN 115 0.0186 1.07 0.4
--.SFI.Z. 1993-03-21T04:59:32.41 10.0 undecidable manual SG 48 0.0084 0.42 0.5
--.BOB.Z. 1993-03-21T04:59:31.54 10.0 undecidable manual PN 325 0.0162 1.05 0.4
--.MME.Z. 1993-03-21T04:59:31.62 10.0 undecidable manual SG 352 0.0083 0.34 0.5
--.CRE.Z. 1993-03-21T04:59:28.00 10.0 undecidable manual SG 66 0.0076 -1.15 0.1
--.PGD.Z. 1993-03-21T04:59:28.00 10.0 undecidable manual SG 45 0.0076 -1.2 0.2
--.BDI.Z. 1993-03-21T04:59:27.65 10.0 undecidable manual SG 345 0.0072 0.05 0.6
--.MNS.Z. 1993-03-21T04:59:27.61 10.0 undecidable manual PN 123 0.0144 -0.13 1.5
--.PGF.Z. 1993-03-21T04:59:26.80 10.0 undecidable manual PN 242 0.0139 -0.3 1.4
--.ARV.Z. 1993-03-21T04:59:26.71 10.0 undecidable manual PN 80 0.0137 0.08 1.5
--.RSM.Z. 1993-03-21T04:59:25.40 10.0 undecidable manual PN 59 0.0118 1.26 0.3
--.ASS.Z. 1993-03-21T04:59:23.49 10.0 undecidable manual PN 98 0.0118 -0.34 1.4
--.ZC9.Z. 1993-03-21T04:59:21.80 10.0 undecidable manual PG 3 0.0096 1.37 0.2
--.FIR.Z. 1993-03-21T04:59:19.50 10.0 undecidable manual SG 29 0.005 -0.39 0.8
--.PII.Z. 1993-03-21T04:59:18.47 10.0 undecidable manual SG 329 0.0045 0.46 0.5
--.SFI.Z. 1993-03-21T04:59:17.62 10.0 negative manual PG 48 0.0084 -0.39 2.6
--.MME.Z. 1993-03-21T04:59:16.54 10.0 undecidable manual PG 352 0.0083 -1.06 0.4
--.PGD.Z. 1993-03-21T04:59:16.50 10.0 positive manual PG 45 0.0076 0.1 3.1
--.CRE.Z. 1993-03-21T04:59:16.11 10.0 positive manual PG 66 0.0076 -0.26 2.9
--.BDI.Z. 1993-03-21T04:59:15.55 10.0 negative manual PG 345 0.0072 0.07 3.1
--.FIR.Z. 1993-03-21T04:59:11.00 10.0 positive manual PG 29 0.005 -0.03 3.1
--.PII.Z. 1993-03-21T04:59:10.11 10.0 undecidable manual PG 329 0.0045 0.17 1.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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