Earthquake with magnitude of Md 3.1 on date 21-05-1998 and time 15:02:29 (UTC) in region 2 km W Castelnuovo di Val di Cecina (PI)

A magnitude Md 3.1 earthquake occured in region: 2 km W Castelnuovo di Val di Cecina (PI), on

  • 21-05-1998 15:02:29 (UTC)
  • 21-05-1998 17:02:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2, 10.89 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
Castelnuovo di Val di Cecina PI 2 2231 2231
Monterotondo Marittimo GR 6 1371 3602
Pomarance PI 11 5897 9499
Montieri GR 13 1204 10703
Monteverdi Marittimo PI 14 758 11461
Radicondoli SI 14 914 12375
Massa Marittima GR 17 8375 20750
Chiusdino SI 17 1903 22653

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Siena (53903 inhabitants)
52 Km NW of Grosseto (82087 inhabitants)
61 Km SE of Livorno (159219 inhabitants)
67 Km SW of Scandicci (50609 inhabitants)
70 Km SE of Pisa (89158 inhabitants)
70 Km SW of Firenze (382808 inhabitants)
78 Km S of Prato (191150 inhabitants)
78 Km SE of Lucca (89046 inhabitants)
82 Km S of Pistoia (90315 inhabitants)
86 Km W of Arezzo (99543 inhabitants)
90 Km SE of Viareggio (62467 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 3.1
ML-VAX 1.9
1998-05-21
15:02:29
43.2 10.89 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 339219
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-05-21 15:02:29 ± 0.341
Latitude 43.20 ± 0.02
Longitude 10.89 ± 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 339219

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) 2979
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.01684
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 339219
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:17:45

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 7
Type of magnitude ML
Reference to an origin 339219
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
--.GU9.Z. 1998-05-21T15:03:10.76 10.0 undecidable manual SN 349 0.0105 1.39 0.2
--.ZC9.Z. 1998-05-21T15:03:08.21 10.0 undecidable manual SN 3 0.0104 -0.76 0.5
--.SFI.Z. 1998-05-21T15:03:05.36 10.0 undecidable manual SG 44 0.0089 1 0.4
--.BOB.Z. 1998-05-21T15:03:03.90 10.0 undecidable manual PN 327 0.0168 0.78 0.9
--.BDI.Z. 1998-05-21T15:03:00.82 10.0 undecidable manual SG 346 0.0079 -0.23 0.7
--.SNTG.Z. 1998-05-21T15:02:57.97 10.0 undecidable manual PN 87 0.0134 0.88 0.9
--.ARV.Z. 1998-05-21T15:02:57.46 10.0 undecidable manual PN 78 0.0137 -0.01 1.5
--.FB9.Z. 1998-05-21T15:02:57.11 10.0 undecidable manual PN 69 0.0131 0.56 1.2
--.MNS.Z. 1998-05-21T15:02:56.26 10.0 undecidable manual PN 121 0.0139 -1.52 0.3
--.EB9.Z. 1998-05-21T15:02:54.98 10.0 undecidable manual PN 344 0.0113 1.06 0.8
--.ASS.Z. 1998-05-21T15:02:54.60 10.0 undecidable manual PN 95 0.0117 -0.26 1.6
--.GU9.Z. 1998-05-21T15:02:53.40 10.0 undecidable manual PN 349 0.0105 0.43 1.5
--.ZC9.Z. 1998-05-21T15:02:53.40 10.0 undecidable manual PN 3 0.0104 1.02 0.9
--.PII.Z. 1998-05-21T15:02:50.74 10.0 undecidable manual SG 333 0.0052 -0.57 0.6
--.SFI.Z. 1998-05-21T15:02:49.10 10.0 undecidable manual PG 44 0.0089 -0.7 1.4
--.BDI.Z. 1998-05-21T15:02:46.53 10.0 undecidable manual PG 346 0.0079 -1.27 0.7
--.CSNT.Z. 1998-05-21T15:02:45.31 10.0 undecidable manual SG 47 0.0036 0.07 0.7
--.PII.Z. 1998-05-21T15:02:40.67 10.0 undecidable manual PG 333 0.0052 -1.51 0.4
--.CSNT.Z. 1998-05-21T15:02:37.96 10.0 positive manual PG 47 0.0036 -0.71 2.7
--.GRFL.Z. 1998-05-21T15:02:33.81 10.0 undecidable manual SG 129 0.0007 0.46 0.7
--.GRFL.Z. 1998-05-21T15:02:30.98 10.0 positive manual PG 129 0.0007 -0.83 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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