Earthquake with magnitude of Md 3.0 on date 30-08-1990 and time 02:35:04 (UTC) in region 2 km W Montieri (GR)

A magnitude Md 3.0 earthquake occured in region: 2 km W Montieri (GR), on

  • 30-08-1990 02:35:04 (UTC)
  • 30-08-1990 04:35:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.14, 10.99 at 10 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
Montieri GR 2 1204 1204
Chiusdino SI 8 1903 3107
Castelnuovo di Val di Cecina PI 10 2231 5338
Monterotondo Marittimo GR 11 1371 6709
Massa Marittima GR 13 8375 15084
Radicondoli SI 14 914 15998
Monticiano SI 15 1571 17569

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Siena (53903 inhabitants)
43 Km N of Grosseto (82087 inhabitants)
70 Km S of Scandicci (50609 inhabitants)
72 Km SE of Livorno (159219 inhabitants)
73 Km SW of Firenze (382808 inhabitants)
80 Km SE of Pisa (89158 inhabitants)
81 Km W of Arezzo (99543 inhabitants)
83 Km S of Prato (191150 inhabitants)
88 Km SE of Lucca (89046 inhabitants)
88 Km S of Pistoia (90315 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 2.7
1990-08-30
02:35:04
43.14 10.99 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 125899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-08-30 02:35:04 ± 0.639
Latitude 43.14 ± 0.01
Longitude 10.99 ± 0.02
Depth (km) 10 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 125899

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) 2418.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00599
Epicentral distance of station farthest from the epicenter (degree) 0.03303
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 125899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:57:08

ML:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 125899
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
--.SBF.Z. 1990-08-30T02:36:18.20 10.0 undecidable manual SN 286 0.024 -0.82 0.2
--.FVI.Z. 1990-08-30T02:36:02.11 10.0 undecidable manual PN 19 0.033 0.71 0.4
--.PGF.Z. 1990-08-30T02:35:56.20 10.0 undecidable manual SN! 248 0.0142 3.36 0
--.SBF.Z. 1990-08-30T02:35:48.00 10.0 undecidable manual PN 286 0.024 0.31 0.8
--.MME.Z. 1990-08-30T02:35:41.40 10.0 undecidable manual SN 348 0.0096 0.17 0.6
--.SFI.Z. 1990-08-30T02:35:38.35 10.0 undecidable manual SG 38 0.0088 0.01 0.6
--.BDI.Z. 1990-08-30T02:35:36.50 10.0 undecidable manual SG 342 0.0087 -1.69 0
--.PGD.Z. 1990-08-30T02:35:35.41 10.0 undecidable manual SG 35 0.0081 -0.41 0.4
--.PGF.Z. 1990-08-30T02:35:33.90 10.0 undecidable manual PN 248 0.0142 1.33 0.2
--.CRE.Z. 1990-08-30T02:35:33.46 10.0 undecidable manual SG 54 0.0075 -0.45 0.4
--.MNS.Z. 1990-08-30T02:35:30.32 10.0 undecidable manual PN 120 0.013 -0.54 0.8
--.RSM.Z. 1990-08-30T02:35:30.65 10.0 undecidable manual PN 52 0.0118 1.62 0.1
--.MAO.Z. 1990-08-30T02:35:29.10 10.0 undecidable manual SG 170 0.0066 -1.33 0
--.PII.Z. 1990-08-30T02:35:27.49 10.0 undecidable manual SG 329 0.006 -0.88 0.3
--.MME.Z. 1990-08-30T02:35:25.87 10.0 undecidable manual PN 348 0.0096 0.21 1.4
--.SFI.Z. 1990-08-30T02:35:24.12 10.0 undecidable manual PG 38 0.0088 -0.08 1.4
--.BDI.Z. 1990-08-30T02:35:23.71 10.0 positive manual PG 342 0.0087 -0.14 2.8
--.PGD.Z. 1990-08-30T02:35:22.79 10.0 positive manual PG 35 0.0081 0.04 2.8
--.CRE.Z. 1990-08-30T02:35:21.82 10.0 positive manual PG 54 0.0075 0.18 2.8
--.MAO.Z. 1990-08-30T02:35:19.49 10.0 positive manual PG 170 0.0066 -0.09 2.7
--.PII.Z. 1990-08-30T02:35:18.44 10.0 undecidable manual PG 329 0.006 0 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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