Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 03-02-2020 and time 17:34:04 (Italy) in region 1 km NW Montieri (GR)

A magnitude ML 1.2 earthquake occured in region: 1 km NW Montieri (GR), on

  • 03-02-2020 16:34:04 (UTC)
  • 03-02-2020 17:34:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1360, 11.0110 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.

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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 1 1204 1204
Chiusdino SI 7 1903 3107
Castelnuovo di Val di Cecina PI 12 2231 5338
Monterotondo Marittimo GR 13 1371 6709
Massa Marittima GR 14 8375 15084
Monticiano SI 14 1571 16655
Radicondoli SI 14 914 17569
Roccastrada GR 19 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Siena (53903 inhabitants)
43 Km N of Grosseto (82087 inhabitants)
71 Km S of Scandicci (50609 inhabitants)
73 Km S of Firenze (382808 inhabitants)
73 Km SE of Livorno (159219 inhabitants)
80 Km W of Arezzo (99543 inhabitants)
81 Km SE of Pisa (89158 inhabitants)
83 Km S of Prato (191150 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
89 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
Bulletin
Rev1000 		ML 1.2 2020-02-03
16:34:04		 43.1363 11.0113 10 2020-07-18
21:08:27		 Bollettino Sismico Italiano INGV 77484051
Reviewed
Rev100 		ML 1.3 2020-02-03
16:34:04		 43.1337 11.0175 10 2020-02-03
16:40:18		 Sala Sismica INGV-Roma 76169361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-03 16:34:04 ± 0.1
Latitude 43.1363 ± 0.0063
Longitude 11.0113 ± 0.0086
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77484051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 748
Semi-minor axis of confidence ellipse (meter) 566
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 301
Circular confidence region, given by single value of horizontal uncertainty (meter) 750.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 77484051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-24 18:57:13

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 76169361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-03 16:40:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.VNF1.HGZ. 2020-02-03T16:35:30.28 3.0 undecidable manual Sg 12.48 0
CR.STON.BHZ. 2020-02-03T16:35:28.98 3.0 undecidable manual Pg 21.379999 0
IV.ZONE.HHZ. 2020-02-03T16:35:20.03 3.0 undecidable manual Sg 6.1 0
IV.CAPR.HNZ. 2020-02-03T16:34:56.82 3.0 undecidable manual Sn -9.99 0
IV.VIVA.HHZ. 2020-02-03T16:34:51.38 3.0 undecidable manual Sn -5.61 0
IV.APEC.HNZ. 2020-02-03T16:34:48.00 3.0 undecidable manual Sg -3.56 0
IV.RM33.EHZ. 2020-02-03T16:34:47.86 3.0 undecidable manual Sn -9.99 0
IV.NARO.HHZ. 2020-02-03T16:34:42.73 3.0 undecidable manual Sn -9.99 0
IV.PE3.EHZ. 2020-02-03T16:34:40.16 3.0 undecidable manual Sn -9.99 0
IV.LPEL.HHZ. 2020-02-03T16:34:37.49 3.0 undecidable manual Pn 2.27 0
IV.MMUR.HNZ. 2020-02-03T16:34:29.97 3.0 undecidable manual Pg 4.69 0
IV.PCN.EHZ. 2020-02-03T16:34:26.46 3.0 positive manual Pg 0.97 0
IV.PE3.EHZ. 2020-02-03T16:34:22.97 3.0 positive manual Pg 0.32 0
IV.ARCI.HHZ. 2020-02-03T16:34:19.74 0.6 undecidable manual S 130 49.1175 50 -0.63 41
IV.CSNT.HHZ. 2020-02-03T16:34:18.61 0.6 undecidable manual S 31 43.623 50 -0.29 46
IV.MNTV.HNZ. 2020-02-03T16:34:18.91 3.0 negative manual Pn -8.61 0
IV.CASP.HHZ. 2020-02-03T16:34:17.66 0.3 undecidable manual S 197 40.1265 50 -0.31 69
IV.MAGO.CHE. 2020-02-03T16:34:15.32 0.6 undecidable manual S 298 32.3454 50 -0.58 43
IV.ARCI.HHZ. 2020-02-03T16:34:14.04 0.1 undecidable manual P 130 49.1175 50 0.33 90
IV.CSNT.HHZ. 2020-02-03T16:34:13.14 0.1 undecidable manual P 31 43.623 50 0.27 92
IV.RIBO.EHZ.01 2020-02-03T16:34:12.40 0.3 undecidable manual S 172 20.9679 116 -0.32 71
IV.CASP.HHZ. 2020-02-03T16:34:12.76 0.1 undecidable manual P 197 40.1265 50 0.44 89
IV.MAGO.CHE. 2020-02-03T16:34:11.17 0.1 undecidable manual P 298 32.3454 50 0.04 99
GU.GSCL.HHZ. 2020-02-03T16:34:10.79 3.0 undecidable manual P -7.93 0
IV.FROS.CHZ. 2020-02-03T16:34:10.37 0.3 undecidable manual S 55 14.2746 126 -0.34 72
IV.RIBO.EHZ.01 2020-02-03T16:34:09.47 0.1 undecidable manual P 172 20.9679 116 0.18 98
IV.TRIF.CHZ. 2020-02-03T16:34:09.17 0.1 undecidable manual S 255 9.0798 138 -0.2 99
IV.FROS.CHZ. 2020-02-03T16:34:08.26 0.1 undecidable manual P 55 14.2746 126 0.12 100
IV.TRIF.CHZ. 2020-02-03T16:34:07.64 0.1 positive manual P 255 9.0798 138 0.28 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.8 0.0008146839 0.6016 AML other m 2020-02-03T16:34:09.55
IV.TRIF.CHN. ML:1.6 0.00059549985 0.768 AML other m 2020-02-03T16:34:09.25
IV.FROS.CHE. ML:1.2 0.00014700000000000002 0.52 AML other m 2020-02-03T16:34:11.56
IV.FROS.CHN. ML:1.2 0.00016049999999999997 1.4 AML other m 2020-02-03T16:34:12.12
IV.RIBO.EHE.01 ML:1.1 0.000084092165 0.96 AML other m 2020-02-03T16:34:12.57
IV.CASP.HHE. ML:1.1 0.00004018317 0.1792 AML other m 2020-02-03T16:34:17.91
IV.CASP.HHN. ML:0.9 0.000031969165 1.152 AML other m 2020-02-03T16:34:18.65
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format not available