Earthquake with magnitude of ML 1.4 on date 07-03-2021 and time 17:52:47 (UTC) in region 1 km NW Montieri (GR)

A magnitude ML 1.4 earthquake occured in region: 1 km NW Montieri (GR), on

  • 07-03-2021 17:52:47 (UTC)
  • 07-03-2021 18:52:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.14, 11.01 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 1 1204 1204
Chiusdino SI 6 1903 3107
Castelnuovo di Val di Cecina PI 12 2231 5338
Monterotondo Marittimo GR 13 1371 6709
Monticiano SI 14 1571 8280
Massa Marittima GR 14 8375 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)
79 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
Md 1.6
ML 1.4
2021-03-07
17:52:47
43.14 11.01 11 2021-03-07
18:04:46
Sala Sismica INGV-Roma 87877821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-07 17:52:47 ± 0.13
Latitude 43.14 ± 0.01
Longitude 11.01 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87877821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 794
Semi-minor axis of confidence ellipse (meter) 774
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 293
Circular confidence region, given by single value of horizontal uncertainty (meter) 790
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 27
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.58186
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.7
Num. used stations 6
Type of magnitude ML
Reference to an origin 87877821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-07 18:04:46

Md:1.6

Field Value
Value 1.6
Uncertainty 0.6
Num. used stations 2
Type of magnitude Md
Reference to an origin 87877821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-07 18:04:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.VLO.HHZ. 2021-03-07T17:54:27.11 3.0 positive manual Pg 7.72 0
SI.BOSI.HHZ. 2021-03-07T17:54:16.52 3.0 undecidable manual Sn -2.47 0
IV.SELL.HHZ. 2021-03-07T17:54:12.20 3.0 positive manual Pg 4.47 0
IV.TREG.HNZ. 2021-03-07T17:54:02.88 3.0 undecidable manual Sg 7.23 0
IV.ORI.HHZ. 2021-03-07T17:54:01.03 3.0 positive manual Pg 5.13 0
IV.VCEL.EHZ. 2021-03-07T17:53:32.80 3.0 undecidable manual S -7.43 0
IV.ZEN8.EHZ. 2021-03-07T17:53:30.47 3.0 undecidable manual Pg 4.21 0
IV.FIR.HHZ. 2021-03-07T17:53:11.08 3.0 undecidable manual S 0.96 0
IV.PE3.EHZ. 2021-03-07T17:53:08.01 3.0 undecidable manual S -6.77 0
TV.SF14.HHN. 2021-03-07T17:53:07.02 0.1 undecidable manual S 131 0.5819 50 -0.73 77
IV.ARCI.HHE. 2021-03-07T17:53:03.23 0.3 undecidable manual S 130 0.4416 50 -0.35 67
IV.CSNT.HHZ. 2021-03-07T17:53:02.00 0.1 undecidable manual S 31 0.3912 50 -0.08 96
IV.CASP.HHZ. 2021-03-07T17:53:01.08 0.1 undecidable manual S 198 0.3633 50 -0.18 95
TV.SF14.HHN. 2021-03-07T17:53:00.02 0.1 undecidable manual P 131 0.5819 50 0.66 80
IV.MAGO.CHE. 2021-03-07T17:52:58.69 0.1 undecidable manual S 298 0.2932 50 -0.5 90
IV.COR1.EHZ. 2021-03-07T17:52:58.33 3.0 undecidable manual P -7.6 0
IV.ARCI.HHE. 2021-03-07T17:52:57.86 0.1 undecidable manual P 130 0.4416 50 0.9 74
IV.CASP.HHZ. 2021-03-07T17:52:56.12 1.0 positive manual P 198 0.3633 50 0.5 22
IV.CSNT.HHZ. 2021-03-07T17:52:56.42 0.6 undecidable manual P 31 0.3912 50 0.33 46
IV.RIBO.EHZ.01 2021-03-07T17:52:55.79 0.3 undecidable manual S 173 0.1898 116 -0.29 72
IV.MAGO.CHE. 2021-03-07T17:52:54.74 0.1 undecidable manual P 298 0.2932 50 0.32 93
IV.FROS.CHZ. 2021-03-07T17:52:53.56 0.1 undecidable manual S 55 0.1259 127 -0.42 94
IV.TRIF.CHZ. 2021-03-07T17:52:52.53 0.1 undecidable manual S 255 0.0845 138 -0.27 98
IV.PE3.EHZ. 2021-03-07T17:52:52.98 3.0 positive manual P -7.94 0
IV.RIBO.EHZ.01 2021-03-07T17:52:52.90 0.3 undecidable manual P 173 0.1898 116 0.27 72
IV.TRIF.CHZ. 2021-03-07T17:52:51.02 0.1 negative manual P 255 0.0845 138 0.28 98
IV.FROS.CHZ. 2021-03-07T17:52:51.56 0.1 negative manual P 55 0.1259 127 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHN. ML:1.3 0.0002015 0.94 AML other m 2021-03-07T17:52:54.77
IV.FROS.CHE. ML:1 0.0001071 0.76 AML other m 2021-03-07T17:52:54.77
IV.CASP.HHE. ML:1.2 5.44E-5 0.16 AML other m 2021-03-07T17:53:01.27
IV.CASP.HHN. ML:1.3 6.94E-5 0.66 AML other m 2021-03-07T17:53:01.18
IV.TREG.HNN. ML:4.2 0.00231 0.66 AML other m 2021-03-07T17:53:38.98
IV.ORI.HHN. ML:3.8 0.000133 0.68 AML other m 2021-03-07T17:54:09.87
IV.ORI.HHE. ML:4 0.000174 0.36 AML other m 2021-03-07T17:54:11.61
IV.TREG.HNE. ML:4.1 0.0021 0.4 AML other m 2021-03-07T17:54:19.64
IV.ARCI.HHE. Md:1.6 13 END duration s
IV.MAGO.CHE. Md:1.7 16 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download