Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 19-09-2021 and time 07:27:15 (Italy) in region 8 km S Montieri (GR)

A magnitude ML 2.0 earthquake occured in region: 8 km S Montieri (GR), on

  • 19-09-2021 05:27:15 (UTC)
  • 19-09-2021 07:27:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0630, 11.0210 at 9 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 8 1204 1204
Massa Marittima GR 11 8375 9579
Chiusdino SI 12 1903 11482
Roccastrada GR 13 9199 20681
Monticiano SI 16 1571 22252
Monterotondo Marittimo GR 16 1371 23623
Gavorrano GR 18 8580 32203
Castelnuovo di Val di Cecina PI 19 2231 34434

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Grosseto (82087 inhabitants)
38 Km SW of Siena (53903 inhabitants)
79 Km S of Scandicci (50609 inhabitants)
79 Km SE of Livorno (159219 inhabitants)
81 Km S of Firenze (382808 inhabitants)
83 Km SW of Arezzo (99543 inhabitants)
88 Km SE of Pisa (89158 inhabitants)
91 Km S of Prato (191150 inhabitants)
97 Km SE of Lucca (89046 inhabitants)
97 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 2.0 2021-09-19
05:27:15		 43.0627 11.0207 9 2022-03-30
13:04:12		 Bollettino Sismico Italiano INGV 96798671
Reviewed
Rev100 		ML 2.0 2021-09-19
05:27:15		 43.0777 11.0002 9 2021-09-19
05:42:56		 Sala Sismica INGV-Roma 95618391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-19 05:27:15 ± 0.12
Latitude 43.0627 ± 0.0054
Longitude 11.0207 ± 0.0086
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96798671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 541
Semi-minor axis of confidence ellipse (meter) 503
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.10072
Epicentral distance of station farthest from the epicenter (degree) 1.56842
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 96798671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-20 11:52:33

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 95618391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-19 05:42:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
RD.PGF.BHZ. 2021-09-19T05:28:04.13 3.0 undecidable manual S 174.0924 -0.97 0
IV.PARC.HHZ. 2021-09-19T05:27:50.65 1.0 undecidable manual S 56 117.7932 50 0.58 18
IV.SFI.EHZ. 2021-09-19T05:27:49.73 1.0 undecidable manual S 35 114.6963 50 0.5 19
IV.SSP9.EHZ. 2021-09-19T05:27:49.19 3.0 undecidable manual S 57 106.116 50 2.25 0
IV.MOCL.EHZ. 2021-09-19T05:27:47.36 1.0 undecidable manual S 7 105.3168 50 0.62 18
IV.ASQU.HHZ. 2021-09-19T05:27:46.67 1.0 undecidable manual S 37 102.3198 50 0.74 18
Z3.A317A.HHZ. 2021-09-19T05:27:45.75 3.0 undecidable manual S 270 95.5377 50 1.63 0
RD.PGF.BHZ. 2021-09-19T05:27:43.26 3.0 undecidable manual Pn 174.0924 -0.99 0
IV.RUFI.EHZ. 2021-09-19T05:27:43.74 0.3 undecidable manual S 24 94.6386 50 -0.13 64
IV.PII.HHZ. 2021-09-19T05:27:41.28 1.0 undecidable manual S 332 83.3499 50 0.41 20
IV.CAFI.HHZ. 2021-09-19T05:27:40.67 1.0 undecidable manual S 69 81.9513 50 0.16 22
IV.CELB.HHN. 2021-09-19T05:27:39.40 1.0 undecidable manual S 242 74.5698 50 0.87 17
IV.CRMI.HNE. 2021-09-19T05:27:39.64 0.6 undecidable manual S 358 81.3519 50 -0.7 37
IV.TOLF.HHZ. 2021-09-19T05:27:38.10 0.3 undecidable manual P 144 136.6632 50 -0.38 55
IV.APEC.HHZ. 2021-09-19T05:27:37.45 0.3 undecidable manual P 64 125.5743 50 0.67 52
IV.PARC.HHZ. 2021-09-19T05:27:36.03 0.1 undecidable manual P 56 117.7932 50 0.46 75
IV.MURB.HHZ. 2021-09-19T05:27:36.88 0.1 undecidable manual P 79 123.6873 50 0.4 75
IV.ATPI.EHZ. 2021-09-19T05:27:36.51 0.1 undecidable manual P 68 119.5914 50 0.66 70
IV.ATVO.HHZ. 2021-09-19T05:27:35.94 0.1 undecidable manual P 72 117.4935 50 0.41 76
IV.SFI.EHZ. 2021-09-19T05:27:35.36 0.1 undecidable manual P 35 114.6963 50 0.27 79
IV.SSP9.EHZ. 2021-09-19T05:27:34.35 0.1 undecidable manual P 57 106.116 50 0.58 74
IV.MOCL.EHZ. 2021-09-19T05:27:34.48 0.1 undecidable manual P 7 105.3168 50 0.83 67
IV.ATMI.HHZ. 2021-09-19T05:27:34.26 0.3 undecidable manual P 73 105.3168 50 0.62 55
TV.SF04.EHZ. 2021-09-19T05:27:34.42 1.0 undecidable manual S 116 57.6978 50 0.39 22
IV.MCIV.CHZ. 2021-09-19T05:27:33.82 0.3 undecidable manual S 120 61.8936 50 -1.32 43
IV.ASQU.HHZ. 2021-09-19T05:27:33.66 0.1 undecidable manual P 37 102.3198 50 0.48 78
TV.SF11.HHZ. 2021-09-19T05:27:33.97 1.0 undecidable manual S 112 57.5979 50 -0.03 23
IV.CRE.HHZ. 2021-09-19T05:27:33.07 0.3 undecidable manual P 50 97.2249 50 0.67 55
TV.SF03.EHN. 2021-09-19T05:27:33.58 0.3 undecidable manual S 118 61.1943 50 -1.38 42
TV.SF14.HHN. 2021-09-19T05:27:33.09 0.3 undecidable manual S 125 59.0964 50 -1.31 44
IV.OSSC.HHE. 2021-09-19T05:27:32.20 0.3 undecidable manual S 19 54.3012 50 -0.91 54
Z3.A317A.HHZ. 2021-09-19T05:27:32.89 0.1 undecidable manual P 270 95.5377 50 0.75 71
IV.RUFI.EHZ. 2021-09-19T05:27:32.37 0.1 undecidable manual P 24 94.6386 50 0.37 81
IV.MGAB.HHZ. 2021-09-19T05:27:31.43 0.1 undecidable manual P 100 90.1431 50 0.12 86
IV.CAFI.HHZ. 2021-09-19T05:27:30.12 0.1 undecidable manual P 69 81.9513 50 0.07 88
IV.CSNT.HHN. 2021-09-19T05:27:30.87 0.3 undecidable manual S 25 50.5161 50 -1.23 46
IV.PII.HHZ. 2021-09-19T05:27:30.17 0.1 undecidable manual P 332 83.3499 50 -0.09 87
IV.CRMI.HNE. 2021-09-19T05:27:30.07 0.1 undecidable manual P 358 81.3519 50 0.11 87
IV.ARCI.HHZ. 2021-09-19T05:27:29.22 0.3 undecidable manual S 122 43.7229 50 -1.07 51
IV.CELB.HHN. 2021-09-19T05:27:29.60 0.1 undecidable manual P 242 74.5698 50 0.69 76
IV.SACS.HHZ. 2021-09-19T05:27:29.55 0.3 undecidable manual P 108 75.9684 50 0.43 62
IV.MAGO.CHE. 2021-09-19T05:27:27.24 0.3 undecidable manual S 309 37.5291 50 -1.4 43
IV.MCIV.CHZ. 2021-09-19T05:27:27.09 0.1 undecidable manual P 120 61.8936 50 0.13 90
TV.SF04.EHZ. 2021-09-19T05:27:26.39 0.1 undecidable manual P 116 57.6978 50 0.08 92
TV.SF03.EHN. 2021-09-19T05:27:26.99 0.1 undecidable manual P 118 61.1943 50 0.14 90
IV.CASP.HHE. 2021-09-19T05:27:26.68 0.3 undecidable manual S 203 32.6451 50 -0.67 62
TV.SF14.HHN. 2021-09-19T05:27:26.68 0.1 undecidable manual P 125 59.0964 50 0.16 90
TV.SF11.HHZ. 2021-09-19T05:27:26.31 0.1 undecidable manual P 112 57.5979 50 0.02 93
IV.OSSC.HHE. 2021-09-19T05:27:25.57 0.1 undecidable manual P 19 54.3012 50 -0.21 90
IV.CSNT.HHN. 2021-09-19T05:27:24.88 0.1 undecidable manual P 25 50.5161 50 -0.31 89
IV.ARCI.HHZ. 2021-09-19T05:27:24.03 0.1 undecidable manual P 122 43.7229 50 -0.12 94
IV.CASP.HHE. 2021-09-19T05:27:22.43 0.1 undecidable manual P 203 32.6451 50 -0.02 97
IV.MAGO.CHE. 2021-09-19T05:27:22.82 0.1 undecidable manual P 309 37.5291 50 -0.38 90
IV.FROS.CHE. 2021-09-19T05:27:22.20 0.3 undecidable manual S 34 19.6692 115 -1.12 52
IV.RIBO.EHZ. 2021-09-19T05:27:21.25 0.6 undecidable manual S 171 12.7761 126 0 51
IV.TRIF.CHZ. 2021-09-19T05:27:20.10 0.3 undecidable manual S 301 11.1777 130 -0.71 63
IV.RIBO.EHZ. 2021-09-19T05:27:19.12 0.1 undecidable manual P 171 12.7761 126 0.19 97
IV.FROS.CHE. 2021-09-19T05:27:19.75 0.1 undecidable manual P 34 19.6692 115 -0.38 92
IV.TRIF.CHZ. 2021-09-19T05:27:18.61 0.1 undecidable manual P 301 11.1777 130 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HHN. ML:1.8 0.00007745 1.1 AML other m 2021-09-19T05:27:33.75
IV.MGAB.HHE. ML:1.8 0.0000672 1.54 AML other m 2021-09-19T05:27:34.08
IV.MCIV.CHE. ML:2.2 0.00034750000000000004 0.22 AML other m 2021-09-19T05:27:34.28
IV.MCIV.CHN. ML:2.2 0.000352 0.16 AML other m 2021-09-19T05:27:36.19
IV.CAFI.HHE. ML:1.8 0.00009445 0.6 AML other m 2021-09-19T05:27:42.63
IV.ATMI.HHE. ML:2.2 0.0001385 0.34 AML other m 2021-09-19T05:27:43.21
IV.SACS.HHE. ML:1.6 0.00005925 0.6 AML other m 2021-09-19T05:27:43.55
IV.MURB.HHE. ML:2.3 0.0001395 0.22 AML other m 2021-09-19T05:27:44.25
IV.RUFI.EHE. ML:2.2 0.0001825 0.24 AML other m 2021-09-19T05:27:44.53
IV.CAFI.HHN. ML:1.8 0.00009039999999999999 0.54 AML other m 2021-09-19T05:27:45.33
IV.TOLF.HHE. ML:1.9 0.00004575 1.08 AML other m 2021-09-19T05:27:45.92
IV.SACS.HHN. ML:1.6 0.000056800000000000005 0.56 AML other m 2021-09-19T05:27:45.49
IV.MURB.HHN. ML:2.3 0.0001395 0.76 AML other m 2021-09-19T05:27:46.45
IV.RUFI.EHN. ML:2.1 0.0001395 0.42 AML other m 2021-09-19T05:27:46.31
IV.ASQU.HHE. ML:1.8 0.00006235 1.6 AML other m 2021-09-19T05:27:48.86
IV.CRE.HHN. ML:2.1 0.000121 0.36 AML other m 2021-09-19T05:27:49.03
IV.CRE.HHE. ML:2.0 0.0001032 0.96 AML other m 2021-09-19T05:27:50.83
IV.ATMI.HHN. ML:2.2 0.000142 0.38 AML other m 2021-09-19T05:27:51.04
IV.ATVO.HHN. ML:1.7 0.00004235 0.4 AML other m 2021-09-19T05:27:51.32
IV.SSP9.EHE. ML:2.0 0.00008060000000000001 0.42 AML other m 2021-09-19T05:27:51.25
IV.ASQU.HHN. ML:1.8 0.00005605 1.28 AML other m 2021-09-19T05:27:51.72
IV.SSP9.EHN. ML:2.3 0.0001785 0.56 AML other m 2021-09-19T05:27:53.64
IV.SFI.EHE. ML:1.8 0.000056099999999999995 1.6 AML other m 2021-09-19T05:27:54.19
IV.ATPI.EHE. ML:1.9 0.000057749999999999994 0.48 AML other m 2021-09-19T05:27:54.36
IV.PARC.HHE. ML:1.9 0.00006685 0.46 AML other m 2021-09-19T05:27:56.42
IV.APEC.HHN. ML:2.1 0.00007905 0.44 AML other m 2021-09-19T05:27:56.83
IV.PARC.HHN. ML:1.9 0.00005925 0.44 AML other m 2021-09-19T05:27:56.63
IV.SFI.EHN. ML:1.8 0.0000471 0.48 AML other m 2021-09-19T05:27:57.44
IV.ATVO.HHE. ML:2.0 0.00007545 0.9 AML other m 2021-09-19T05:27:59.47
IV.ATPI.EHN. ML:1.8 0.0000474 0.42 AML other m 2021-09-19T05:27:59.51
IV.APEC.HHE. ML:2.1 0.00008355 1.44 AML other m 2021-09-19T05:28:00.06
IV.TOLF.HHN. ML:1.8 0.00003585 0.98 AML other m 2021-09-19T05:28:09.50
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 Download