Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 17-04-2021 and time 17:45:53 (Italy) in region 6 km N Montieri (GR)

A magnitude ML 2.5 earthquake occured in region: 6 km N Montieri (GR), on

  • 17-04-2021 15:45:53 (UTC)
  • 17-04-2021 17:45:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1840, 11.0160 at 11 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 6 1204 1204
Chiusdino SI 7 1903 3107
Radicondoli SI 9 914 4021
Castelnuovo di Val di Cecina PI 9 2231 6252
Monterotondo Marittimo GR 14 1371 7623
Monticiano SI 14 1571 9194
Pomarance PI 17 5897 15091
Casole d'Elsa SI 18 3897 18988
Massa Marittima GR 18 8375 27363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Siena (53903 inhabitants)
48 Km N of Grosseto (82087 inhabitants)
65 Km S of Scandicci (50609 inhabitants)
68 Km S of Firenze (382808 inhabitants)
70 Km SE of Livorno (159219 inhabitants)
77 Km W of Arezzo (99543 inhabitants)
77 Km SE of Pisa (89158 inhabitants)
78 Km S of Prato (191150 inhabitants)
84 Km S of Pistoia (90315 inhabitants)
84 Km SE of Lucca (89046 inhabitants)
98 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
Bulletin
Rev1000 		ML 2.5 2021-04-17
15:45:53		 43.1845 11.016 11 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89587211
Reviewed
Rev100 		ML 2.5 2021-04-17
15:45:53		 43.1787 11.0073 10 2021-04-17
16:04:11		 Sala Sismica INGV-Roma 89181571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-17 15:45:53 ± 0.12
Latitude 43.1845 ± 0.0045
Longitude 11.0160 ± 0.0074
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89587211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 467
Semi-minor axis of confidence ellipse (meter) 459
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 67
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.20599
Number of stations at which the event was observed 53
Number of stations from which data was used for origin computation 43
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 89587211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-18 14:18:36

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 73
Type of magnitude ML
Reference to an origin 89181571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-17 16:04:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZEN8.EHZ. 2021-04-17T15:47:08.17 3.0 undecidable manual Sg 2.87 0
IV.VBKN.HHZ. 2021-04-17T15:46:58.16 3.0 undecidable manual Pg 10.65 0
MN.VSL.HHZ. 2021-04-17T15:46:55.24 3.0 negative manual Pn 1.55 0
ST.RONC.EHZ. 2021-04-17T15:46:40.50 3.0 negative manual Pn 1.99 0
GU.CANO.HHZ. 2021-04-17T15:46:39.74 3.0 positive manual Pg 8.41 0
IV.LPEL.HHZ. 2021-04-17T15:46:39.23 3.0 undecidable manual Pn 3.69 0
IV.EL6.EHZ. 2021-04-17T15:46:23.12 3.0 negative manual Pn 2.38 0
IV.RONT.HHZ. 2021-04-17T15:46:23.24 0.6 undecidable manual S 20 95.8263 50 1.2 30
FR.SMPL.HHZ.00 2021-04-17T15:46:22.67 3.0 undecidable manual Pn -0.83 0
IV.ASQU.HHZ. 2021-04-17T15:46:21.19 0.6 undecidable manual S 42 92.1411 50 0.14 44
GU.MAIM.HHZ. 2021-04-17T15:46:20.42 0.6 undecidable manual S 333 91.1421 50 -0.38 42
IV.RUFI.EHZ. 2021-04-17T15:46:18.31 0.6 undecidable manual S 29 82.6506 50 -0.22 44
IV.GAVE.EHZ. 2021-04-17T15:46:18.62 3.0 undecidable manual P -1.3 0
IV.TOLF.HHZ. 2021-04-17T15:46:17.78 3.0 positive manual P -0.58 0
IV.CAFI.HHZ. 2021-04-17T15:46:16.09 0.6 undecidable manual S 78 78.4659 50 -1.31 29
IV.PE3.EHZ. 2021-04-17T15:46:16.33 0.3 undecidable manual P 64 132.0678 50 0.6 54
IV.PII.HHZ. 2021-04-17T15:46:15.61 0.6 undecidable manual S 327 71.5728 50 0.05 47
GU.EQUI.HHZ. 2021-04-17T15:46:15.75 0.3 undecidable manual P 328 129.0708 50 0.48 57
IV.PLMA.HHZ. 2021-04-17T15:46:15.78 0.3 undecidable manual P 316 133.866 50 -0.24 60
IV.CPGN.EHZ. 2021-04-17T15:46:15.90 0.3 undecidable manual P 56 125.2746 50 1.21 42
MN.VLC.HHZ. 2021-04-17T15:46:14.15 0.3 undecidable manual P 335 119.3916 50 0.37 60
TV.SF14.HHN. 2021-04-17T15:46:14.60 0.6 undecidable manual S 134 68.0763 50 -0.03 47
IV.ATPI.EHZ. 2021-04-17T15:46:13.31 0.3 undecidable manual P 75 115.6953 50 0.09 64
TV.SF01.EHZ. 2021-04-17T15:46:13.22 0.6 undecidable manual S 133 60.6948 50 0.56 43
IV.LMD.HHZ. 2021-04-17T15:46:13.15 0.3 undecidable manual P 29 113.4975 50 0.27 62
IV.PARC.HHZ. 2021-04-17T15:46:12.58 0.3 undecidable manual P 62 111.0999 50 0.07 65
IV.ARCI.HHZ. 2021-04-17T15:46:11.14 0.6 undecidable manual S 135 52.4031 50 0.68 41
IV.SSP9.EHZ. 2021-04-17T15:46:11.07 0.3 undecidable manual P 64 99.7224 50 0.31 63
IV.SFI.EHZ. 2021-04-17T15:46:11.39 0.1 undecidable manual P 40 104.118 50 -0.04 88
IV.ATVA.EHE. 2021-04-17T15:46:11.02 0.3 undecidable manual P 84 103.119 50 -0.25 63
IV.BADI.EHZ. 2021-04-17T15:46:11.85 0.3 undecidable manual P 70 105.4167 50 0.22 64
GU.CARD.HHE. 2021-04-17T15:46:11.47 0.3 undecidable manual P 336 102.7194 50 0.25 63
Z3.A317A.HHE. 2021-04-17T15:46:11.52 0.6 undecidable manual P 261 96.2259 50 1.31 28
IV.ATMI.HHZ. 2021-04-17T15:46:11.49 0.3 undecidable manual P 80 102.5196 50 0.31 63
GU.POPM.HHZ. 2021-04-17T15:46:10.54 0.1 undecidable manual P 348 97.7244 50 0.1 88
IV.RONT.HHZ. 2021-04-17T15:46:10.85 0.3 undecidable manual P 20 95.8263 50 0.71 56
IV.MGAB.HHZ. 2021-04-17T15:46:10.24 0.3 undecidable manual P 108 93.8394 50 0.39 63
IV.ASQU.HHZ. 2021-04-17T15:46:09.45 0.1 undecidable manual P 42 92.1411 50 -0.13 89
GU.MAIM.HHZ. 2021-04-17T15:46:09.55 0.1 undecidable manual P 333 91.1421 50 0.12 89
IV.CRE.HHZ. 2021-04-17T15:46:09.47 0.3 undecidable manual P 57 89.4438 50 0.29 65
IV.RINC.HHZ. 2021-04-17T15:46:09.58 0.1 undecidable manual P 31 91.242 50 0.14 89
IV.SACS.HHZ. 2021-04-17T15:46:08.21 0.3 undecidable manual P 117 81.4518 50 0.27 66
IV.RUFI.EHZ. 2021-04-17T15:46:07.66 0.1 undecidable manual P 29 82.6506 50 -0.46 84
IV.CAFI.HHZ. 2021-04-17T15:46:07.11 0.1 undecidable manual P 78 78.4659 50 -0.36 87
IV.PII.HHZ. 2021-04-17T15:46:06.70 0.1 undecidable manual P 327 71.5728 50 0.29 89
IV.FIR.HHN. 2021-04-17T15:46:06.15 0.3 undecidable manual P 16 68.1762 50 0.25 68
IV.OSSC.HNE. 2021-04-17T15:46:06.77 0.6 undecidable manual S 26 41.9247 50 -0.89 38
VR.VRG02.HH2. 2021-04-17T15:46:06.11 0.6 undecidable manual P 323 66.0894 50 0.55 42
VR.VRG01.HH2. 2021-04-17T15:46:05.52 0.3 undecidable manual P 320 64.491 50 0.2 69
IV.MCIV.CHZ. 2021-04-17T15:46:05.93 0.3 undecidable manual P 130 69.9744 50 -0.24 68
IV.CSNT.HHZ. 2021-04-17T15:46:05.64 0.6 undecidable manual S 35 38.9277 50 -1.21 33
TV.SF03.EHE. 2021-04-17T15:46:05.90 0.3 undecidable manual P 128 68.8755 50 -0.1 70
TV.SF04.EHZ. 2021-04-17T15:46:05.21 0.1 undecidable manual P 126 65.0904 50 -0.19 92
TV.SF14.HHN. 2021-04-17T15:46:05.83 0.3 undecidable manual P 134 68.0763 50 -0.04 71
TV.SF11.HHN. 2021-04-17T15:46:05.08 0.3 undecidable manual P 123 64.1913 50 -0.19 69
TV.SF13.HHZ. 2021-04-17T15:46:04.92 0.3 undecidable manual P 129 63.5919 50 -0.26 68
TV.SF01.EHZ. 2021-04-17T15:46:04.75 0.1 undecidable manual P 133 60.6948 50 0.02 96
IV.ARCI.HHZ. 2021-04-17T15:46:03.44 0.1 undecidable manual P 135 52.4031 50 -0.02 98
IV.MAGO.CHZ. 2021-04-17T15:46:03.93 0.3 undecidable manual S 289 30.5472 50 -0.7 64
IV.RIBO.EHZ. 2021-04-17T15:46:02.95 0.6 undecidable manual S 175 26.2515 50 -0.52 46
IV.CASP.HHZ. 2021-04-17T15:46:02.75 0.1 undecidable manual P 196 45.3213 50 0.38 92
IV.CSNT.HHZ. 2021-04-17T15:46:00.33 0.1 undecidable manual P 35 38.9277 50 -1.05 72
IV.OSSC.HNE. 2021-04-17T15:46:00.92 0.3 undecidable manual P 26 41.9247 50 -0.92 57
IV.RIBO.EHZ. 2021-04-17T15:45:59.21 0.1 undecidable manual P 175 26.2515 50 -0.22 99
IV.TRIF.CHZ. 2021-04-17T15:45:59.31 0.3 undecidable manual S 230 11.9769 131 -0.14 77
IV.MAGO.CHZ. 2021-04-17T15:45:59.79 0.1 undecidable manual P 289 30.5472 50 -0.3 96
IV.TRIF.CHZ. 2021-04-17T15:45:56.84 0.1 positive manual P 230 11.9769 131 -0.26 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:3.0 0.01115099 0.2176 AML other m 2021-04-17T15:45:59.82
IV.TRIF.CHE. ML:3.0 0.011926179000000002 0.1792 AML other m 2021-04-17T15:45:59.68
IV.RIBO.EHE.01 ML:2.7 0.002973432 0.2432 AML other m 2021-04-17T15:46:02.89
IV.MAGO.CHE. ML:2.3 0.0009285191500000001 0.576 AML other m 2021-04-17T15:46:04.30
IV.CSNT.HHN. ML:2.6 0.0013759074999999997 0.2176 AML other m 2021-04-17T15:46:05.88
IV.CSNT.HHE. ML:2.9 0.0029811424999999997 0.2432 AML other m 2021-04-17T15:46:06.45
IV.CASP.HHE. ML:2.5 0.00092037215 0.3584 AML other m 2021-04-17T15:46:09.54
IV.CASP.HHN. ML:2.7 0.001447552 0.2432 AML other m 2021-04-17T15:46:09.79
IV.ARCI.HNE. ML:2.2 0.0003981749 0.1408 AML other m 2021-04-17T15:46:11.24
IV.ARCI.HHE. ML:2.2 0.00041765220000000003 0.1536 AML other m 2021-04-17T15:46:11.31
IV.ARCI.HNN. ML:2.3 0.0004538078 0.192 AML other m 2021-04-17T15:46:11.36
TV.SF01.EHE. ML:2.6 0.00091810775 0.2432 AML other m 2021-04-17T15:46:14.14
TV.SF01.EHN. ML:2.7 0.0010520991500000002 0.2816 AML other m 2021-04-17T15:46:14.16
TV.SF04.EHE. ML:2.5 0.0006224080999999999 0.3712 AML other m 2021-04-17T15:46:15.37
IV.CAFI.HHN. ML:2.0 0.00015037925 0.4608 AML other m 2021-04-17T15:46:17.58
IV.SACS.HHN. ML:1.8 0.00007885672 0.9216 AML other m 2021-04-17T15:46:18.90
IV.RUFI.EHN. ML:2.5 0.00041143775 0.4224 AML other m 2021-04-17T15:46:19.53
IV.ASQU.HHE. ML:2.3 0.00022605325 1.408 AML other m 2021-04-17T15:46:22.04
IV.CRE.HHE. ML:2.5 0.00033947225000000004 0.6656 AML other m 2021-04-17T15:46:21.56
IV.CRE.HHN. ML:2.5 0.00039222275 0.3584 AML other m 2021-04-17T15:46:22.19
IV.RONT.HHN. ML:3.0 0.0009755706 0.3072 AML other m 2021-04-17T15:46:23.74
IV.RONT.HHE. ML:3.2 0.001775719 0.3584 AML other m 2021-04-17T15:46:24.07
IV.BADI.EHE. ML:2.1 0.00010882765 1.1392 AML other m 2021-04-17T15:46:25.42
IV.SFI.HNE. ML:2.5 0.00032599365 0.9728 AML other m 2021-04-17T15:46:26.38
IV.SFI.EHE. ML:2.4 0.0002364423 0.9728 AML other m 2021-04-17T15:46:26.39
IV.LMD.HHE. ML:2.4 0.00017868295000000002 0.3968 AML other m 2021-04-17T15:46:27.96
IV.LMD.HHN. ML:2.4 0.0002013778 1.3056 AML other m 2021-04-17T15:46:28.66
IV.ATPI.EHE. ML:2.1 0.00010047202499999999 0.7424 AML other m 2021-04-17T15:46:28.79
IV.PLMA.HHN. ML:2.0 0.000054747055 1.216 AML other m 2021-04-17T15:46:34.35
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