Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 27-12-2023 and time 03:13:36 (Italy) in region 1 km E Montieri (GR)

A magnitude ML 1.8 earthquake occured in region: 1 km E Montieri (GR), on

  • 27-12-2023 02:13:36 (UTC)
  • 27-12-2023 03:13:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1300, 11.0270 at 8 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.

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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 6 1903 3107
Monticiano SI 13 1571 4678
Castelnuovo di Val di Cecina PI 13 2231 6909
Monterotondo Marittimo GR 14 1371 8280
Massa Marittima GR 14 8375 16655
Radicondoli SI 15 914 17569
Roccastrada GR 17 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Siena (53903 inhabitants)
42 Km N of Grosseto (82087 inhabitants)
71 Km S of Scandicci (50609 inhabitants)
74 Km S of Firenze (382808 inhabitants)
75 Km SE of Livorno (159219 inhabitants)
79 Km W of Arezzo (99543 inhabitants)
82 Km SE of Pisa (89158 inhabitants)
84 Km S of Prato (191150 inhabitants)
90 Km S of Pistoia (90315 inhabitants)
90 Km SE of Lucca (89046 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
Reviewed
Rev100 		ML 1.8 2023-12-27
02:13:36		 43.1303 11.0272 8 2023-12-27
03:07:24		 Sala Sismica INGV-Roma 124291101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-27 02:13:36 ± 0.09
Latitude 43.1303 ± 0.0045
Longitude 11.0272 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124291101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 522
Semi-minor axis of confidence ellipse (meter) 475
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 52
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.21229
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 28
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 55
Type of magnitude ML
Reference to an origin 124291101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-27 03:07:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.SATI.HHZ. 2023-12-27T02:15:28.31 3.0 undecidable manual Sg 13.94 0
CH.DIX.HHZ. 2023-12-27T02:15:22.28 3.0 undecidable manual Sn -1.05 0
IV.CERA.HNZ. 2023-12-27T02:15:02.99 3.0 undecidable manual Sg 9.32 0
IV.AMUR.HHZ. 2023-12-27T02:14:55.15 3.0 positive manual Pn 7.4 0
IV.NOCI.HHZ. 2023-12-27T02:14:52.29 3.0 undecidable manual Pn -0.44 0
MN.VSL.HHZ. 2023-12-27T02:14:38.47 3.0 positive manual Pn 2.76 0
GU.EQUI.HHZ. 2023-12-27T02:14:15.21 0.3 undecidable manual S 329 134.5653 50 -0.82 48
IV.LMD.HHZ. 2023-12-27T02:14:12.60 1.0 undecidable manual S 27 118.3926 50 0.9 16
IV.SFI.EHZ. 2023-12-27T02:14:09.24 1.0 undecidable manual S 37 108.3138 50 0.24 20
IV.BDI.HHZ. 2023-12-27T02:14:08.34 1.0 undecidable manual S 342 109.113 50 -0.87 16
IV.SMA1.EHZ. 2023-12-27T02:14:07.90 3.0 negative manual Pn 0.6 0
RD.PGF.BHZ. 2023-12-27T02:14:05.12 3.0 positive manual Pn 0.18 0
GU.MAIM.HHZ. 2023-12-27T02:14:04.67 1.0 undecidable manual S 334 96.9252 50 -1.3 14
IV.CRE.HHZ. 2023-12-27T02:14:04.45 0.6 undecidable manual S 54 92.1411 50 -0.24 42
IV.RUFI.EHZ. 2023-12-27T02:14:03.38 1.0 undecidable manual S 26 87.5457 50 -0.09 22
IV.PII.HHZ. 2023-12-27T02:14:00.25 1.0 undecidable manual S 329 77.0673 50 -0.42 21
GU.EQUI.HHZ. 2023-12-27T02:14:00.20 0.3 undecidable manual P 329 134.5653 50 0.69 50
IV.CRMI.HHZ. 2023-12-27T02:13:59.09 0.6 undecidable manual S 357 73.8705 50 -0.73 37
IV.LMD.HHZ. 2023-12-27T02:13:57.44 0.3 undecidable manual P 27 118.3926 50 0.42 57
IV.ATVO.HHZ. 2023-12-27T02:13:56.88 0.3 undecidable manual P 75 114.8961 50 0.41 57
IV.PARC.HHZ. 2023-12-27T02:13:56.75 0.3 undecidable manual P 59 113.2977 50 0.52 56
IV.BDI.HHZ. 2023-12-27T02:13:55.79 0.1 undecidable manual P 342 109.113 50 0.21 81
IV.SFI.EHZ. 2023-12-27T02:13:55.94 0.3 undecidable manual P 37 108.3138 50 0.48 57
GU.CARD.HHZ. 2023-12-27T02:13:55.78 0.1 undecidable manual P 336 108.6135 50 0.28 80
IV.SEI.HHZ. 2023-12-27T02:13:55.75 0.3 undecidable manual P 14 105.9162 50 0.66 54
IV.VMGN.HHZ. 2023-12-27T02:13:54.86 0.1 undecidable manual P 24 100.0221 50 0.67 72
IV.MOCL.EHZ. 2023-12-27T02:13:54.42 0.1 undecidable manual P 7 97.8243 50 0.58 75
IV.CRE.HHZ. 2023-12-27T02:13:53.52 0.3 undecidable manual P 54 92.1411 50 0.55 58
GU.MAIM.HHZ. 2023-12-27T02:13:53.76 0.1 undecidable manual P 334 96.9252 50 0.05 86
IV.LATE.HHZ. 2023-12-27T02:13:52.48 0.3 undecidable manual P 132 85.248 50 0.57 58
IV.RUFI.EHZ. 2023-12-27T02:13:52.47 0.3 undecidable manual P 26 87.5457 50 0.21 63
IV.ARCI.HHZ. 2023-12-27T02:13:51.67 0.6 undecidable manual S 130 47.7189 50 -1.16 32
IV.SACS.HHZ. 2023-12-27T02:13:51.51 0.3 positive manual P 113 78.1662 50 0.7 56
IV.CSNT.HHE. 2023-12-27T02:13:50.53 1.0 undecidable manual S 29 43.5231 50 -1.19 16
IV.PII.HHZ. 2023-12-27T02:13:50.62 0.3 undecidable manual P 329 77.0673 50 -0.03 67
IV.CRMI.HHZ. 2023-12-27T02:13:50.04 0.1 undecidable manual P 357 73.8705 50 -0.12 88
IV.CAFI.HHZ. 2023-12-27T02:13:50.54 0.1 undecidable manual P 73 79.0653 50 -0.41 82
IV.CASP.HHZ. 2023-12-27T02:13:49.76 0.3 undecidable manual S 199 39.9267 50 -0.99 53
TV.SF11.HHZ. 2023-12-27T02:13:48.08 0.1 undecidable manual P 119 60.2952 50 0.01 93
IV.MCIV.CHZ. 2023-12-27T02:13:48.95 0.3 undecidable manual P 126 65.5899 50 0.07 68
IV.LOCA.HNE. 2023-12-27T02:13:45.73 0.3 undecidable manual S 44 27.2505 106 -1.08 52
IV.ARCI.HHZ. 2023-12-27T02:13:45.94 0.1 undecidable manual P 130 47.7189 50 -0.18 92
IV.OSSC.HHZ. 2023-12-27T02:13:45.69 0.1 positive manual P 22 47.0196 50 -0.33 89
IV.CSNT.HHE. 2023-12-27T02:13:45.07 0.1 undecidable manual P 29 43.5231 50 -0.41 88
IV.CASP.HHZ. 2023-12-27T02:13:44.68 0.1 positive manual P 199 39.9267 50 -0.24 92
IV.RIBO.EHZ.01 2023-12-27T02:13:44.38 0.3 undecidable manual S 176 20.1687 112 -0.11 73
IV.FROS.CHZ. 2023-12-27T02:13:42.21 0.1 undecidable manual S 50 13.6752 120 -0.24 96
IV.LOCA.HNE. 2023-12-27T02:13:42.36 0.1 undecidable manual P 44 27.2505 106 -0.29 93
IV.TRIF.CHZ. 2023-12-27T02:13:41.32 0.1 undecidable manual S 260 10.1787 128 -0.14 99
IV.RIBO.EHZ.01 2023-12-27T02:13:41.52 0.1 undecidable manual P 176 20.1687 112 0.21 95
IV.FROS.CHZ. 2023-12-27T02:13:40.17 0.1 positive manual P 50 13.6752 120 0.04 100
IV.TRIF.CHZ. 2023-12-27T02:13:39.84 0.1 undecidable manual P 260 10.1787 128 0.28 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:3.3 0.030771954999999997 0.112 AML other m 2023-12-27T02:13:41.58
IV.TRIF.CHE. ML:2.7 0.006894999999999999 0.1 AML other m 2023-12-27T02:13:41.84
IV.FROS.CHN. ML:2.9 0.0089245205 0.192 AML other m 2023-12-27T02:13:42.34
IV.RIBO.EHN.01 ML:2.6 0.0032199999999999998 0.14 AML other m 2023-12-27T02:13:44.98
IV.FROS.CHE. ML:2.6 0.0043229240000000006 0.248 AML other m 2023-12-27T02:13:44.58
IV.RIBO.EHE.01 ML:2.4 0.0020590285000000002 0.2016 AML other m 2023-12-27T02:13:47.34
IV.CASP.HHE. ML:0.0 0.0008988406499999999 0.16 AML other m 2023-12-27T02:13:50.35
IV.CASP.HNN. ML:0.0 0.001364045 0.12 AML other m 2023-12-27T02:13:50.23
IV.CASP.HHN. ML:0.0 0.0012662909499999999 0.1392 AML other m 2023-12-27T02:13:50.33
IV.CASP.HNE. ML:0.0 0.00107525885 0.1216 AML other m 2023-12-27T02:13:50.18
IV.OSSC.HHE. ML:0.0 0.00023278555 0.1792 AML other m 2023-12-27T02:13:52.35
IV.ARCI.HHE. ML:0.0 0.00038878705000000005 0.1408 AML other m 2023-12-27T02:13:52.09
IV.ARCI.HNE. ML:0.0 0.0003613944 0.1392 AML other m 2023-12-27T02:13:52.10
IV.OSSC.HHN. ML:0.0 0.000189888165 0.2192 AML other m 2023-12-27T02:13:52.38
IV.ARCI.HHN. ML:0.0 0.0007658167 0.2208 AML other m 2023-12-27T02:13:52.68
IV.ARCI.HNN. ML:2.4 0.0007395 0.22 AML other m 2023-12-27T02:13:52.69
TV.SF11.HHN. ML:2.1 0.00026342175 0.28 AML other m 2023-12-27T02:13:57.29
TV.SF11.HHE. ML:2.4 0.0005949999999999999 0.28 AML other m 2023-12-27T02:13:57.40
IV.MCIV.CHN. ML:2.0 0.000203 0.24 AML other m 2023-12-27T02:13:58.48
IV.MCIV.CHE. ML:2.1 0.00021716849999999999 0.24 AML other m 2023-12-27T02:13:59.67
IV.CRMI.HHN. ML:1.6 0.00005645 0.86 AML other m 2023-12-27T02:14:00.02
IV.PII.HHN. ML:2.1 0.000186 0.32 AML other m 2023-12-27T02:14:01.19
IV.PII.HHE. ML:2.1 0.00017649999999999998 0.78 AML other m 2023-12-27T02:14:01.85
IV.CRMI.HHE. ML:1.5 0.000045311985 0.2416 AML other m 2023-12-27T02:14:01.08
IV.CAFI.HHN. ML:1.2 0.00002513634 0.4416 AML other m 2023-12-27T02:14:03.72
IV.CAFI.HHE. ML:1.6 0.00004825 0.62 AML other m 2023-12-27T02:14:02.94
IV.SACS.HHE. ML:1.4 0.00003295 0.48 AML other m 2023-12-27T02:14:04.28
IV.SACS.HHN. ML:1.2 0.00002565 0.78 AML other m 2023-12-27T02:14:04.17
GU.MAIM.HHE. ML:0.0 0.000039330405 0.2608 AML other m 2023-12-27T02:14:04.90
IV.RUFI.EHN. ML:1.7 0.000054841165 0.32 AML other m 2023-12-27T02:14:06.66
IV.RUFI.EHE. ML:1.7 0.000058649999999999996 0.7 AML other m 2023-12-27T02:14:05.86
IV.LATE.HHE. ML:1.7 0.00006844345 1.0592 AML other m 2023-12-27T02:14:24.68
IV.LATE.HHN. ML:2.0 0.00013700000000000002 1.58 AML other m 2023-12-27T02:14:06.99
GU.MAIM.HHN. ML:0.0 0.000044556365000000003 0.2992 AML other m 2023-12-27T02:14:04.93
IV.CRE.HHN. ML:1.6 0.00005102222 0.2608 AML other m 2023-12-27T02:14:06.65
IV.MOCL.EHE. ML:1.6 0.000042498305 0.32 AML other m 2023-12-27T02:13:58.66
IV.CRE.HHE. ML:1.6 0.000049607475 0.64 AML other m 2023-12-27T02:14:09.78
IV.SEI.HHE. ML:2.0 0.00008094999999999999 0.36 AML other m 2023-12-27T02:14:11.43
GU.CARD.HHE. ML:1.7 0.000041852639999999996 0.1408 AML other m 2023-12-27T02:14:12.20
IV.VMGN.HHE. ML:1.6 0.00004165 0.38 AML other m 2023-12-27T02:14:11.57
IV.MOCL.EHN. ML:1.7 0.0000573973 0.36 AML other m 2023-12-27T02:14:09.02
IV.PARC.HHE. ML:0.0 0.000033234855 0.4608 AML other m 2023-12-27T02:14:11.81
IV.VMGN.HHN. ML:1.6 0.00004145 0.44 AML other m 2023-12-27T02:14:12.10
GU.CARD.HHN. ML:1.7 0.000046271025 0.28 AML other m 2023-12-27T02:14:08.79
IV.PARC.HHN. ML:0.0 0.00004459134 0.52 AML other m 2023-12-27T02:14:12.87
IV.BDI.HHN. ML:1.6 0.00003468123 0.48 AML other m 2023-12-27T02:14:16.06
IV.BDI.HHE. ML:1.5 0.00003058091 0.28 AML other m 2023-12-27T02:14:11.75
IV.SEI.HHN. ML:2.2 0.0001555 1.26 AML other m 2023-12-27T02:14:13.88
IV.LMD.HHE. ML:1.7 0.00003465 0.34 AML other m 2023-12-27T02:14:14.54
IV.LMD.HHN. ML:1.6 0.000031090330499999996 0.5216 AML other m 2023-12-27T02:14:21.64
IV.CRMI.HNE. ML:1.9 0.000113572195 0.5392 AML other m 2023-12-27T02:14:02.71
IV.SFI.EHE. ML:1.7 0.000040116635 0.9008 AML other m 2023-12-27T02:14:15.09
IV.SFI.EHN. ML:1.5 0.00003133636 0.44 AML other m 2023-12-27T02:14:19.04
IV.ATVO.HHE. ML:1.5 0.000027449555 0.6192 AML other m 2023-12-27T02:14:17.56
IV.ATVO.HHN. ML:1.4 0.000019155014999999996 1.0592 AML other m 2023-12-27T02:14:28.27
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