Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 08-02-2023 and time 22:02:04 (Italy) in region 2 km SE Siena (SI)

A magnitude ML 2.1 earthquake occured in region: 2 km SE Siena (SI), on

  • 08-02-2023 21:02:04 (UTC)
  • 08-02-2023 22:02:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3060, 11.3520 at 5 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
Siena SI 2 53903 53903
Monteroni d'Arbia SI 10 9088 62991
Sovicille SI 10 10116 73107
Castelnuovo Berardenga SI 13 9097 82204
Monteriggioni SI 15 9810 92014
Murlo SI 16 2389 94403
Asciano SI 19 7118 101521
Castellina in Chianti SI 19 2859 104380
Gaiole in Chianti SI 19 2758 107138

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km SE of Siena (53903 inhabitants)
47 Km W of Arezzo (99543 inhabitants)
52 Km S of Scandicci (50609 inhabitants)
52 Km S of Firenze (382808 inhabitants)
64 Km NE of Grosseto (82087 inhabitants)
67 Km SE of Prato (191150 inhabitants)
78 Km SE of Pistoia (90315 inhabitants)
87 Km W of Perugia (166134 inhabitants)
89 Km E of Livorno (159219 inhabitants)
89 Km SE of Pisa (89158 inhabitants)
91 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 2.1 2023-02-08
21:02:04		 43.3062 11.3522 5 2023-02-08
21:11:29		 Sala Sismica INGV-Roma 114269781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-08 21:02:04 ± 0.09
Latitude 43.3062 ± 0.0036
Longitude 11.3522 ± 0.0074
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 114269781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 533
Semi-minor axis of confidence ellipse (meter) 390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.94519
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 25
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 114269781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-08 21:11:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.POFI.HHZ. 2023-02-08T21:03:11.10 3.0 undecidable manual Sn -2.54 0
OX.MPRI.HHZ. 2023-02-08T21:02:51.55 3.0 undecidable manual Pn -2.33 0
IV.MC2.EHZ. 2023-02-08T21:02:50.49 3.0 undecidable manual Sn 0.21 0
IV.POFI.HHZ. 2023-02-08T21:02:40.73 3.0 undecidable manual Pn -2.61 0
IV.MSSA.HHZ. 2023-02-08T21:02:33.05 3.0 negative manual Pg -0.02 0
GU.MAIM.HHZ. 2023-02-08T21:02:33.36 1.0 undecidable manual S 315 0.8696 50 -0.6 19
IV.SEI.HHZ. 2023-02-08T21:02:30.69 0.6 undecidable manual S 0 0.7473 50 0.33 43
IV.SFI.EHZ. 2023-02-08T21:02:28.38 1.0 undecidable manual S 31 0.6970 50 -0.48 21
IV.SACS.HHZ. 2023-02-08T21:02:27.14 0.3 undecidable manual S 138 0.6115 50 0.81 57
IV.SSP9.EHZ. 2023-02-08T21:02:27.09 0.3 undecidable manual S 64 0.6259 50 0.35 66
IV.MCIV.CHZ. 2023-02-08T21:02:24.77 0.6 undecidable manual S 156 0.5783 50 -0.56 42
IV.RUFI.EHZ. 2023-02-08T21:02:23.66 0.6 undecidable manual S 12 0.5432 50 -0.65 41
IV.ARCI.HHZ. 2023-02-08T21:02:22.09 0.6 undecidable manual S 169 0.4632 50 0.18 47
IV.ATCC.EHZ. 2023-02-08T21:02:22.91 0.1 undecidable manual P 97 0.9452 50 0.12 86
GU.POPM.HHZ. 2023-02-08T21:02:21.22 0.3 undecidable manual P 330 0.8544 50 -0.01 67
IV.CAFI.HHZ. 2023-02-08T21:02:21.16 0.6 undecidable manual S 87 0.4470 50 -0.3 46
GU.MAIM.HHZ. 2023-02-08T21:02:21.38 0.1 undecidable manual P 315 0.8696 50 -0.1 88
IV.LMD.HHZ. 2023-02-08T21:02:20.55 0.6 negative manual P 18 0.8121 50 0.04 45
IV.ATVO.HHZ. 2023-02-08T21:02:20.17 1.0 negative manual P 84 0.7698 50 0.38 21
IV.SEI.HHZ. 2023-02-08T21:02:20.16 0.1 undecidable manual P 0 0.7473 50 0.75 75
IV.PARC.HHZ. 2023-02-08T21:02:19.22 1.0 negative manual P 62 0.7285 50 0.15 22
IV.PII.HHZ. 2023-02-08T21:02:18.80 0.6 positive manual P 305 0.7293 50 -0.29 43
IV.SFI.EHZ. 2023-02-08T21:02:18.55 1.0 negative manual P 31 0.6970 50 0.01 23
IV.TRIF.CHZ. 2023-02-08T21:02:18.45 0.6 undecidable manual S 240 0.3795 97 -0.7 41
IV.BADI.EHZ. 2023-02-08T21:02:18.76 0.6 positive manual P 72 0.6790 50 0.53 42
IV.SSP9.EHZ. 2023-02-08T21:02:17.49 0.1 undecidable manual P 64 0.6259 50 0.18 91
IV.SACS.HHZ. 2023-02-08T21:02:17.17 1.0 undecidable manual P 138 0.6115 50 0.09 23
IV.MALA0.EHN. 2023-02-08T21:02:16.55 0.6 undecidable manual S 163 0.3130 98 -0.08 50
IV.MALA1.EHN. 2023-02-08T21:02:16.64 0.6 undecidable manual S 163 0.3157 98 -0.08 49
IV.CRMI.HNE. 2023-02-08T21:02:16.19 0.1 undecidable manual P 331 0.5585 50 0.02 95
IV.MALA4.EHN. 2023-02-08T21:02:16.91 0.6 undecidable manual S 163 0.3139 98 0.24 48
IV.CRE.HHZ. 2023-02-08T21:02:16.14 0.6 negative manual P 54 0.5360 50 0.37 45
IV.MALA5.EHZ. 2023-02-08T21:02:16.34 3.0 undecidable manual S 0
IV.MCIV.CHZ. 2023-02-08T21:02:15.65 0.1 undecidable manual P 156 0.5783 50 -0.85 74
IV.RUFI.EHZ. 2023-02-08T21:02:15.61 0.6 negative manual P 12 0.5432 50 -0.3 45
IV.ARCI.HHZ. 2023-02-08T21:02:14.13 0.3 positive manual P 169 0.4632 50 -0.4 67
IV.CAFI.HHZ. 2023-02-08T21:02:13.99 1.0 negative manual P 87 0.4470 50 -0.27 23
IV.OSSC.HHZ. 2023-02-08T21:02:13.42 0.6 undecidable manual S 340 0.2302 101 -0.08 50
IV.TRIF.CHZ. 2023-02-08T21:02:13.40 0.1 undecidable manual P 240 0.3795 97 0.47 90
IV.FROS.CHZ. 2023-02-08T21:02:12.00 0.3 undecidable manual S 236 0.1718 105 0.7 65
IV.MALA4.EHN. 2023-02-08T21:02:11.10 0.1 undecidable manual P 163 0.3139 98 -0.4 93
IV.MALA0.EHN. 2023-02-08T21:02:11.51 0.1 undecidable manual P 163 0.3130 98 0.03 100
IV.CSNT.HHZ. 2023-02-08T21:02:11.19 0.6 undecidable manual S 345 0.1727 105 -0.14 50
IV.MALA1.EHN. 2023-02-08T21:02:11.36 0.1 undecidable manual P 163 0.3157 98 -0.17 97
IV.MALA5.EHZ. 2023-02-08T21:02:10.64 3.0 undecidable manual P 0
IV.OSSC.HHZ. 2023-02-08T21:02:09.23 0.6 negative manual P 340 0.2302 101 -0.44 47
IV.CSNT.HHZ. 2023-02-08T21:02:08.03 1.0 positive manual P 345 0.1727 105 -0.39 24
IV.FROS.CHZ. 2023-02-08T21:02:08.92 0.6 negative manual P 236 0.1718 105 0.52 46
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.4 0.002 0.46 AML other m 2023-02-08T21:02:11.41
IV.CSNT.HHE. ML:2.3 0.001565 0.68 AML other m 2023-02-08T21:02:11.61
IV.FROS.CHN. ML:2.5 0.00249 0.16 AML other m 2023-02-08T21:02:12.48
IV.FROS.CHE. ML:2.4 0.002155 0.14 AML other m 2023-02-08T21:02:12.59
IV.OSSC.HHN. ML:2.1 0.000874 0.72 AML other m 2023-02-08T21:02:13.42
IV.OSSC.HHE. ML:2.4 0.00153 0.7 AML other m 2023-02-08T21:02:13.44
IV.CAFI.HHE. ML:2.0 0.00029749999999999997 0.24 AML other m 2023-02-08T21:02:21.19
IV.CAFI.HHN. ML:2.1 0.000345 0.74 AML other m 2023-02-08T21:02:21.66
IV.ARCI.HNN. ML:2.1 0.00033 0.32 AML other m 2023-02-08T21:02:22.83
IV.ARCI.HHN. ML:2.1 0.00033899999999999995 0.14 AML other m 2023-02-08T21:02:22.98
IV.ARCI.HHE. ML:2.2 0.0004115 1.04 AML other m 2023-02-08T21:02:23.40
IV.ARCI.HNE. ML:2.2 0.00042249999999999997 1.04 AML other m 2023-02-08T21:02:23.93
IV.RUFI.EHE. ML:2.2 0.0003265 0.58 AML other m 2023-02-08T21:02:23.90
IV.RUFI.EHN. ML:2.0 0.0001885 1.52 AML other m 2023-02-08T21:02:23.16
IV.CRE.HHE. ML:2.0 0.00023549999999999998 0.3 AML other m 2023-02-08T21:02:24.58
IV.MCIV.CHN. ML:1.7 0.00009934999999999999 0.3 AML other m 2023-02-08T21:02:27.31
IV.CRE.HHN. ML:2.2 0.00029299999999999997 0.78 AML other m 2023-02-08T21:02:28.30
IV.MCIV.CHE. ML:1.7 0.0000994 1.28 AML other m 2023-02-08T21:02:30.08
IV.SACS.HHN. ML:1.7 0.00008104999999999999 0.42 AML other m 2023-02-08T21:02:30.01
IV.SEI.HHE. ML:2.2 0.00023449999999999998 0.24 AML other m 2023-02-08T21:02:30.75
IV.SFI.EHE. ML:2.0 0.00014000000000000001 1.52 AML other m 2023-02-08T21:02:30.07
IV.SACS.HHE. ML:1.7 0.0000784 0.74 AML other m 2023-02-08T21:02:30.58
IV.BADI.EHE. ML:2.0 0.00016649999999999998 0.32 AML other m 2023-02-08T21:02:31.50
IV.SEI.HHN. ML:2.6 0.000479 1.4 AML other m 2023-02-08T21:02:32.10
IV.BADI.EHN. ML:1.9 0.000132 0.64 AML other m 2023-02-08T21:02:33.47
IV.SFI.EHN. ML:1.9 0.0001041 0.96 AML other m 2023-02-08T21:02:33.88
IV.ATVO.HHE. ML:2.0 0.0001385 0.68 AML other m 2023-02-08T21:02:34.72
IV.LMD.HHN. ML:1.9 0.00009279999999999999 0.4 AML other m 2023-02-08T21:02:35.11
IV.ATVO.HHN. ML:2.0 0.00013915 0.86 AML other m 2023-02-08T21:02:35.37
IV.LMD.HHE. ML:1.9 0.00009429999999999999 1.14 AML other m 2023-02-08T21:02:36.17
IV.ATCC.EHN. ML:2.2 0.00013505 1.46 AML other m 2023-02-08T21:02:39.93
IV.ATCC.EHE. ML:2.3 0.000174 0.52 AML other m 2023-02-08T21:02:43.15
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