Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 08-02-2023 and time 21:02:04 (UTC) 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) 43.3010, 11.3470 at 8 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 14 9097 82204
Monteriggioni SI 15 9810 92014
Murlo SI 15 2389 94403
Asciano SI 19 7118 101521
Castellina in Chianti SI 20 2859 104380

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km SE of Siena (53903 inhabitants)
47 Km W of Arezzo (99543 inhabitants)
53 Km S of Scandicci (50609 inhabitants)
53 Km S of Firenze (382808 inhabitants)
63 Km NE of Grosseto (82087 inhabitants)
68 Km SE of Prato (191150 inhabitants)
79 Km SE of Pistoia (90315 inhabitants)
87 Km W of Perugia (166134 inhabitants)
88 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
Bulletin
Rev1000 		ML 2.1 2023-02-08
21:02:04		 43.3007 11.3468 8 2024-03-01
17:18:15		 Bollettino Sismico Italiano INGV 120581761
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 ± 0.12
Latitude 43.3007 ± 0.0036
Longitude 11.3468 ± 0.0099
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 120581761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 588
Semi-minor axis of confidence ellipse (meter) 483
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
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 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.16548
Epicentral distance of station farthest from the epicenter (degree) 0.94878
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes 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

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 120581761
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-29 09:40:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2023-02-08T21:02:30.44 0.6 undecidable manual S 1 83.6496 50 0.5 42
IV.SFI.EHZ. 2023-02-08T21:02:28.15 0.6 undecidable manual S 31 78.1662 50 -0.33 44
IV.VMGN.HHN. 2023-02-08T21:02:27.52 0.6 undecidable manual S 12 74.0703 50 0.14 46
IV.MPPT.EHN. 2023-02-08T21:02:27.41 0.6 undecidable manual S 344 75.7686 50 -0.43 43
IV.BOSL.HHE. 2023-02-08T21:02:25.72 0.6 undecidable manual S 2 69.9744 50 -0.57 42
IV.ATCC.EHZ. 2023-02-08T21:02:23.04 0.6 undecidable manual P 97 105.3168 50 0.49 40
IV.RUFI.EHZ. 2023-02-08T21:02:23.12 0.6 undecidable manual S 12 60.9945 50 -0.79 39
GU.POPM.HHZ. 2023-02-08T21:02:22.17 0.3 undecidable manual P 330 95.1381 50 1.18 46
TV.SF11.HHZ. 2023-02-08T21:02:21.55 0.6 undecidable manual S 151 55.0005 50 -0.74 40
GU.MAIM.HHZ. 2023-02-08T21:02:21.36 0.3 undecidable manual P 315 96.6255 50 0.14 66
IV.CAFI.HHZ. 2023-02-08T21:02:20.05 0.6 undecidable manual S 86 50.1165 50 -0.94 37
IV.ATVO.HHZ. 2023-02-08T21:02:20.15 0.3 undecidable manual P 84 85.9473 50 0.57 61
IV.LMD.HHZ. 2023-02-08T21:02:20.52 0.3 undecidable manual P 18 90.8424 50 0.19 66
IV.SEI.HHZ. 2023-02-08T21:02:20.06 0.6 undecidable manual P 1 83.6496 50 0.85 36
IV.PARC.HHZ. 2023-02-08T21:02:19.20 0.3 undecidable manual P 61 81.4518 50 0.32 66
IV.MPPT.EHN. 2023-02-08T21:02:18.12 0.3 undecidable manual P 344 75.7686 50 0.12 69
IV.MGAB.HHZ. 2023-02-08T21:02:18.04 0.3 undecidable manual P 125 75.4689 50 0.09 70
IV.PII.HHZ. 2023-02-08T21:02:18.73 0.3 undecidable manual P 306 80.9523 50 -0.08 69
IV.SFI.EHZ. 2023-02-08T21:02:18.90 0.3 undecidable manual P 31 78.1662 50 0.53 63
IV.TRIF.CHZ. 2023-02-08T21:02:18.16 0.6 undecidable manual S 240 41.4252 50 -0.52 45
IV.BADI.EHZ. 2023-02-08T21:02:18.57 0.3 undecidable manual P 72 75.9684 50 0.54 63
IV.SSP9.EHZ. 2023-02-08T21:02:17.54 0.3 undecidable manual P 64 70.0743 50 0.41 66
IV.SACS.HHZ. 2023-02-08T21:02:17.17 1.0 undecidable manual P 137 67.7766 50 0.41 22
IV.VMGN.HHN. 2023-02-08T21:02:17.89 0.3 undecidable manual P 12 74.0703 50 0.15 69
IV.MALA4.EHN. 2023-02-08T21:02:16.30 0.6 undecidable manual S 162 34.4433 50 -0.5 46
IV.MALA1.EHN. 2023-02-08T21:02:16.01 0.6 undecidable manual S 162 34.5432 50 -0.84 40
IV.MALA0.EHN. 2023-02-08T21:02:16.35 0.6 undecidable manual S 163 34.2435 50 -0.42 47
IV.MCIV.CHZ. 2023-02-08T21:02:16.38 0.3 undecidable manual P 155 63.7917 50 0.23 69
IV.BOSL.HHE. 2023-02-08T21:02:16.80 0.3 undecidable manual P 2 69.9744 50 -0.31 67
IV.MALA5.EHZ. 2023-02-08T21:02:16.16 0.6 undecidable manual S 162 34.2435 50 -0.61 44
IV.CRMI.HNE. 2023-02-08T21:02:16.19 0.3 undecidable manual P 332 62.3931 50 0.25 69
IV.CRE.HHZ. 2023-02-08T21:02:15.84 0.3 undecidable manual P 54 60.1953 50 0.25 69
IV.RUFI.EHZ. 2023-02-08T21:02:15.58 0.3 undecidable manual P 12 60.9945 50 -0.15 71
IV.ARCI.HHZ. 2023-02-08T21:02:14.09 0.3 undecidable manual P 168 50.8158 50 -0.07 73
TV.SF11.HHZ. 2023-02-08T21:02:14.99 0.3 undecidable manual P 151 55.0005 50 0.2 71
IV.TRIF.CHZ. 2023-02-08T21:02:13.32 0.3 undecidable manual P 240 41.4252 50 0.61 65
IV.CAFI.HHZ. 2023-02-08T21:02:13.91 0.3 undecidable manual P 86 50.1165 50 -0.14 72
IV.OSSC.HHZ. 2023-02-08T21:02:13.11 0.6 undecidable manual S 342 26.0517 108 -0.93 39
IV.MALA5.EHZ. 2023-02-08T21:02:11.65 0.6 undecidable manual P 162 34.2435 50 0.04 51
IV.FROS.CHZ. 2023-02-08T21:02:11.91 0.6 undecidable manual S 237 18.3705 114 0.34 49
IV.MALA4.EHN. 2023-02-08T21:02:11.59 0.3 undecidable manual P 162 34.4433 50 -0.03 76
IV.MALA1.EHN. 2023-02-08T21:02:11.63 0.3 undecidable manual P 162 34.5432 50 -0.02 76
IV.MALA0.EHN. 2023-02-08T21:02:11.51 0.1 undecidable manual P 163 34.2435 50 -0.1 100
IV.CSNT.HHZ. 2023-02-08T21:02:10.96 0.6 undecidable manual S 347 19.6692 113 -1.01 38
IV.OSSC.HHZ. 2023-02-08T21:02:09.55 0.3 undecidable manual P 342 26.0517 108 -0.49 70
IV.CSNT.HHZ. 2023-02-08T21:02:08.35 0.3 undecidable manual P 347 19.6692 113 -0.48 71
IV.FROS.CHZ. 2023-02-08T21:02:08.85 0.3 undecidable manual P 237 18.3705 114 0.25 75
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:2.2 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:2.1 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:2.1 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:2.3 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