Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 09-02-2023 and time 08:17:44 (UTC) in region 3 km E Siena (SI)

A magnitude ML 2.0 earthquake occured in region: 3 km E Siena (SI), on

  • 09-02-2023 08:17:44 (UTC)
  • 09-02-2023 09:17:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3130, 11.3690 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
Siena SI 3 53903 53903
Monteroni d'Arbia SI 10 9088 62991
Castelnuovo Berardenga SI 12 9097 72088
Sovicille SI 12 10116 82204
Monteriggioni SI 15 9810 92014
Murlo SI 16 2389 94403
Asciano SI 18 7118 101521
Gaiole in Chianti SI 18 2758 104279
Castellina in Chianti SI 19 2859 107138
Rapolano Terme SI 19 5249 112387
Radda in Chianti SI 19 1613 114000

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km E of Siena (53903 inhabitants)
45 Km W of Arezzo (99543 inhabitants)
52 Km S of Firenze (382808 inhabitants)
52 Km SE of Scandicci (50609 inhabitants)
65 Km NE of Grosseto (82087 inhabitants)
67 Km SE of Prato (191150 inhabitants)
78 Km SE of Pistoia (90315 inhabitants)
86 Km W of Perugia (166134 inhabitants)
90 Km E of Livorno (159219 inhabitants)
90 Km SE of Pisa (89158 inhabitants)
92 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 2.0 2023-02-09
08:17:44		 43.313 11.3687 9 2024-03-01
17:17:57		 Bollettino Sismico Italiano INGV 115068841
Reviewed
Rev100 		ML 2.0 2023-02-09
08:17:44		 43.3287 11.3517 8 2023-02-09
08:31:51		 Sala Sismica INGV-Roma 114286681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 08:17:44 ± 0.11
Latitude 43.3130 ± 0.0045
Longitude 11.3687 ± 0.0111
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 115068841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 855
Semi-minor axis of confidence ellipse (meter) 508
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 291
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 39
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) 0.16997
Epicentral distance of station farthest from the epicenter (degree) 0.80220
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 115068841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-09-19 09:23:40

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 114286681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 08:31:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2023-02-09T08:18:03.10 0.6 undecidable manual S 54 57.8976 50 0.53 43
IV.RUFI.EHZ. 2023-02-09T08:18:02.60 0.3 undecidable manual S 11 59.2962 50 -0.35 67
TV.SF11.HHZ. 2023-02-09T08:18:01.09 0.3 undecidable manual S 153 55.3002 50 -0.79 58
IV.ARCI.HHZ. 2023-02-09T08:18:01.49 0.6 undecidable manual S 170 51.9036 50 0.53 43
IV.CAFI.HHZ. 2023-02-09T08:17:59.36 0.3 undecidable manual S 88 48.3183 50 -0.64 63
IV.LMD.HHZ. 2023-02-09T08:17:59.35 0.3 undecidable manual P 18 89.0442 50 -0.26 64
IV.PARC.HHZ. 2023-02-09T08:17:58.51 0.3 undecidable manual P 62 79.2651 50 0.4 64
IV.MGAB.HHZ. 2023-02-09T08:17:58.25 0.6 undecidable manual P 126 74.8695 50 0.83 37
IV.SFI.EHZ. 2023-02-09T08:17:58.32 0.3 undecidable manual P 30 76.0683 50 0.71 58
IV.PII.HHZ. 2023-02-09T08:17:58.82 0.6 undecidable manual P 304 81.6516 50 0.36 43
IV.BADI.EHE. 2023-02-09T08:17:58.08 0.3 undecidable manual P 73 73.8705 50 0.81 56
IV.TRIF.CHZ. 2023-02-09T08:17:58.60 0.6 undecidable manual S 240 43.623 50 -0.15 48
IV.ATVA.EHE. 2023-02-09T08:17:57.24 0.6 undecidable manual P 93 74.0703 50 -0.07 46
IV.SACS.HHE. 2023-02-09T08:17:57.02 0.3 undecidable manual P 139 67.5768 50 0.72 59
IV.ATMI.HHZ. 2023-02-09T08:17:57.23 0.6 undecidable manual P 88 72.5718 50 0.15 45
IV.CASP.HHZ. 2023-02-09T08:17:57.81 0.6 undecidable manual P 215 70.8735 50 1.01 34
IV.MCIV.CHE. 2023-02-09T08:17:56.01 0.3 undecidable manual P 157 64.2912 50 0.21 68
IV.MALA5.EHN. 2023-02-09T08:17:56.01 0.3 undecidable manual S 165 35.0427 50 -0.47 68
IV.MALA1.EHN. 2023-02-09T08:17:56.10 0.3 undecidable manual S 166 35.4423 50 -0.46 68
IV.ATMC.EHE. 2023-02-09T08:17:56.78 0.6 undecidable manual P 77 68.0763 50 0.4 43
IV.MALA4.EHZ. 2023-02-09T08:17:56.00 0.3 undecidable manual S 165 35.2425 50 -0.51 67
IV.SSP9.EHZ. 2023-02-09T08:17:56.42 0.6 undecidable manual P 65 67.8765 50 0.07 47
IV.MALA0.EHN. 2023-02-09T08:17:56.10 0.3 undecidable manual S 166 35.1426 50 -0.39 69
IV.CRE.HHZ. 2023-02-09T08:17:55.41 0.6 undecidable manual P 54 57.8976 50 0.6 42
IV.RUFI.EHZ. 2023-02-09T08:17:55.10 0.3 undecidable manual P 11 59.2962 50 0.07 71
IV.ARCI.HHZ. 2023-02-09T08:17:54.05 0.3 undecidable manual P 170 51.9036 50 0.17 70
IV.OSSC.HHZ. 2023-02-09T08:17:53.00 0.3 undecidable manual S 337 25.3524 110 -0.56 67
TV.SF11.HHZ. 2023-02-09T08:17:53.97 0.6 undecidable manual P 153 55.3002 50 -0.44 44
IV.CAFI.HHZ. 2023-02-09T08:17:53.39 0.3 undecidable manual P 88 48.3183 50 0.07 72
IV.TRIF.CHZ. 2023-02-09T08:17:53.19 0.3 undecidable manual P 240 43.623 50 0.58 65
IV.FROS.CHZ. 2023-02-09T08:17:52.30 0.3 undecidable manual S 236 20.6682 114 0.27 73
IV.MALA0.EHN. 2023-02-09T08:17:51.29 0.1 undecidable manual P 166 35.1426 50 -0.01 100
IV.MALA1.EHN. 2023-02-09T08:17:51.29 0.1 undecidable manual P 166 35.4423 50 -0.05 99
IV.MALA4.EHZ. 2023-02-09T08:17:51.23 0.3 undecidable manual P 165 35.2425 50 -0.08 74
IV.CSNT.HHZ. 2023-02-09T08:17:50.90 0.3 undecidable manual S 340 18.87 116 -0.57 68
IV.MALA5.EHN. 2023-02-09T08:17:50.71 0.3 undecidable manual P 165 35.0427 50 -0.58 66
IV.FROS.CHZ. 2023-02-09T08:17:49.08 0.1 undecidable manual P 236 20.6682 114 0.35 95
IV.OSSC.HHZ. 2023-02-09T08:17:49.31 0.1 undecidable manual P 337 25.3524 110 -0.3 96
IV.CSNT.HHZ. 2023-02-09T08:17:48.15 0.1 undecidable manual P 340 18.87 116 -0.25 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:2.5 0.0023403779999999997 0.1408 AML other m 2023-02-09T08:17:51.21
IV.CSNT.HHN. ML:2.3 0.0015383075 0.1216 AML other m 2023-02-09T08:17:51.48
IV.FROS.CHE. ML:2.4 0.001891478 0.1536 AML other m 2023-02-09T08:17:52.48
IV.FROS.CHN. ML:2.6 0.002665 1.84 AML other m 2023-02-09T08:17:52.98
IV.OSSC.HHE. ML:2.1 0.0007356348500000001 0.1408 AML other m 2023-02-09T08:17:53.31
IV.OSSC.HHN. ML:2.1 0.000824 0.26 AML other m 2023-02-09T08:17:53.92
IV.CAFI.HHN. ML:1.9 0.00020306425 0.4032 AML other m 2023-02-09T08:18:00.53
IV.CAFI.HNN. ML:1.8 0.000196221645 0.3968 AML other m 2023-02-09T08:18:00.54
IV.ARCI.HHE. ML:2.1 0.0002831948 0.1408 AML other m 2023-02-09T08:18:02.48
IV.ARCI.HNE. ML:2.0 0.00027165364999999996 0.1472 AML other m 2023-02-09T08:18:02.49
IV.CAFI.HHE. ML:1.8 0.0001527322 0.32 AML other m 2023-02-09T08:18:03.20
IV.CAFI.HNE. ML:1.7 0.00014861269999999997 0.352 AML other m 2023-02-09T08:18:02.87
IV.RUFI.EHE. ML:1.9 0.00014781630000000002 0.5952 AML other m 2023-02-09T08:18:03.08
IV.ARCI.HHN. ML:2.2 0.00044573715000000003 0.224 AML other m 2023-02-09T08:18:03.46
IV.ARCI.HNN. ML:2.2 0.0004240026 0.224 AML other m 2023-02-09T08:18:03.47
IV.CRE.HHE. ML:2.0 0.0002185 0.44 AML other m 2023-02-09T08:18:03.59
IV.RUFI.EHN. ML:1.7 0.00010051827 0.4224 AML other m 2023-02-09T08:18:04.74
IV.SSP9.EHE. ML:1.8 0.0001218305 1.5648 AML other m 2023-02-09T08:18:07.08
IV.CRE.HHN. ML:2.1 0.0002565 0.28 AML other m 2023-02-09T08:18:07.28
IV.CASP.HHE. ML:2.1 0.0002133691 0.32 AML other m 2023-02-09T08:18:09.06
IV.PARC.HHN. ML:1.8 0.000087145695 0.4416 AML other m 2023-02-09T08:18:09.51
IV.SSP9.EHN. ML:2.0 0.0001884672 1.6608 AML other m 2023-02-09T08:18:10.04
IV.SFI.EHE. ML:1.8 0.000096126585 0.6976 AML other m 2023-02-09T08:18:11.47
IV.SFI.EHN. ML:1.5 0.00005171088 0.2432 AML other m 2023-02-09T08:18:11.78
IV.ATMI.HHE. ML:2.3 0.00034218635 0.3008 AML other m 2023-02-09T08:18:12.68
IV.LMD.HHN. ML:1.7 0.00005739444 0.2368 AML other m 2023-02-09T08:18:12.73
IV.ATMI.HHN. ML:2.1 0.00021945795000000002 0.3776 AML other m 2023-02-09T08:18:14.08
IV.LMD.HHE. ML:1.7 0.000054760035 0.2048 AML other m 2023-02-09T08:18:14.20
IV.SFI.HNE. ML:2.0 0.0001636506 0.8 AML other m 2023-02-09T08:18:16.61
IV.PARC.HHE. ML:1.7 0.00006877632 0.7808 AML other m 2023-02-09T08:18:16.68
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