Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 09-02-2023 and time 11:04:26 (Italy) in region 2 km E Siena (SI)

A magnitude ML 2.3 earthquake occured in region: 2 km E Siena (SI), on

  • 09-02-2023 10:04:26 (UTC)
  • 09-02-2023 11:04:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3100, 11.3590 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.

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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 11 10116 73107
Castelnuovo Berardenga SI 12 9097 82204
Monteriggioni SI 15 9810 92014
Murlo SI 16 2389 94403
Asciano SI 18 7118 101521
Gaiole in Chianti SI 19 2758 104279
Castellina in Chianti SI 19 2859 107138
Radda in Chianti SI 20 1613 108751

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km E of Siena (53903 inhabitants)
46 Km W of Arezzo (99543 inhabitants)
52 Km S of Firenze (382808 inhabitants)
52 Km S of Scandicci (50609 inhabitants)
64 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)
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
Bulletin
Rev1000 		ML 2.3 2023-02-09
10:04:26		 43.3098 11.3593 8 2024-03-01
17:17:59		 Bollettino Sismico Italiano INGV 115623921
Reviewed
Rev100 		ML 2.3 2023-02-09
10:04:26		 43.3203 11.3378 10 2023-02-09
10:14:06		 Sala Sismica INGV-Roma 114291391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 10:04:26 ± 0.13
Latitude 43.3098 ± 0.0054
Longitude 11.3593 ± 0.0111
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 115623921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 894
Semi-minor axis of confidence ellipse (meter) 521
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 293
Circular confidence region, given by single value of horizontal uncertainty (meter) 890.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 42
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.17087
Epicentral distance of station farthest from the epicenter (degree) 1.26714
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 52
Type of magnitude ML
Reference to an origin 114291391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 10:14:06

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 54
Type of magnitude ML
Reference to an origin 115623921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-10-20 14:06:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2023-02-09T10:04:51.74 0.6 undecidable manual P 89 140.6481 50 1.82 19
IV.SSP9.EHZ. 2023-02-09T10:04:47.81 0.6 undecidable manual S 65 68.6757 50 -0.08 47
IV.MOMA.HHZ. 2023-02-09T10:04:46.42 0.6 undecidable manual P 119 112.998 50 0.75 36
IV.CRE.HHZ. 2023-02-09T10:04:45.41 0.3 undecidable manual S 54 58.6968 50 0.19 71
IV.RUFI.EHZ. 2023-02-09T10:04:45.01 0.6 undecidable manual S 12 59.7957 50 -0.5 44
IV.MURB.HHZ. 2023-02-09T10:04:44.37 0.6 undecidable manual P 93 94.239 50 1.6 24
IV.ARCI.HHZ. 2023-02-09T10:04:43.76 0.3 undecidable manual S 169 51.6039 50 0.43 68
TV.SF11.HHZ. 2023-02-09T10:04:43.52 0.3 undecidable manual S 152 55.4001 50 -0.8 59
GU.POPM.HHZ. 2023-02-09T10:04:43.63 1.0 undecidable manual P 330 94.8384 50 0.77 19
IV.SEI.HHZ. 2023-02-09T10:04:42.24 0.6 undecidable manual P 360 82.5507 50 1.26 30
IV.LMD.HHZ. 2023-02-09T10:04:42.33 0.3 undecidable manual P 18 89.6436 50 0.27 66
IV.CAFI.HHZ. 2023-02-09T10:04:41.39 0.6 undecidable manual S 87 49.0176 50 -1.24 32
IV.MGAB.HHZ. 2023-02-09T10:04:40.28 0.3 undecidable manual P 126 75.1692 50 0.44 65
IV.TRIF.CHZ. 2023-02-09T10:04:40.73 0.3 undecidable manual S 240 42.8238 50 -0.24 72
IV.PARC.HHZ. 2023-02-09T10:04:40.80 0.3 undecidable manual P 62 80.1642 50 0.2 68
IV.SFI.EHZ. 2023-02-09T10:04:40.32 0.3 undecidable manual P 31 76.7676 50 0.24 68
IV.BADI.EHZ. 2023-02-09T10:04:40.22 0.6 undecidable manual P 72 74.6697 50 0.46 43
IV.SSP9.EHZ. 2023-02-09T10:04:39.12 0.6 undecidable manual P 65 68.6757 50 0.28 45
IV.CASP.HHZ. 2023-02-09T10:04:39.86 0.3 undecidable manual P 215 70.1742 50 0.8 57
IV.SACS.HHZ. 2023-02-09T10:04:39.09 0.3 undecidable manual P 139 67.7766 50 0.39 67
IV.ATMI.HHZ. 2023-02-09T10:04:39.77 0.6 undecidable manual P 88 73.371 50 0.21 46
IV.MALA5.EHE. 2023-02-09T10:04:38.14 0.3 undecidable manual S 164 34.9428 50 -0.73 63
IV.MALA3.EHE. 2023-02-09T10:04:38.61 0.6 undecidable manual S 164 35.1426 50 -0.32 48
IV.MALA4.EHE. 2023-02-09T10:04:38.37 0.3 undecidable manual S 164 35.0427 50 -0.54 68
IV.MCIV.CHZ. 2023-02-09T10:04:38.11 0.3 undecidable manual P 156 64.2912 50 -0.05 72
IV.MALA1.EHE. 2023-02-09T10:04:38.26 0.3 undecidable manual S 164 35.2425 50 -0.69 64
IV.CRE.HHZ. 2023-02-09T10:04:37.70 0.6 undecidable manual P 54 58.6968 50 0.4 45
IV.RUFI.EHZ. 2023-02-09T10:04:37.39 0.3 undecidable manual P 12 59.7957 50 -0.08 72
IV.ARCI.HHZ. 2023-02-09T10:04:36.03 0.3 undecidable manual P 169 51.6039 50 -0.18 72
TV.SF11.HHZ. 2023-02-09T10:04:36.74 0.3 undecidable manual P 152 55.4001 50 -0.04 73
IV.OSSC.HHZ. 2023-02-09T10:04:35.28 0.6 undecidable manual S 339 25.4523 108 -0.48 47
IV.TRIF.CHZ. 2023-02-09T10:04:35.17 0.3 undecidable manual P 240 42.8238 50 0.33 71
IV.CAFI.HHZ. 2023-02-09T10:04:35.35 0.3 undecidable manual P 87 49.0176 50 -0.45 68
IV.FROS.CHZ. 2023-02-09T10:04:34.27 0.3 undecidable manual S 236 19.869 113 0.33 74
IV.CSNT.HHZ. 2023-02-09T10:04:33.02 0.3 undecidable manual S 343 18.9699 114 -0.64 67
IV.MALA1.EHE. 2023-02-09T10:04:33.70 0.3 undecidable manual P 164 35.2425 50 0.02 77
IV.MALA5.EHE. 2023-02-09T10:04:33.54 0.3 undecidable manual P 164 34.9428 50 -0.09 75
IV.MALA3.EHE. 2023-02-09T10:04:33.93 0.3 undecidable manual P 164 35.1426 50 0.26 73
IV.MALA4.EHE. 2023-02-09T10:04:33.44 0.3 undecidable manual P 164 35.0427 50 -0.21 74
IV.OSSC.HHZ. 2023-02-09T10:04:31.32 0.3 undecidable manual P 339 25.4523 108 -0.51 70
IV.FROS.CHZ. 2023-02-09T10:04:31.03 0.1 undecidable manual P 236 19.869 113 0.25 100
IV.CSNT.HHZ. 2023-02-09T10:04:30.15 0.1 undecidable manual P 343 18.9699 114 -0.48 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:2.9 0.0072800074999999995 0.16 AML other m 2023-02-09T10:04:33.46
IV.CSNT.HHN. ML:2.8 0.00536 0.2 AML other m 2023-02-09T10:04:33.57
IV.FROS.CHN. ML:2.6 0.003339575 0.2176 AML other m 2023-02-09T10:04:35.16
IV.OSSC.HHE. ML:2.5 0.001790978 0.1792 AML other m 2023-02-09T10:04:35.73
IV.FROS.CHE. ML:2.5 0.002394414 0.2944 AML other m 2023-02-09T10:04:35.80
IV.OSSC.HHN. ML:2.6 0.002615 1.64 AML other m 2023-02-09T10:04:35.01
IV.TRIF.CHN. ML:2.2 0.00059265505 0.1472 AML other m 2023-02-09T10:04:41.80
IV.TRIF.CHE. ML:2.3 0.0007395 0.24 AML other m 2023-02-09T10:04:42.16
IV.CAFI.HHN. ML:2.4 0.0006179228 1.5584 AML other m 2023-02-09T10:04:43.81
IV.CAFI.HNN. ML:2.4 0.00061640285 1.5584 AML other m 2023-02-09T10:04:43.81
IV.ARCI.HNN. ML:2.8 0.001449348 0.2112 AML other m 2023-02-09T10:04:44.97
IV.ARCI.HHN. ML:2.8 0.0015150604999999999 0.1984 AML other m 2023-02-09T10:04:44.97
IV.ARCI.HNE. ML:2.5 0.00081400205 0.16 AML other m 2023-02-09T10:04:45.18
IV.ARCI.HHE. ML:2.5 0.0008896169000000001 0.16 AML other m 2023-02-09T10:04:45.18
IV.RUFI.EHE. ML:2.3 0.00040028025 0.64 AML other m 2023-02-09T10:04:45.63
IV.CAFI.HHE. ML:2.3 0.0005573333999999999 0.3008 AML other m 2023-02-09T10:04:45.18
IV.CAFI.HNE. ML:2.3 0.0005479643000000001 0.3136 AML other m 2023-02-09T10:04:45.18
IV.RUFI.EHN. ML:2.2 0.0003305 1.44 AML other m 2023-02-09T10:04:46.98
IV.CRE.HHE. ML:2.4 0.000492 0.76 AML other m 2023-02-09T10:04:47.74
IV.MCIV.CHN. ML:2.2 0.0002734898 0.288 AML other m 2023-02-09T10:04:49.02
IV.SSP9.EHE. ML:2.2 0.0002969121 0.4224 AML other m 2023-02-09T10:04:49.33
IV.CRE.HHN. ML:2.4 0.0006094999999999999 0.3 AML other m 2023-02-09T10:04:49.55
IV.MCIV.CHE. ML:2.1 0.00021722980000000002 0.288 AML other m 2023-02-09T10:04:50.21
IV.SACS.HNN. ML:2.2 0.00025929825 0.3008 AML other m 2023-02-09T10:04:50.57
IV.CASP.HHN. ML:2.4 0.00045599999999999997 0.62 AML other m 2023-02-09T10:04:51.21
IV.CASP.HNN. ML:2.4 0.00046755809999999995 0.5568 AML other m 2023-02-09T10:04:51.25
IV.CASP.HHE. ML:2.4 0.00037574245 0.3392 AML other m 2023-02-09T10:04:51.45
IV.CASP.HNE. ML:2.3 0.00035107095 0.32 AML other m 2023-02-09T10:04:51.31
IV.SACS.HHE. ML:2.1 0.000235 0.2 AML other m 2023-02-09T10:04:51.43
IV.SACS.HNE. ML:2.2 0.0002459255 0.2944 AML other m 2023-02-09T10:04:51.44
IV.SACS.HHN. ML:2.1 0.0002320464 0.224 AML other m 2023-02-09T10:04:52.10
IV.SSP9.EHN. ML:2.3 0.00032695655 0.3456 AML other m 2023-02-09T10:04:52.33
IV.BADI.EHE. ML:2.2 0.00026609515 0.3392 AML other m 2023-02-09T10:04:52.81
IV.SFI.EHE. ML:2.2 0.0002285915 0.64 AML other m 2023-02-09T10:04:52.60
IV.SFI.HNE. ML:2.2 0.00022233449999999998 0.5696 AML other m 2023-02-09T10:04:52.64
IV.SFI.HNN. ML:2.2 0.00021584405000000002 0.5504 AML other m 2023-02-09T10:04:53.53
IV.SFI.EHN. ML:2.0 0.0001343874 0.4992 AML other m 2023-02-09T10:04:53.51
IV.PARC.HHE. ML:2.0 0.00015137315 0.3392 AML other m 2023-02-09T10:04:53.30
IV.MGAB.HHE. ML:2.2 0.00022398060000000002 0.1984 AML other m 2023-02-09T10:04:53.62
IV.PARC.HHN. ML:2.1 0.0001624226 0.2368 AML other m 2023-02-09T10:04:54.26
IV.BADI.EHN. ML:2.2 0.0002305 0.32 AML other m 2023-02-09T10:04:54.67
IV.ATMI.HHE. ML:2.8 0.0009539742 1.6608 AML other m 2023-02-09T10:04:54.94
IV.MGAB.HHN. ML:2.3 0.00029400000000000004 0.28 AML other m 2023-02-09T10:04:56.05
IV.MGAB.HNN. ML:2.2 0.00025685755 0.2688 AML other m 2023-02-09T10:04:56.05
IV.ATMI.HHN. ML:2.6 0.0006879999999999999 0.44 AML other m 2023-02-09T10:04:57.39
IV.LMD.HHN. ML:2.2 0.00017190665 0.32 AML other m 2023-02-09T10:04:58.23
IV.LMD.HHE. ML:2.0 0.00012145359999999999 0.4224 AML other m 2023-02-09T10:04:58.88
IV.MGAB.HNE. ML:2.2 0.00024517365 0.4736 AML other m 2023-02-09T10:04:59.28
GU.POPM.HHN. ML:2.2 0.0001531284 0.2176 AML other m 2023-02-09T10:04:59.52
GU.POPM.HHE. ML:2.0 0.00011649999999999999 1.18 AML other m 2023-02-09T10:05:01.09
IV.MOMA.HNE. ML:2.3 0.0001634331 0.8 AML other m 2023-02-09T10:05:04.57
IV.MOMA.HHE. ML:2.0 0.00008539704000000001 0.2624 AML other m 2023-02-09T10:05:06.78
IV.MOMA.HHN. ML:2.2 0.00011619999999999999 0.44 AML other m 2023-02-09T10:05:08.26
IV.MOMA.HNN. ML:2.3 0.00017551885000000001 0.8896 AML other m 2023-02-09T10:05:20.64
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