Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 09-02-2023 and time 23:18:21 (Italy) in region 2 km E Siena (SI)

A magnitude ML 1.7 earthquake occured in region: 2 km E Siena (SI), on

  • 09-02-2023 22:18:21 (UTC)
  • 09-02-2023 23:18:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3140, 11.3630 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
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 18 2758 104279
Castellina in Chianti SI 19 2859 107138
Radda in Chianti SI 19 1613 108751
Rapolano Terme SI 20 5249 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)
51 Km S of Firenze (382808 inhabitants)
52 Km S 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)
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 1.7 2023-02-09
22:18:21		 43.3143 11.3627 9 2024-03-01
17:17:59		 Bollettino Sismico Italiano INGV 115626901
Reviewed
Rev100 		ML 1.7 2023-02-09
22:18:21		 43.3237 11.378 5 2023-02-09
22:31:35		 Sala Sismica INGV-Roma 114308311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 22:18:21 ± 0.1
Latitude 43.3143 ± 0.0036
Longitude 11.3627 ± 0.0074
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 115626901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 459
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.16727
Epicentral distance of station farthest from the epicenter (degree) 0.93080
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:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 54
Type of magnitude ML
Reference to an origin 115626901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-10-22 17:05:11

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 54
Type of magnitude ML
Reference to an origin 114308311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 22:31:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2023-02-09T22:18:45.10 1.0 undecidable manual S 126 75.2691 50 0.52 21
IV.SSP9.EHZ. 2023-02-09T22:18:43.00 0.6 undecidable manual S 65 68.2761 50 0.3 45
IV.ATMI.HHZ. 2023-02-09T22:18:43.82 0.3 undecidable manual S 88 73.0713 50 -0.17 69
IV.BOSL.HHZ. 2023-02-09T22:18:42.40 0.3 undecidable manual S 1 68.376 50 -0.34 67
IV.CRE.HHZ. 2023-02-09T22:18:40.31 0.3 undecidable manual S 54 58.1973 50 0.29 69
IV.CRMI.HHZ. 2023-02-09T22:18:40.59 0.6 undecidable manual S 330 61.5939 50 -0.33 46
IV.BDI.HHZ. 2023-02-09T22:18:39.84 0.3 undecidable manual P 324 103.3188 50 0.71 56
IV.RUFI.EHZ. 2023-02-09T22:18:39.72 0.6 undecidable manual S 11 59.2962 50 -0.58 43
GU.MAIM.HHZ. 2023-02-09T22:18:38.51 0.3 undecidable manual P 314 96.4257 50 0.44 63
TV.SF11.HHE. 2023-02-09T22:18:38.54 1.0 undecidable manual S 153 55.6998 50 -0.81 20
GU.POPM.HHZ. 2023-02-09T22:18:38.02 0.3 undecidable manual P 329 94.5387 50 0.25 65
IV.ARCI.HHZ. 2023-02-09T22:18:37.68 0.6 undecidable manual S 170 52.1034 50 -0.71 41
IV.LMD.HHZ. 2023-02-09T22:18:37.15 0.3 undecidable manual P 18 89.0442 50 0.22 66
IV.SEI.HHZ. 2023-02-09T22:18:36.31 1.0 undecidable manual P 360 82.0512 50 0.46 21
IV.ATVO.HHZ. 2023-02-09T22:18:36.63 0.6 undecidable manual P 85 84.5487 50 0.4 43
IV.CAFI.HHZ. 2023-02-09T22:18:36.60 0.3 undecidable manual S 88 48.7179 50 -0.89 58
IV.ATPI.EHZ. 2023-02-09T22:18:36.82 0.3 undecidable manual P 79 85.1481 50 0.49 63
IV.MGAB.HHZ. 2023-02-09T22:18:35.02 0.6 undecidable manual P 126 75.2691 50 0.21 46
IV.PII.HHZ. 2023-02-09T22:18:35.71 0.3 undecidable manual P 304 81.1521 50 0 71
IV.BADI.EHZ. 2023-02-09T22:18:35.04 0.3 undecidable manual P 73 74.2701 50 0.39 66
IV.CASP.HHZ. 2023-02-09T22:18:35.00 0.3 undecidable manual P 215 70.6737 50 0.9 55
IV.PARC.HHZ. 2023-02-09T22:18:35.77 0.3 undecidable manual P 62 79.6647 50 0.29 67
IV.TRIF.CHZ. 2023-02-09T22:18:35.81 0.3 undecidable manual S 239 43.3233 50 -0.22 72
IV.SACS.HHZ. 2023-02-09T22:18:34.04 0.3 undecidable manual P 139 68.0763 50 0.35 67
IV.SSP9.EHZ. 2023-02-09T22:18:34.18 0.3 undecidable manual P 65 68.2761 50 0.45 66
IV.ATMI.HHZ. 2023-02-09T22:18:34.86 0.6 undecidable manual P 88 73.0713 50 0.39 44
IV.MALA4.EHZ. 2023-02-09T22:18:33.40 0.6 undecidable manual S 165 35.5422 50 -0.55 45
IV.MCIV.CHZ. 2023-02-09T22:18:33.24 0.3 undecidable manual P 157 64.6908 50 0.07 72
IV.MALA1.EHZ. 2023-02-09T22:18:33.48 0.3 undecidable manual S 165 35.6421 50 -0.52 69
IV.BOSL.HHZ. 2023-02-09T22:18:33.72 0.3 undecidable manual P 1 68.376 50 -0.03 72
IV.MALA0.EHZ. 2023-02-09T22:18:33.44 0.3 undecidable manual S 165 35.4423 50 -0.49 69
IV.MALA2.EHN. 2023-02-09T22:18:33.51 0.3 undecidable manual S 165 35.742 50 -0.5 69
IV.RUFI.EHZ. 2023-02-09T22:18:32.49 0.3 undecidable manual P 11 59.2962 50 0.15 71
IV.CRE.HHZ. 2023-02-09T22:18:32.61 0.3 undecidable manual P 54 58.1973 50 0.43 67
IV.CRMI.HHZ. 2023-02-09T22:18:32.96 0.3 undecidable manual P 330 61.5939 50 0.26 70
TV.SF11.HHE. 2023-02-09T22:18:31.92 0.1 undecidable manual P 153 55.6998 50 0.13 96
IV.ARCI.HHZ. 2023-02-09T22:18:31.37 0.1 undecidable manual P 170 52.1034 50 0.13 97
IV.TRIF.CHZ. 2023-02-09T22:18:30.13 0.3 undecidable manual P 239 43.3233 50 0.26 72
IV.OSSC.HHZ. 2023-02-09T22:18:30.01 0.3 undecidable manual S 338 25.0527 109 -0.65 67
IV.CAFI.HHZ. 2023-02-09T22:18:30.68 0.3 undecidable manual P 88 48.7179 50 -0.04 74
IV.FROS.CHZ. 2023-02-09T22:18:29.51 0.3 undecidable manual S 235 20.3685 113 0.38 73
IV.MALA1.EHZ. 2023-02-09T22:18:28.60 0.3 undecidable manual P 165 35.6421 50 -0.1 75
IV.MALA0.EHZ. 2023-02-09T22:18:28.54 0.1 undecidable manual P 165 35.4423 50 -0.12 100
IV.MALA2.EHN. 2023-02-09T22:18:28.56 0.3 undecidable manual P 165 35.742 50 -0.15 75
IV.MALA4.EHZ. 2023-02-09T22:18:28.46 0.3 undecidable manual P 165 35.5422 50 -0.22 74
IV.CSNT.HHZ. 2023-02-09T22:18:27.98 0.1 undecidable manual S 342 18.5703 115 -0.59 92
IV.OSSC.HHZ. 2023-02-09T22:18:26.36 0.1 undecidable manual P 338 25.0527 109 -0.41 96
IV.FROS.CHZ. 2023-02-09T22:18:26.23 0.1 undecidable manual P 235 20.3685 113 0.34 98
IV.CSNT.HHZ. 2023-02-09T22:18:25.24 0.1 undecidable manual P 342 18.5703 115 -0.32 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.1 0.0011159938 0.128 AML other m 2023-02-09T22:18:28.04
IV.CSNT.HHE. ML:2.2 0.0014118635000000001 0.128 AML other m 2023-02-09T22:18:28.20
IV.FROS.CHE. ML:2.1 0.001044 0.16 AML other m 2023-02-09T22:18:29.64
IV.FROS.CHN. ML:2.3 0.0016699999999999998 0.18 AML other m 2023-02-09T22:18:30.15
IV.OSSC.HHN. ML:1.9 0.00045 0.22 AML other m 2023-02-09T22:18:30.82
IV.OSSC.HHE. ML:1.8 0.00036889655 0.3328 AML other m 2023-02-09T22:18:32.31
IV.TRIF.CHE. ML:1.8 0.0002115 0.26 AML other m 2023-02-09T22:18:36.56
IV.CAFI.HHE. ML:1.6 0.00012194779999999999 0.2432 AML other m 2023-02-09T22:18:37.29
IV.CAFI.HNE. ML:1.6 0.000116313995 0.2432 AML other m 2023-02-09T22:18:37.30
IV.TRIF.CHN. ML:1.7 0.0001580231 0.256 AML other m 2023-02-09T22:18:37.27
IV.CAFI.HHN. ML:1.7 0.000147685855 0.192 AML other m 2023-02-09T22:18:37.75
IV.CAFI.HNN. ML:1.7 0.00013875827 0.2048 AML other m 2023-02-09T22:18:37.75
IV.ARCI.HHN. ML:1.9 0.00020390380000000002 0.1408 AML other m 2023-02-09T22:18:39.96
IV.ARCI.HNN. ML:1.9 0.00019375304999999998 0.1408 AML other m 2023-02-09T22:18:39.90
IV.ARCI.HNE. ML:1.8 0.000159399055 0.1792 AML other m 2023-02-09T22:18:40.60
IV.ARCI.HHE. ML:1.9 0.00018685860000000002 0.256 AML other m 2023-02-09T22:18:40.60
IV.RUFI.EHN. ML:1.7 0.000098723065 0.3456 AML other m 2023-02-09T22:18:40.80
IV.RUFI.EHE. ML:1.9 0.0001555 0.62 AML other m 2023-02-09T22:18:41.34
IV.CRE.HHE. ML:1.6 0.000080787125 0.3712 AML other m 2023-02-09T22:18:42.64
IV.CRE.HHN. ML:1.6 0.00009559165 1.7568 AML other m 2023-02-09T22:18:43.94
IV.BOSL.HHN. ML:1.5 0.00005627455 0.1792 AML other m 2023-02-09T22:18:43.21
IV.BOSL.HHE. ML:1.7 0.000094483735 0.2432 AML other m 2023-02-09T22:18:43.19
IV.CRMI.HHN. ML:1.3 0.000038732255 1.6416 AML other m 2023-02-09T22:18:44.12
IV.CRMI.HHE. ML:1.2 0.000036206547 1.5392 AML other m 2023-02-09T22:18:44.13
IV.SSP9.EHE. ML:1.7 0.000082390135 0.4096 AML other m 2023-02-09T22:18:44.43
IV.SACS.HNN. ML:2.0 0.00017749530000000003 0.64 AML other m 2023-02-09T22:18:44.60
IV.MCIV.CHE. ML:1.4 0.00004655604 0.256 AML other m 2023-02-09T22:18:45.21
IV.CASP.HHE. ML:1.7 0.00008973106 1.7184 AML other m 2023-02-09T22:18:46.03
IV.CASP.HHN. ML:1.8 0.00009385 1.56 AML other m 2023-02-09T22:18:46.96
IV.SACS.HHE. ML:1.4 0.000041536055 0.1792 AML other m 2023-02-09T22:18:46.52
IV.MCIV.CHN. ML:1.4 0.000051325325 1.5392 AML other m 2023-02-09T22:18:47.79
IV.SSP9.EHN. ML:1.7 0.00008205840000000001 1.5392 AML other m 2023-02-09T22:18:47.23
IV.SACS.HHN. ML:1.4 0.000045950144999999995 1.6288 AML other m 2023-02-09T22:18:47.87
IV.BADI.EHE. ML:1.6 0.000058974515000000004 0.32 AML other m 2023-02-09T22:18:48.19
IV.MGAB.HHN. ML:1.8 0.00009359999999999998 0.22 AML other m 2023-02-09T22:18:48.00
IV.PII.HHN. ML:1.8 0.00008540471499999999 0.2816 AML other m 2023-02-09T22:18:48.94
IV.PARC.HHN. ML:1.6 0.00005305600000000001 0.2304 AML other m 2023-02-09T22:18:49.27
IV.SEI.HHE. ML:2.1 0.00017549999999999998 0.5 AML other m 2023-02-09T22:18:49.39
IV.MGAB.HHE. ML:1.6 0.000058796145 0.2304 AML other m 2023-02-09T22:18:49.46
IV.SEI.HHN. ML:2.3 0.0002665 0.34 AML other m 2023-02-09T22:18:49.65
IV.ATPI.EHN. ML:1.6 0.000042589465 0.4608 AML other m 2023-02-09T22:18:49.72
IV.BADI.EHN. ML:1.5 0.0000478751 0.384 AML other m 2023-02-09T22:18:49.75
IV.PII.HHE. ML:1.6 0.000055388065000000003 1.6416 AML other m 2023-02-09T22:18:49.84
IV.ATVO.HHE. ML:1.6 0.00005247582 1.5264 AML other m 2023-02-09T22:18:49.14
IV.ATVO.HHN. ML:1.6 0.000046473075000000006 1.5392 AML other m 2023-02-09T22:18:50.96
IV.ATMI.HHE. ML:2.1 0.00021426760000000002 0.32 AML other m 2023-02-09T22:18:50.05
IV.LMD.HHE. ML:1.5 0.000034129073000000004 1.68 AML other m 2023-02-09T22:18:50.85
IV.ATPI.EHE. ML:1.6 0.000047425910000000003 0.4608 AML other m 2023-02-09T22:18:51.15
IV.ATMI.HHN. ML:2.0 0.0001735 0.62 AML other m 2023-02-09T22:18:51.54
IV.LMD.HHN. ML:1.5 0.000038216415 1.5392 AML other m 2023-02-09T22:18:52.01
IV.PARC.HHE. ML:1.5 0.000037812375 0.3968 AML other m 2023-02-09T22:18:52.03
IV.ATVO.HNE. ML:2.0 0.00013237139 0.64 AML other m 2023-02-09T22:18:52.22
GU.POPM.HHN. ML:1.4 0.00003134009 0.2944 AML other m 2023-02-09T22:18:53.65
GU.POPM.HHE. ML:1.4 0.000023866445 0.256 AML other m 2023-02-09T22:18:56.45
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