Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 08-02-2023 and time 22:12:41 (UTC) in region 1 km SW Siena (SI)

A magnitude ML 2.4 earthquake occured in region: 1 km SW Siena (SI), on

  • 08-02-2023 22:12:41 (UTC)
  • 08-02-2023 23:12:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3130, 11.3210 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 1 53903 53903
Sovicille SI 8 10116 64019
Monteroni d'Arbia SI 12 9088 73107
Monteriggioni SI 12 9810 82917
Castelnuovo Berardenga SI 15 9097 92014
Murlo SI 17 2389 94403
Castellina in Chianti SI 18 2859 97262
Gaiole in Chianti SI 20 2758 100020
Radda in Chianti SI 20 1613 101633

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km SW of Siena (53903 inhabitants)
49 Km W of Arezzo (99543 inhabitants)
51 Km S of Scandicci (50609 inhabitants)
51 Km S of Firenze (382808 inhabitants)
64 Km N of Grosseto (82087 inhabitants)
66 Km S of Prato (191150 inhabitants)
76 Km SE of Pistoia (90315 inhabitants)
86 Km E of Livorno (159219 inhabitants)
87 Km SE of Pisa (89158 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
90 Km W of Perugia (166134 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 2.4 2023-02-08
22:12:41		 43.3128 11.3213 9 2024-03-01
17:18:15		 Bollettino Sismico Italiano INGV 120583851
Reviewed
Rev100 		ML 2.4 2023-02-08
22:12:41		 43.3228 11.3143 9 2023-02-08
22:34:43		 Sala Sismica INGV-Roma 114273611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-08 22:12:41 ± 0.1
Latitude 43.3128 ± 0.0036
Longitude 11.3213 ± 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 120583851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 500
Semi-minor axis of confidence ellipse (meter) 454
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
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 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.15828
Epicentral distance of station farthest from the epicenter (degree) 0.84896
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:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 114273611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-08 22:34:43

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 120583851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-29 10:47:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2023-02-08T22:13:05.48 0.6 undecidable manual S 306 78.4659 50 -0.36 44
IV.CASP.HHZ. 2023-02-08T22:13:03.35 0.6 undecidable manual S 213 68.6757 50 0.14 46
IV.BOSL.HHZ. 2023-02-08T22:13:02.69 0.3 undecidable manual S 4 68.6757 50 -0.53 64
IV.CRE.HHZ. 2023-02-08T22:13:01.38 0.6 undecidable manual S 56 61.0944 50 0.21 46
IV.RUFI.EHZ. 2023-02-08T22:13:00.28 0.6 undecidable manual S 14 60.1953 50 -0.66 41
TV.SF11.HHZ. 2023-02-08T22:12:59.04 0.6 undecidable manual S 149 57.1983 50 -1.1 34
GU.POPM.HHZ. 2023-02-08T22:12:58.61 0.3 undecidable manual P 331 93.0402 50 0.68 57
GU.MAIM.HHZ. 2023-02-08T22:12:58.30 0.3 undecidable manual P 315 94.239 50 0.18 66
IV.CAFI.HHZ. 2023-02-08T22:12:57.75 0.3 undecidable manual S 88 52.1034 50 -1.03 53
IV.LMD.HHZ. 2023-02-08T22:12:57.72 0.3 undecidable manual P 20 90.243 50 0.2 66
IV.SEI.HHZ. 2023-02-08T22:12:56.90 0.3 undecidable manual P 2 82.251 50 0.62 60
IV.SFI.EHZ. 2023-02-08T22:12:56.05 0.3 undecidable manual P 33 78.0663 50 0.42 65
IV.PARC.HHZ. 2023-02-08T22:12:56.78 0.3 undecidable manual P 63 82.6506 50 0.44 64
IV.BADI.EHZ. 2023-02-08T22:12:56.07 0.3 undecidable manual P 73 77.5668 50 0.52 63
IV.PII.HHZ. 2023-02-08T22:12:55.76 0.3 undecidable manual P 306 78.4659 50 0.06 69
IV.MPPT.EHN. 2023-02-08T22:12:55.26 0.3 undecidable manual P 346 73.8705 50 0.27 67
IV.ATMI.HHZ. 2023-02-08T22:12:55.98 0.3 undecidable manual P 88 76.4679 50 0.6 61
IV.MGAB.HHZ. 2023-02-08T22:12:55.89 0.3 undecidable manual P 124 77.9664 50 0.28 66
IV.SSP9.EHZ. 2023-02-08T22:12:55.12 0.3 undecidable manual P 66 71.373 50 0.52 64
IV.TRIF.CHZ. 2023-02-08T22:12:55.27 0.6 undecidable manual S 237 40.3263 50 -0.38 47
IV.VMGN.HHN. 2023-02-08T22:12:55.27 0.3 undecidable manual P 13 73.1712 50 0.4 65
IV.ATMC.EHE. 2023-02-08T22:12:54.91 0.3 undecidable manual P 78 71.7726 50 0.24 68
IV.CASP.HHZ. 2023-02-08T22:12:54.93 0.3 undecidable manual P 213 68.6757 50 0.74 59
IV.BOSL.HHZ. 2023-02-08T22:12:54.25 0.3 undecidable manual P 4 68.6757 50 0.06 71
IV.SACS.HHZ. 2023-02-08T22:12:54.77 0.3 undecidable manual P 137 70.1742 50 0.37 66
IV.MALA0.EHN. 2023-02-08T22:12:53.65 0.6 undecidable manual S 160 36.2415 50 -0.9 39
IV.MALA1.EHN. 2023-02-08T22:12:53.88 0.6 undecidable manual S 160 36.5412 50 -0.74 41
IV.CRE.HHZ. 2023-02-08T22:12:53.39 0.3 undecidable manual P 56 61.0944 50 0.38 67
IV.MALA4.EHZ. 2023-02-08T22:12:53.89 0.6 undecidable manual S 160 36.3414 50 -0.69 42
IV.MCIV.CHZ. 2023-02-08T22:12:53.84 0.1 undecidable manual P 154 65.8896 50 0.09 94
IV.CRMI.HNN. 2023-02-08T22:12:52.84 0.3 undecidable manual P 333 60.1953 50 -0.03 72
IV.RUFI.EHZ. 2023-02-08T22:12:52.85 0.1 undecidable manual P 14 60.1953 50 -0.02 97
TV.SF11.HHZ. 2023-02-08T22:12:52.46 0.1 undecidable manual P 149 57.1983 50 0.05 97
IV.CAFI.HHZ. 2023-02-08T22:12:51.48 0.1 undecidable manual P 88 52.1034 50 -0.15 96
IV.ARCI.HHZ. 2023-02-08T22:12:51.68 0.1 undecidable manual P 166 52.6029 50 -0.03 98
IV.OSSC.HHZ. 2023-02-08T22:12:50.05 0.3 undecidable manual S 345 24.1536 109 -0.69 65
IV.MALA4.EHZ. 2023-02-08T22:12:49.04 0.1 undecidable manual P 160 36.3414 50 -0.16 98
IV.TRIF.CHZ. 2023-02-08T22:12:49.74 0.1 undecidable manual P 237 40.3263 50 -0.08 99
IV.MALA0.EHN. 2023-02-08T22:12:49.01 0.1 undecidable manual P 160 36.2415 50 -0.17 98
IV.MALA1.EHN. 2023-02-08T22:12:49.02 0.3 undecidable manual P 160 36.5412 50 -0.2 73
IV.CSNT.HHZ. 2023-02-08T22:12:48.10 0.3 undecidable manual S 352 17.9709 115 -0.64 67
IV.FROS.CHZ. 2023-02-08T22:12:48.74 0.3 undecidable manual S 229 17.5713 116 0.12 77
IV.OSSC.HHZ. 2023-02-08T22:12:46.57 0.1 undecidable manual P 345 24.1536 109 -0.41 95
IV.FROS.CHZ. 2023-02-08T22:12:46.16 0.1 undecidable manual P 229 17.5713 116 0.39 96
IV.CSNT.HHZ. 2023-02-08T22:12:45.61 0.1 undecidable manual P 352 17.9709 115 -0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:2.6 0.00343 0.3 AML other m 2023-02-08T22:12:48.44
IV.CSNT.HHN. ML:2.7 0.003865 0.36 AML other m 2023-02-08T22:12:48.29
IV.FROS.CHE. ML:2.8 0.00632 1.52 AML other m 2023-02-08T22:12:50.81
IV.OSSC.HHN. ML:2.6 0.002705 0.68 AML other m 2023-02-08T22:12:50.82
IV.OSSC.HHE. ML:2.9 0.00455 0.74 AML other m 2023-02-08T22:12:50.53
IV.FROS.CHN. ML:2.9 0.0069500000000000004 1.7 AML other m 2023-02-08T22:12:51.01
IV.TRIF.CHE. ML:2.6 0.001545 1.22 AML other m 2023-02-08T22:12:56.73
IV.TRIF.CHN. ML:2.5 0.00103 1.04 AML other m 2023-02-08T22:12:57.77
IV.CAFI.HHN. ML:2.3 0.000489 0.48 AML other m 2023-02-08T22:12:58.41
IV.CAFI.HHE. ML:2.2 0.0003815 0.34 AML other m 2023-02-08T22:12:58.85
IV.RUFI.EHE. ML:2.4 0.0005525 1.34 AML other m 2023-02-08T22:13:00.14
IV.ARCI.HHE. ML:2.4 0.0005949999999999999 0.8 AML other m 2023-02-08T22:13:01.00
IV.RUFI.EHN. ML:2.3 0.0003685 0.32 AML other m 2023-02-08T22:13:01.34
IV.ARCI.HHN. ML:2.4 0.0005495 0.56 AML other m 2023-02-08T22:13:01.11
IV.BOSL.HHE. ML:2.3 0.0003595 1.56 AML other m 2023-02-08T22:13:03.17
IV.BOSL.HHN. ML:2.1 0.00022050000000000002 0.54 AML other m 2023-02-08T22:13:03.32
IV.MCIV.CHN. ML:2.0 0.0001835 1.7 AML other m 2023-02-08T22:13:05.91
IV.CASP.HHN. ML:2.5 0.0006154999999999999 0.32 AML other m 2023-02-08T22:13:05.83
IV.CASP.HHE. ML:2.4 0.00047599999999999997 1.14 AML other m 2023-02-08T22:13:05.25
IV.CASP.HNE. ML:2.5 0.000641 1.28 AML other m 2023-02-08T22:13:06.05
IV.CASP.HNN. ML:2.6 0.0006845 1.56 AML other m 2023-02-08T22:13:06.07
IV.MCIV.CHE. ML:2.0 0.0001725 1.52 AML other m 2023-02-08T22:13:06.15
IV.SSP9.EHN. ML:2.2 0.00029049999999999996 0.92 AML other m 2023-02-08T22:13:08.00
IV.BADI.EHE. ML:2.2 0.000255 1.66 AML other m 2023-02-08T22:13:08.92
IV.SEI.HHE. ML:2.5 0.00044950000000000003 0.26 AML other m 2023-02-08T22:13:09.16
IV.SEI.HHN. ML:2.8 0.000877 0.48 AML other m 2023-02-08T22:13:09.27
IV.MGAB.HHE. ML:2.2 0.0002335 0.86 AML other m 2023-02-08T22:13:09.82
IV.PARC.HHE. ML:2.2 0.000219 0.62 AML other m 2023-02-08T22:13:09.78
IV.PARC.HHN. ML:2.2 0.0002255 0.9 AML other m 2023-02-08T22:13:10.81
IV.MGAB.HHN. ML:2.2 0.0002465 0.88 AML other m 2023-02-08T22:13:11.80
IV.ATMI.HHN. ML:2.6 0.000597 0.4 AML other m 2023-02-08T22:13:11.99
IV.ATMI.HHE. ML:2.7 0.0007135 0.32 AML other m 2023-02-08T22:13:13.35
IV.ATPI.EHN. ML:2.2 0.00020750000000000003 0.56 AML other m 2023-02-08T22:13:13.75
IV.MURB.HHE. ML:2.7 0.00047149999999999997 0.9 AML other m 2023-02-08T22:13:14.78
GU.POPM.HHE. ML:2.2 0.0001615 0.76 AML other m 2023-02-08T22:13:14.38
IV.MURB.HHN. ML:2.6 0.0004335 0.5 AML other m 2023-02-08T22:13:14.56
IV.ATPI.EHE. ML:2.1 0.000154 0.66 AML other m 2023-02-08T22:13:15.48
GU.POPM.HHN. ML:2.2 0.00017099999999999998 0.94 AML other m 2023-02-08T22:13:15.66
IV.SSP9.EHE. ML:2.3 0.00029749999999999997 1.42 AML other m 2023-02-08T22:13:17.11
IV.BADI.EHN. ML:2.1 0.000175 0.96 AML other m 2023-02-08T22:13:21.15
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