Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 08-02-2023 and time 22:55:35 (Italy) in region 1 km W Siena (SI)

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

  • 08-02-2023 21:55:35 (UTC)
  • 08-02-2023 22:55:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3210, 11.3180 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.

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 1 53903 53903
Sovicille SI 8 10116 64019
Monteriggioni SI 11 9810 73829
Monteroni d'Arbia SI 13 9088 82917
Castelnuovo Berardenga SI 15 9097 92014
Castellina in Chianti SI 17 2859 94873
Murlo SI 18 2389 97262
Gaiole in Chianti SI 19 2758 100020
Radda in Chianti SI 19 1613 101633
Colle di Val d'Elsa SI 20 21620 123253

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km W of Siena (53903 inhabitants)
49 Km W of Arezzo (99543 inhabitants)
50 Km S of Scandicci (50609 inhabitants)
50 Km S of Firenze (382808 inhabitants)
64 Km N of Grosseto (82087 inhabitants)
65 Km S of Prato (191150 inhabitants)
75 Km SE of Pistoia (90315 inhabitants)
85 Km E of Livorno (159219 inhabitants)
86 Km SE of Pisa (89158 inhabitants)
88 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
21:55:35		 43.3213 11.3177 9 2024-03-01
17:18:15		 Bollettino Sismico Italiano INGV 120605821
Reviewed
Rev100 		ML 2.4 2023-02-08
21:55:35		 43.3282 11.3087 8 2023-02-08
22:13:01		 Sala Sismica INGV-Roma 114272911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-08 21:55:35 ± 0.12
Latitude 43.3213 ± 0.0045
Longitude 11.3177 ± 0.0099
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 120605821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 719
Semi-minor axis of confidence ellipse (meter) 460
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 720.0
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 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.15288
Epicentral distance of station farthest from the epicenter (degree) 0.99195
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:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 120605821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-30 13:18:03

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 114272911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-08 22:13:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPPT.EHN. 2023-02-08T21:55:58.07 0.6 undecidable manual S 346 72.8715 50 -0.07 47
IV.BOSL.HHZ. 2023-02-08T21:55:56.46 0.6 undecidable manual S 4 67.7766 50 -0.31 45
IV.CELB.HHZ. 2023-02-08T21:55:55.62 0.3 undecidable manual P 235 110.112 50 1.23 43
IV.CRE.HHZ. 2023-02-08T21:55:55.12 0.6 undecidable manual S 57 60.7947 50 0.21 47
IV.RUFI.EHZ. 2023-02-08T21:55:53.97 0.6 undecidable manual S 15 59.3961 50 -0.55 43
IV.CRMI.HNN. 2023-02-08T21:55:53.70 0.6 undecidable manual S 333 59.1963 50 -0.79 39
TV.SF11.HHZ. 2023-02-08T21:55:52.77 0.6 undecidable manual S 150 58.0974 50 -1.42 29
IV.ARCI.HHZ. 2023-02-08T21:55:52.78 0.6 undecidable manual S 166 53.6019 50 -0.21 47
GU.MAIM.HHZ. 2023-02-08T21:55:52.03 0.3 undecidable manual P 315 93.3399 50 0.23 65
IV.MGAB.HHZ. 2023-02-08T21:55:51.12 0.3 undecidable manual P 125 78.6657 50 1.57 38
IV.FIR.HNE. 2023-02-08T21:55:51.82 0.6 undecidable manual S 354 50.5161 50 -0.34 46
IV.CAFI.HHZ. 2023-02-08T21:55:51.51 0.6 undecidable manual S 89 52.3032 50 -1.15 34
IV.LMD.HHZ. 2023-02-08T21:55:51.44 0.3 undecidable manual P 20 89.5437 50 0.23 66
IV.ATMI.HHZ. 2023-02-08T21:55:50.14 0.6 undecidable manual P 89 76.6677 50 0.9 36
IV.PARC.HHZ. 2023-02-08T21:55:50.48 0.3 undecidable manual P 64 82.5507 50 0.34 65
IV.SEI.HHZ. 2023-02-08T21:55:50.64 0.6 undecidable manual P 2 81.3519 50 0.68 39
IV.SFI.EHZ. 2023-02-08T21:55:49.85 0.3 undecidable manual P 33 77.4669 50 0.5 64
IV.MPPT.EHN. 2023-02-08T21:55:49.10 0.3 undecidable manual P 346 72.8715 50 0.45 65
IV.PII.HHZ. 2023-02-08T21:55:49.57 0.3 undecidable manual P 305 77.7666 50 0.18 68
IV.CASP.HHZ. 2023-02-08T21:55:48.72 0.3 undecidable manual P 212 69.375 50 0.62 62
IV.TRIF.CHZ. 2023-02-08T21:55:48.97 0.3 undecidable manual S 236 40.626 50 -0.56 67
IV.SACS.HHE. 2023-02-08T21:55:48.62 0.3 undecidable manual P 137 71.0733 50 0.25 68
IV.VMGN.HHN. 2023-02-08T21:55:48.99 0.3 undecidable manual P 14 72.372 50 0.43 65
IV.BOSL.HHZ. 2023-02-08T21:55:48.03 0.3 undecidable manual P 4 67.7766 50 0.17 70
IV.MCIV.CHE. 2023-02-08T21:55:47.75 0.3 undecidable manual P 154 66.8775 50 0.03 72
IV.CRE.HHZ. 2023-02-08T21:55:47.50 0.3 undecidable manual P 57 60.7947 50 0.72 60
IV.MALA1.EHN. 2023-02-08T21:55:47.60 0.6 undecidable manual S 160 37.5291 50 -1.09 36
IV.MALA4.EHZ. 2023-02-08T21:55:47.62 0.6 undecidable manual S 160 37.3293 50 -1.03 37
TV.SF11.HHZ. 2023-02-08T21:55:46.34 0.1 undecidable manual P 150 58.0974 50 -0.03 97
IV.RUFI.EHZ. 2023-02-08T21:55:46.62 0.3 undecidable manual P 15 59.3961 50 0.05 72
IV.CRMI.HNN. 2023-02-08T21:55:46.85 0.3 undecidable manual P 333 59.1963 50 0.31 69
IV.CAFI.HHZ. 2023-02-08T21:55:45.38 0.3 undecidable manual P 89 52.3032 50 -0.1 73
IV.ARCI.HHZ. 2023-02-08T21:55:45.61 0.3 undecidable manual P 166 53.6019 50 -0.07 73
IV.FIR.HNE. 2023-02-08T21:55:44.89 0.6 undecidable manual P 354 50.5161 50 -0.31 47
IV.OSSC.HHZ. 2023-02-08T21:55:43.76 0.3 undecidable manual S 346 23.1546 110 -0.51 70
IV.TRIF.CHZ. 2023-02-08T21:55:43.71 0.3 undecidable manual P 236 40.626 50 0.03 75
IV.MALA1.EHN. 2023-02-08T21:55:42.76 0.3 undecidable manual P 160 37.5291 50 -0.44 69
IV.MALA4.EHZ. 2023-02-08T21:55:42.80 0.3 undecidable manual P 160 37.3293 50 -0.37 70
IV.FROS.CHZ. 2023-02-08T21:55:42.66 0.3 undecidable manual S 227 17.9709 116 0.04 78
IV.CSNT.HHZ. 2023-02-08T21:55:41.63 0.3 undecidable manual S 352 16.9719 117 -0.67 66
IV.OSSC.HHZ. 2023-02-08T21:55:40.37 0.1 undecidable manual P 346 23.1546 110 -0.28 98
IV.FROS.CHZ. 2023-02-08T21:55:39.93 0.1 positive manual P 227 17.9709 116 0.24 100
IV.CSNT.HHZ. 2023-02-08T21:55:39.26 0.1 undecidable manual P 352 16.9719 117 -0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.5 0.002674625 1.8592 AML other m 2023-02-08T21:55:42.97
IV.CSNT.HHE. ML:2.5 0.0029089835 0.1152 AML other m 2023-02-08T21:55:42.15
IV.FROS.CHE. ML:2.8 0.006099067999999999 0.1408 AML other m 2023-02-08T21:55:42.83
IV.OSSC.HHN. ML:2.6 0.0023453489999999996 0.1792 AML other m 2023-02-08T21:55:44.13
IV.OSSC.HHE. ML:2.8 0.004169670500000001 0.1792 AML other m 2023-02-08T21:55:44.19
IV.FROS.CHN. ML:2.8 0.0060372195000000005 0.2688 AML other m 2023-02-08T21:55:44.69
IV.TRIF.CHE. ML:2.6 0.001545 0.22 AML other m 2023-02-08T21:55:49.56
IV.TRIF.CHN. ML:2.6 0.0012535875 0.128 AML other m 2023-02-08T21:55:49.89
IV.CAFI.HHN. ML:2.2 0.00042449999999999996 0.26 AML other m 2023-02-08T21:55:52.20
IV.CAFI.HNN. ML:2.2 0.00041762224999999996 0.2688 AML other m 2023-02-08T21:55:52.20
IV.CAFI.HHE. ML:2.2 0.00038518039999999997 0.3584 AML other m 2023-02-08T21:55:52.44
IV.CAFI.HNE. ML:2.2 0.00037924570000000003 0.4096 AML other m 2023-02-08T21:55:52.66
IV.ARCI.HNN. ML:2.3 0.0005277920499999999 0.3712 AML other m 2023-02-08T21:55:53.75
IV.ARCI.HHN. ML:2.4 0.0005599893 0.3328 AML other m 2023-02-08T21:55:54.87
IV.RUFI.EHN. ML:2.2 0.00032571665 1.68 AML other m 2023-02-08T21:55:54.86
IV.LMD.HHN. ML:2.1 0.00013598375 1.5392 AML other m 2023-02-08T21:55:54.93
IV.RUFI.EHE. ML:2.2 0.00037153175 0.2304 AML other m 2023-02-08T21:55:54.84
IV.ARCI.HNE. ML:2.4 0.0005903837000000001 0.3328 AML other m 2023-02-08T21:55:55.17
IV.ARCI.HHE. ML:2.4 0.00061097605 0.3328 AML other m 2023-02-08T21:55:55.17
IV.CRE.HHN. ML:2.4 0.00050267535 0.3072 AML other m 2023-02-08T21:55:56.63
IV.SFI.HNN. ML:2.2 0.0002177968 1.0656 AML other m 2023-02-08T21:55:57.20
IV.BOSL.HHE. ML:2.3 0.0003480821 0.3328 AML other m 2023-02-08T21:55:57.63
IV.BOSL.HHN. ML:2.1 0.000237 1.56 AML other m 2023-02-08T21:55:58.90
IV.CASP.HHN. ML:2.6 0.000739 0.3 AML other m 2023-02-08T21:55:59.56
IV.CASP.HNN. ML:2.7 0.0008380000000000001 0.38 AML other m 2023-02-08T21:55:59.57
IV.CASP.HNE. ML:2.5 0.00052348885 0.384 AML other m 2023-02-08T21:55:59.96
IV.CASP.HHE. ML:2.5 0.000529 0.36 AML other m 2023-02-08T21:55:59.95
IV.CRE.HHE. ML:2.3 0.00043620715 1.6672 AML other m 2023-02-08T21:55:59.04
IV.PII.HHN. ML:2.4 0.0003315725 0.2304 AML other m 2023-02-08T21:56:00.31
IV.PII.HHE. ML:2.4 0.00039994815 0.2688 AML other m 2023-02-08T21:56:00.81
IV.SFI.HNE. ML:2.2 0.00022304785 1.488 AML other m 2023-02-08T21:56:01.93
IV.SEI.HHE. ML:2.6 0.0005244141499999999 0.512 AML other m 2023-02-08T21:56:02.96
IV.SFI.EHN. ML:2.0 0.00013682520000000002 1.3728 AML other m 2023-02-08T21:56:02.19
IV.SEI.HHN. ML:2.9 0.00104530545 0.4608 AML other m 2023-02-08T21:56:02.94
IV.PARC.HHE. ML:2.3 0.00025038545 0.6784 AML other m 2023-02-08T21:56:03.14
IV.PARC.HHN. ML:2.2 0.00020996245 0.2944 AML other m 2023-02-08T21:56:04.56
IV.SFI.EHE. ML:2.2 0.00022818939999999998 1.3344 AML other m 2023-02-08T21:56:05.83
IV.LMD.HHE. ML:2.2 0.00017864655000000002 0.3584 AML other m 2023-02-08T21:56:05.36
IV.ATMI.HHN. ML:2.6 0.0005726787 0.5888 AML other m 2023-02-08T21:56:05.74
IV.ATMI.HHE. ML:2.6 0.00064775515 0.448 AML other m 2023-02-08T21:56:10.41
GU.MAIM.HHN. ML:1.9 0.00008265168 0.6272 AML other m 2023-02-08T21:56:11.60
IV.CELB.HHN. ML:2.1 0.00011254030999999998 0.4224 AML other m 2023-02-08T21:56:17.76
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