Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 08-02-2023 and time 21:10:11 (UTC) in region 1 km S Siena (SI)

A magnitude ML 2.0 earthquake occured in region: 1 km S Siena (SI), on

  • 08-02-2023 21:10:11 (UTC)
  • 08-02-2023 22:10:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3080, 11.3370 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 1 53903 53903
Sovicille SI 9 10116 64019
Monteroni d'Arbia SI 11 9088 73107
Monteriggioni SI 13 9810 82917
Castelnuovo Berardenga SI 14 9097 92014
Murlo SI 16 2389 94403
Castellina in Chianti SI 19 2859 97262
Gaiole in Chianti SI 20 2758 100020
Asciano SI 20 7118 107138

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km S of Siena (53903 inhabitants)
48 Km W of Arezzo (99543 inhabitants)
52 Km S of Scandicci (50609 inhabitants)
52 Km S of Firenze (382808 inhabitants)
63 Km N of Grosseto (82087 inhabitants)
67 Km SE of Prato (191150 inhabitants)
77 Km SE of Pistoia (90315 inhabitants)
87 Km E of Livorno (159219 inhabitants)
88 Km SE of Pisa (89158 inhabitants)
88 Km W of Perugia (166134 inhabitants)
90 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 2023-02-08
21:10:11		 43.3082 11.3367 9 2024-03-01
17:18:15		 Bollettino Sismico Italiano INGV 120610891
Reviewed
Rev100 		ML 2.0 2023-02-08
21:10:11		 43.3183 11.3307 10 2023-02-08
21:20:33		 Sala Sismica INGV-Roma 114270421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-08 21:10:11 ± 0.11
Latitude 43.3082 ± 0.0036
Longitude 11.3367 ± 0.0087
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 120610891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 459
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
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) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.16458
Epicentral distance of station farthest from the epicenter (degree) 0.85975
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 26
Type of magnitude ML
Reference to an origin 120610891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-30 14:50:10

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 114270421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-08 21:20:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VMGN.HHN. 2023-02-08T21:10:34.16 0.6 undecidable manual S 12 73.371 50 0.33 45
IV.MPPT.EHN. 2023-02-08T21:10:34.22 0.6 undecidable manual S 345 74.6697 50 0.04 48
IV.CASP.HHE. 2023-02-08T21:10:33.58 0.6 undecidable manual S 214 68.9754 50 0.93 37
IV.BOSL.HHE. 2023-02-08T21:10:32.46 0.3 undecidable manual S 2 69.1752 50 -0.23 70
IV.CRMI.HNN. 2023-02-08T21:10:30.12 0.6 undecidable manual S 332 61.1943 50 -0.46 45
IV.RUFI.EHE. 2023-02-08T21:10:29.79 0.6 undecidable manual S 13 60.3951 50 -0.57 44
IV.ARCI.HHZ. 2023-02-08T21:10:28.58 0.6 undecidable manual S 167 51.8037 50 0.5 45
TV.SF11.HHZ. 2023-02-08T21:10:28.30 0.6 undecidable manual S 150 56.0994 50 -0.92 38
GU.MAIM.HHZ. 2023-02-08T21:10:27.94 0.3 undecidable manual P 315 95.4378 50 0.24 66
IV.CAFI.HHZ. 2023-02-08T21:10:26.86 0.6 undecidable manual S 87 50.9157 50 -0.96 38
IV.ATMI.HHZ. 2023-02-08T21:10:25.28 0.3 undecidable manual P 87 75.1692 50 0.7 60
IV.SFI.EHZ. 2023-02-08T21:10:25.48 0.1 undecidable manual P 32 77.8665 50 0.5 87
IV.PARC.HHZ. 2023-02-08T21:10:25.88 0.3 undecidable manual P 62 81.8514 50 0.29 67
IV.MGAB.HHZ. 2023-02-08T21:10:24.71 0.3 undecidable manual P 125 76.5678 50 -0.08 71
IV.ATMC.EHE. 2023-02-08T21:10:24.43 0.3 undecidable manual P 77 70.6737 50 0.55 65
IV.MPPT.EHN. 2023-02-08T21:10:24.71 0.3 undecidable manual P 345 74.6697 50 0.21 69
IV.SSP9.EHZ. 2023-02-08T21:10:24.51 0.3 undecidable manual P 65 70.4739 50 0.66 62
IV.CASP.HHE. 2023-02-08T21:10:24.43 0.3 undecidable manual P 214 68.9754 50 0.82 58
IV.VMGN.HHN. 2023-02-08T21:10:24.65 0.3 undecidable manual P 12 73.371 50 0.35 68
IV.TRIF.CHZ. 2023-02-08T21:10:24.44 0.6 undecidable manual S 239 41.1255 50 -0.78 41
IV.MALA1.EHZ. 2023-02-08T21:10:23.04 0.6 undecidable manual S 161 35.6421 50 -0.71 43
IV.MCIV.CHZ. 2023-02-08T21:10:23.04 0.3 undecidable manual P 155 64.8906 50 0.05 73
IV.BOSL.HHE. 2023-02-08T21:10:23.67 0.3 undecidable manual P 2 69.1752 50 0.03 73
IV.SACS.HHE. 2023-02-08T21:10:23.89 0.3 undecidable manual P 137 68.8755 50 0.28 69
IV.MALA0.EHZ. 2023-02-08T21:10:23.10 0.6 undecidable manual S 162 35.3424 50 -0.57 46
IV.RUFI.EHE. 2023-02-08T21:10:22.38 0.3 undecidable manual P 13 60.3951 50 0.09 73
IV.MALA4.EHZ. 2023-02-08T21:10:22.91 0.6 undecidable manual S 161 35.4423 50 -0.8 42
IV.CRE.HHZ. 2023-02-08T21:10:22.80 0.6 undecidable manual P 55 60.2952 50 0.51 44
IV.CRMI.HNN. 2023-02-08T21:10:22.49 0.3 undecidable manual P 332 61.1943 50 0.07 73
TV.SF11.HHZ. 2023-02-08T21:10:21.72 0.1 undecidable manual P 150 56.0994 50 0.09 98
IV.CAFI.HHZ. 2023-02-08T21:10:20.76 0.3 undecidable manual P 87 50.9157 50 -0.07 75
IV.ARCI.HHZ. 2023-02-08T21:10:20.88 0.3 undecidable manual P 167 51.8037 50 -0.09 74
IV.TRIF.CHZ. 2023-02-08T21:10:19.37 0.3 undecidable manual P 239 41.1255 50 0.04 77
IV.OSSC.HHZ. 2023-02-08T21:10:19.98 0.6 undecidable manual S 343 24.9528 109 -0.49 48
IV.MALA0.EHZ. 2023-02-08T21:10:18.23 0.1 undecidable manual P 162 35.3424 50 -0.2 100
IV.FROS.CHZ. 2023-02-08T21:10:18.55 0.6 undecidable manual S 233 18.2706 116 0.25 51
IV.MALA1.EHZ. 2023-02-08T21:10:18.11 0.3 undecidable manual P 161 35.6421 50 -0.37 72
IV.MALA4.EHZ. 2023-02-08T21:10:18.15 0.1 undecidable manual P 161 35.4423 50 -0.3 98
IV.CSNT.HHZ. 2023-02-08T21:10:17.79 0.6 undecidable manual S 348 18.6702 115 -0.65 46
IV.OSSC.HHZ. 2023-02-08T21:10:16.21 0.1 undecidable manual P 343 24.9528 109 -0.37 98
IV.CSNT.HHZ. 2023-02-08T21:10:15.08 0.1 undecidable manual P 348 18.6702 115 -0.33 100
IV.FROS.CHZ. 2023-02-08T21:10:15.68 0.1 positive manual P 233 18.2706 116 0.35 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.1 0.00109360545 0.1408 AML other m 2023-02-08T21:10:18.05
IV.CSNT.HHE. ML:2.2 0.00127761485 0.2816 AML other m 2023-02-08T21:10:18.21
IV.FROS.CHE. ML:2.4 0.002025 0.18 AML other m 2023-02-08T21:10:18.75
IV.FROS.CHN. ML:2.2 0.0012023305500000001 0.2432 AML other m 2023-02-08T21:10:19.66
IV.OSSC.HHN. ML:2.2 0.0008649440500000001 0.1792 AML other m 2023-02-08T21:10:20.24
IV.OSSC.HHE. ML:2.3 0.001339 0.28 AML other m 2023-02-08T21:10:20.29
IV.TRIF.CHN. ML:1.9 0.000286 0.16 AML other m 2023-02-08T21:10:25.74
IV.TRIF.CHE. ML:2.2 0.0004965000000000001 0.2 AML other m 2023-02-08T21:10:25.74
IV.CAFI.HNE. ML:1.9 0.00022157245 1.7568 AML other m 2023-02-08T21:10:27.07
IV.CAFI.HHE. ML:1.9 0.000222 1.76 AML other m 2023-02-08T21:10:27.07
IV.CAFI.HNN. ML:2.0 0.00023367795000000003 0.2048 AML other m 2023-02-08T21:10:28.17
IV.CAFI.HHN. ML:2.0 0.00024017184999999998 0.2176 AML other m 2023-02-08T21:10:28.17
IV.ARCI.HHE. ML:2.2 0.00038754225 0.1664 AML other m 2023-02-08T21:10:30.14
IV.ARCI.HNE. ML:2.2 0.00037499265000000005 0.1792 AML other m 2023-02-08T21:10:30.14
IV.ARCI.HHN. ML:2.1 0.00029070935 0.1792 AML other m 2023-02-08T21:10:30.20
IV.ARCI.HNN. ML:2.0 0.0002727926 0.192 AML other m 2023-02-08T21:10:30.20
IV.CRE.HHN. ML:1.9 0.00014833135 0.3584 AML other m 2023-02-08T21:10:32.25
IV.CRE.HHE. ML:1.8 0.0001383433 0.2816 AML other m 2023-02-08T21:10:34.53
IV.MGAB.HNE. ML:2.1 0.00020035341499999998 0.7936 AML other m 2023-02-08T21:10:34.55
IV.MCIV.CHE. ML:1.8 0.00011995 1.28 AML other m 2023-02-08T21:10:34.24
IV.MCIV.CHN. ML:1.6 0.00007983763499999998 1.7056 AML other m 2023-02-08T21:10:35.02
IV.MGAB.HHN. ML:1.7 0.00008106867000000001 0.3968 AML other m 2023-02-08T21:10:40.60
IV.MGAB.HHE. ML:1.6 0.00006222757499999999 0.2432 AML other m 2023-02-08T21:10:42.45
IV.SFI.HNE. ML:1.9 0.00010895947 1.1936 AML other m 2023-02-08T21:10:44.08
IV.MGAB.HNN. ML:2.1 0.00017192865000000002 0.9088 AML other m 2023-02-08T21:10:44.56
IV.SFI.HNN. ML:2.1 0.00016322575 0.6656 AML other m 2023-02-08T21:10:56.57
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