Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 08-02-2023 and time 23:55:41 (Italy) in region 1 km W Siena (SI)

A magnitude ML 2.1 earthquake occured in region: 1 km W Siena (SI), on

  • 08-02-2023 22:55:41 (UTC)
  • 08-02-2023 23:55:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3160, 11.3220 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
Monteriggioni SI 12 9810 73829
Monteroni d'Arbia SI 13 9088 82917
Castelnuovo Berardenga SI 15 9097 92014
Murlo SI 17 2389 94403
Castellina in Chianti SI 17 2859 97262
Gaiole in Chianti SI 19 2758 100020
Radda in Chianti SI 20 1613 101633

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km W of Siena (53903 inhabitants)
48 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)
65 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)
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 2.1 2023-02-08
22:55:41		 43.3163 11.3215 8 2024-03-01
17:18:15		 Bollettino Sismico Italiano INGV 120582641
Reviewed
Rev100 		ML 2.1 2023-02-08
22:55:41		 43.3238 11.3225 7 2023-02-08
23:08:44		 Sala Sismica INGV-Roma 114274421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-08 22:55:41 ± 0.1
Latitude 43.3163 ± 0.0036
Longitude 11.3215 ± 0.0087
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 120582641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 546
Semi-minor axis of confidence ellipse (meter) 435
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) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
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) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.15828
Epicentral distance of station farthest from the epicenter (degree) 0.99105
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 114274421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-08 23:08:44

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 120582641
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-29 10:19:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.MAIM.HHZ. 2023-02-08T22:56:08.52 0.6 undecidable manual S 315 93.9393 50 -0.93 34
IV.SEI.HHZ. 2023-02-08T22:56:07.04 0.6 undecidable manual S 2 81.9513 50 0.8 37
IV.VMGN.HHN. 2023-02-08T22:56:04.28 0.6 undecidable manual S 13 72.7716 50 0.47 42
IV.MPPT.EHN. 2023-02-08T22:56:03.66 0.6 undecidable manual S 345 73.4709 50 -0.34 44
IV.BOSL.HHE. 2023-02-08T22:56:02.31 0.3 undecidable manual S 4 68.2761 50 -0.3 67
IV.CELB.HHZ. 2023-02-08T22:56:01.00 0.3 undecidable manual P 235 110.0121 50 0.98 48
IV.BDI.HHZ. 2023-02-08T22:55:59.12 0.6 undecidable manual P 325 101.2209 50 0.46 40
IV.RUFI.EHZ. 2023-02-08T22:55:59.68 0.6 undecidable manual S 15 59.7957 50 -0.66 41
IV.MURB.HHZ. 2023-02-08T22:55:58.66 0.3 undecidable manual P 93 97.3248 50 0.6 58
IV.LMD.HHZ. 2023-02-08T22:55:57.03 0.3 undecidable manual P 20 89.9433 50 0.12 66
GU.POPM.HHZ. 2023-02-08T22:55:57.82 0.3 undecidable manual P 331 92.6406 50 0.48 61
IV.CAFI.HHZ. 2023-02-08T22:55:57.16 0.3 undecidable manual S 88 52.1034 50 -1.12 50
GU.MAIM.HHZ. 2023-02-08T22:55:57.50 0.3 undecidable manual P 315 93.9393 50 -0.04 67
IV.SEI.HHZ. 2023-02-08T22:55:56.22 0.3 undecidable manual P 2 81.9513 50 0.54 61
IV.PII.HHZ. 2023-02-08T22:55:55.02 0.3 undecidable manual P 305 78.2661 50 -0.1 68
IV.PARC.HHZ. 2023-02-08T22:55:55.98 0.3 undecidable manual P 63 82.5507 50 0.2 66
IV.MGAB.HHZ. 2023-02-08T22:55:55.35 0.3 undecidable manual P 125 78.1662 50 0.25 66
IV.SFI.EHZ. 2023-02-08T22:55:55.34 0.3 undecidable manual P 33 77.7666 50 0.31 65
IV.SSP9.EHZ. 2023-02-08T22:55:54.47 0.3 undecidable manual P 66 71.1732 50 0.44 64
IV.ATMC.EHE. 2023-02-08T22:55:54.15 0.3 undecidable manual P 78 71.7726 50 0.04 70
IV.TRIF.CHZ. 2023-02-08T22:55:54.61 0.3 undecidable manual S 237 40.5261 50 -0.6 65
IV.SACS.HHZ. 2023-02-08T22:55:54.11 0.3 undecidable manual P 137 70.374 50 0.2 68
IV.MPPT.EHN. 2023-02-08T22:55:54.70 0.3 undecidable manual P 345 73.4709 50 0.32 66
IV.VMGN.HHN. 2023-02-08T22:55:54.64 0.1 undecidable manual P 13 72.7716 50 0.36 87
IV.CASP.HHZ. 2023-02-08T22:55:54.36 0.3 undecidable manual P 213 69.0753 50 0.66 60
IV.BOSL.HHE. 2023-02-08T22:55:53.52 0.3 undecidable manual P 4 68.2761 50 -0.06 70
IV.MCIV.CHE. 2023-02-08T22:55:53.28 0.3 undecidable manual P 154 66.1893 50 0.02 71
IV.MALA1.EHN. 2023-02-08T22:55:53.23 0.6 undecidable manual S 160 36.8298 50 -0.99 37
IV.MALA4.EHZ. 2023-02-08T22:55:53.20 0.6 undecidable manual S 160 36.741 50 -0.97 37
IV.RUFI.EHZ. 2023-02-08T22:55:52.29 0.3 undecidable manual P 15 59.7957 50 0.01 72
IV.CRE.HHZ. 2023-02-08T22:55:52.85 0.3 undecidable manual P 56 60.7947 50 0.42 66
IV.ARCI.HHZ. 2023-02-08T22:55:51.27 0.3 undecidable manual P 166 53.0025 50 0.05 72
TV.SF11.HHZ. 2023-02-08T22:55:51.89 0.1 undecidable manual P 150 57.498 50 -0.03 96
IV.CAFI.HHZ. 2023-02-08T22:55:50.91 0.3 undecidable manual P 88 52.1034 50 -0.17 70
IV.OSSC.HHZ. 2023-02-08T22:55:49.47 0.3 undecidable manual S 345 23.754 109 -0.51 69
IV.TRIF.CHZ. 2023-02-08T22:55:49.16 0.3 undecidable manual P 237 40.5261 50 -0.16 72
IV.FROS.CHZ. 2023-02-08T22:55:48.14 0.3 undecidable manual S 229 17.871 114 0.09 76
IV.MALA1.EHN. 2023-02-08T22:55:48.32 0.3 undecidable manual P 160 36.8298 50 -0.42 69
IV.MALA4.EHZ. 2023-02-08T22:55:48.41 0.3 undecidable manual P 160 36.741 50 -0.31 70
IV.CSNT.HHZ. 2023-02-08T22:55:47.42 0.3 undecidable manual S 352 17.5713 115 -0.55 68
IV.OSSC.HHZ. 2023-02-08T22:55:46.00 0.1 undecidable manual P 345 23.754 109 -0.29 96
IV.FROS.CHZ. 2023-02-08T22:55:45.49 0.1 undecidable manual P 229 17.871 114 0.31 97
IV.CSNT.HHZ. 2023-02-08T22:55:44.97 0.1 undecidable manual P 352 17.5713 115 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.4 0.0023155405 0.1536 AML other m 2023-02-08T22:55:47.67
IV.CSNT.HHE. ML:2.3 0.0017848228499999998 0.1408 AML other m 2023-02-08T22:55:47.85
IV.FROS.CHE. ML:2.8 0.00529 0.16 AML other m 2023-02-08T22:55:48.52
IV.OSSC.HHN. ML:2.4 0.0015757711 0.192 AML other m 2023-02-08T22:55:49.83
IV.OSSC.HHE. ML:2.7 0.003235 0.18 AML other m 2023-02-08T22:55:49.88
IV.FROS.CHN. ML:2.8 0.00497 0.24 AML other m 2023-02-08T22:55:50.37
IV.TRIF.CHN. ML:2.3 0.00078940855 0.1408 AML other m 2023-02-08T22:55:55.65
IV.TRIF.CHE. ML:2.5 0.0010615 0.2 AML other m 2023-02-08T22:55:56.13
IV.CAFI.HHE. ML:2.1 0.0003005 0.32 AML other m 2023-02-08T22:55:58.24
IV.CAFI.HNE. ML:2.1 0.00028951055 0.32 AML other m 2023-02-08T22:55:58.25
IV.CAFI.HHN. ML:2.1 0.00028771900000000003 0.2816 AML other m 2023-02-08T22:55:58.71
IV.CAFI.HNN. ML:2.0 0.00026378045 0.2688 AML other m 2023-02-08T22:55:58.71
IV.ARCI.HHN. ML:2.1 0.00029841735000000005 0.3328 AML other m 2023-02-08T22:56:00.50
IV.ARCI.HNN. ML:2.1 0.0002987529 0.3328 AML other m 2023-02-08T22:56:00.51
IV.RUFI.EHN. ML:2.1 0.00027639539999999995 0.3072 AML other m 2023-02-08T22:56:00.53
IV.ARCI.HHE. ML:2.1 0.00033319605000000003 0.384 AML other m 2023-02-08T22:56:00.78
IV.ARCI.HNE. ML:2.2 0.00034661085000000004 0.3968 AML other m 2023-02-08T22:56:00.79
IV.RUFI.EHE. ML:2.2 0.00032411115 0.256 AML other m 2023-02-08T22:56:00.49
IV.CRE.HHE. ML:2.2 0.000311 0.52 AML other m 2023-02-08T22:56:04.05
IV.CASP.HHN. ML:2.4 0.00046699999999999997 0.3 AML other m 2023-02-08T22:56:05.22
IV.CASP.HHE. ML:2.4 0.0003808106 0.3712 AML other m 2023-02-08T22:56:05.61
IV.CRE.HHN. ML:2.2 0.0003235 0.3 AML other m 2023-02-08T22:56:06.07
IV.SSP9.EHN. ML:2.2 0.00023683685 0.4224 AML other m 2023-02-08T22:56:07.04
IV.SFI.EHE. ML:2.2 0.0002135 1.4 AML other m 2023-02-08T22:56:08.16
IV.SFI.HNE. ML:2.2 0.00023418675 1.4112 AML other m 2023-02-08T22:56:08.16
IV.SFI.EHN. ML:1.9 0.00010992311 0.6144 AML other m 2023-02-08T22:56:08.83
IV.PARC.HHN. ML:2.1 0.00015900000000000002 0.68 AML other m 2023-02-08T22:56:08.72
IV.SACS.HNE. ML:2.0 0.0001867975 1.3216 AML other m 2023-02-08T22:56:08.77
IV.PARC.HHE. ML:2.0 0.00014740695000000002 1.3088 AML other m 2023-02-08T22:56:09.13
IV.SACS.HHE. ML:1.8 0.00010336027 0.8576 AML other m 2023-02-08T22:56:09.54
IV.LMD.HHE. ML:2.1 0.0001376 0.34 AML other m 2023-02-08T22:56:11.04
GU.POPM.HHE. ML:2.0 0.00011683095 0.2304 AML other m 2023-02-08T22:56:11.70
IV.SACS.HHN. ML:1.7 0.00008929541 1.4368 AML other m 2023-02-08T22:56:11.27
GU.POPM.HHN. ML:2.0 0.00010483661 1.7696 AML other m 2023-02-08T22:56:13.03
IV.BDI.HNN. ML:2.3 0.0001998626 0.6016 AML other m 2023-02-08T22:56:15.29
IV.SACS.HNN. ML:1.9 0.000134580005 0.7168 AML other m 2023-02-08T22:56:15.94
IV.LMD.HHN. ML:1.9 0.00009554658 0.7168 AML other m 2023-02-08T22:56:16.38
IV.SSP9.EHE. ML:2.1 0.00019442199999999998 0.6016 AML other m 2023-02-08T22:56:17.18
IV.BDI.HHE. ML:1.8 0.00006049758 0.32 AML other m 2023-02-08T22:56:18.63
IV.CELB.HHE. ML:1.9 0.00006934099000000001 0.1536 AML other m 2023-02-08T22:56:18.60
IV.BDI.HHN. ML:1.9 0.000087056995 0.3968 AML other m 2023-02-08T22:56:19.07
IV.BDI.HNE. ML:2.1 0.00011648565 0.7424 AML other m 2023-02-08T22:56:29.61
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