Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 09-02-2023 and time 08:16:06 (UTC) in region 3 km E Siena (SI)

A magnitude ML 2.1 earthquake occured in region: 3 km E Siena (SI), on

  • 09-02-2023 08:16:06 (UTC)
  • 09-02-2023 09:16:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3110, 11.3680 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 12 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 19 2758 104279
Castellina in Chianti SI 19 2859 107138
Rapolano Terme SI 19 5249 112387
Radda in Chianti SI 20 1613 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)
52 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)
90 Km E of Livorno (159219 inhabitants)
90 Km SE of Pisa (89158 inhabitants)
92 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 2.1 2023-02-09
08:16:06		 43.3108 11.3677 9 2024-03-01
17:17:57		 Bollettino Sismico Italiano INGV 115068401
Reviewed
Rev100 		ML 2.0 2023-02-09
08:16:06		 43.3132 11.3743 8 2023-02-09
08:23:46		 Sala Sismica INGV-Roma 114286231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 08:16:06 ± 0.11
Latitude 43.3108 ± 0.0045
Longitude 11.3677 ± 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 115068401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 713
Semi-minor axis of confidence ellipse (meter) 459
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) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 41
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.76442
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 27
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 114286231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 08:23:46

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 115068401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-09-19 09:16:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSSA.HHZ. 2023-02-09T08:17:04.14 3.0 undecidable manual Sg 3.34 0
IV.MMO1.EHZ. 2023-02-09T08:16:58.88 3.0 undecidable manual S 3.72 0
IV.BOSL.HHZ. 2023-02-09T08:16:27.51 0.6 undecidable manual S 0 68.7756 50 -0.43 45
IV.RUFI.EHZ. 2023-02-09T08:16:25.26 0.6 undecidable manual S 11 59.5959 50 -0.22 48
IV.CRE.HHZ. 2023-02-09T08:16:25.33 0.6 undecidable manual S 54 58.0974 50 0.24 48
TV.SF11.HHZ. 2023-02-09T08:16:23.38 1.0 undecidable manual S 153 55.2003 50 -0.92 19
IV.ARCI.HHZ. 2023-02-09T08:16:23.73 1.0 undecidable manual S 170 51.7038 50 0.36 24
IV.ATPI.EHZ. 2023-02-09T08:16:22.37 0.6 undecidable manual P 79 84.8484 50 0.99 35
IV.PII.HHZ. 2023-02-09T08:16:21.27 0.6 undecidable manual P 304 81.6516 50 0.37 44
IV.CAFI.HHZ. 2023-02-09T08:16:21.58 0.6 undecidable manual S 87 48.3183 50 -0.9 39
IV.SEI.HHZ. 2023-02-09T08:16:21.83 0.6 undecidable manual P 359 82.4508 50 0.82 38
IV.PARC.HHZ. 2023-02-09T08:16:20.92 0.3 undecidable manual P 62 79.4649 50 0.37 67
IV.ATMI.HHZ. 2023-02-09T08:16:20.52 0.6 undecidable manual P 88 72.6717 50 1.01 35
IV.SFI.EHZ. 2023-02-09T08:16:20.52 0.3 undecidable manual P 30 76.2681 50 0.46 66
IV.BADI.EHE. 2023-02-09T08:16:20.00 1.0 undecidable manual P 72 73.9704 50 0.29 23
IV.MGAB.HHZ. 2023-02-09T08:16:20.09 0.6 undecidable manual P 126 74.7696 50 0.27 46
IV.TRIF.CHZ. 2023-02-09T08:16:20.98 0.6 undecidable manual S 240 43.4232 50 -0.19 50
IV.SACS.HHZ. 2023-02-09T08:16:19.12 0.6 undecidable manual P 139 67.4769 50 0.41 45
IV.CASP.HHZ. 2023-02-09T08:16:19.55 0.6 undecidable manual P 215 70.6737 50 0.36 45
IV.BOSL.HHZ. 2023-02-09T08:16:19.09 1.0 undecidable manual P 0 68.7756 50 0.18 24
IV.MALA1.EHZ. 2023-02-09T08:16:18.35 0.3 undecidable manual S 165 35.2425 50 -0.62 67
IV.ATMC.EHE. 2023-02-09T08:16:18.76 1.0 undecidable manual P 77 68.1762 50 -0.06 24
IV.MALA0.EHZ. 2023-02-09T08:16:18.36 0.3 undecidable manual S 166 34.9428 50 -0.54 70
IV.MALA5.EHZ. 2023-02-09T08:16:18.36 0.3 undecidable manual S 165 34.8429 50 -0.53 70
IV.MALA4.EHZ. 2023-02-09T08:16:18.34 0.3 undecidable manual S 165 35.0427 50 -0.59 68
IV.MCIV.CHE. 2023-02-09T08:16:18.34 0.3 undecidable manual P 157 64.0914 50 0.15 72
IV.CRMI.HNN. 2023-02-09T08:16:18.13 0.3 undecidable manual P 330 62.1933 50 0.25 71
IV.RUFI.EHZ. 2023-02-09T08:16:17.52 0.6 undecidable manual P 11 59.5959 50 0.03 50
IV.CRE.HHZ. 2023-02-09T08:16:17.69 0.6 undecidable manual P 54 58.0974 50 0.43 46
TV.SF11.HHZ. 2023-02-09T08:16:16.96 0.3 undecidable manual P 153 55.2003 50 0.15 73
IV.ARCI.HHZ. 2023-02-09T08:16:16.45 0.3 undecidable manual P 170 51.7038 50 0.18 73
IV.TRIF.CHZ. 2023-02-09T08:16:15.41 0.3 undecidable manual P 240 43.4232 50 0.41 71
IV.CAFI.HHZ. 2023-02-09T08:16:15.73 0.3 undecidable manual P 87 48.3183 50 -0.03 76
IV.OSSC.HHZ. 2023-02-09T08:16:15.29 0.3 undecidable manual S 337 25.5522 109 -0.63 68
IV.FROS.CHZ. 2023-02-09T08:16:14.58 0.3 undecidable manual S 237 20.4684 113 0.32 75
IV.CSNT.HHZ. 2023-02-09T08:16:13.17 0.3 undecidable manual S 341 19.0698 114 -0.64 69
IV.MALA1.EHZ. 2023-02-09T08:16:13.60 0.3 undecidable manual P 165 35.2425 50 -0.13 76
IV.MALA0.EHZ. 2023-02-09T08:16:13.59 0.3 undecidable manual P 166 34.9428 50 -0.1 77
IV.MALA5.EHZ. 2023-02-09T08:16:13.81 0.6 undecidable manual P 165 34.8429 50 0.13 51
IV.MALA4.EHZ. 2023-02-09T08:16:13.69 0.6 undecidable manual P 165 35.0427 50 -0.01 52
IV.FROS.CHZ. 2023-02-09T08:16:11.35 0.1 positive manual P 237 20.4684 113 0.34 100
IV.OSSC.HHZ. 2023-02-09T08:16:11.62 0.3 undecidable manual P 337 25.5522 109 -0.35 74
IV.CSNT.HHZ. 2023-02-09T08:16:10.40 0.1 undecidable manual P 341 19.0698 114 -0.35 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.6 0.0035600000000000002 0.3 AML other m 2023-02-09T08:16:13.56
IV.CSNT.HHE. ML:2.8 0.005015 0.26 AML other m 2023-02-09T08:16:13.43
IV.FROS.CHN. ML:2.8 0.004345000000000001 0.16 AML other m 2023-02-09T08:16:15.19
IV.FROS.CHE. ML:2.4 0.0019416009999999998 0.1408 AML other m 2023-02-09T08:16:15.19
IV.OSSC.HHE. ML:2.3 0.0011092705999999999 0.1856 AML other m 2023-02-09T08:16:15.71
IV.OSSC.HHN. ML:2.4 0.0013250000000000002 1.66 AML other m 2023-02-09T08:16:15.00
IV.TRIF.CHN. ML:2.2 0.00047396545 0.1344 AML other m 2023-02-09T08:16:21.62
IV.TRIF.CHE. ML:2.2 0.0005061875 0.1664 AML other m 2023-02-09T08:16:22.06
IV.CAFI.HNN. ML:2.0 0.0002875 1.58 AML other m 2023-02-09T08:16:23.80
IV.CAFI.HHN. ML:2.0 0.00029099999999999997 1.58 AML other m 2023-02-09T08:16:23.80
IV.ARCI.HHE. ML:2.2 0.0004148794 0.1408 AML other m 2023-02-09T08:16:24.74
IV.ARCI.HNE. ML:2.2 0.00038900125 0.1472 AML other m 2023-02-09T08:16:24.74
IV.ARCI.HHN. ML:2.4 0.00063132935 0.4032 AML other m 2023-02-09T08:16:24.97
IV.ARCI.HNN. ML:2.4 0.00061515385 0.3904 AML other m 2023-02-09T08:16:24.97
IV.CAFI.HHE. ML:1.9 0.000215 0.32 AML other m 2023-02-09T08:16:25.16
IV.RUFI.EHE. ML:2.0 0.0002166112 0.6016 AML other m 2023-02-09T08:16:25.63
IV.CAFI.HNE. ML:1.9 0.00022000000000000003 0.34 AML other m 2023-02-09T08:16:25.16
IV.RUFI.EHN. ML:1.9 0.0001725 1.22 AML other m 2023-02-09T08:16:25.62
IV.CRE.HHE. ML:2.1 0.00028585689999999995 0.4224 AML other m 2023-02-09T08:16:25.87
IV.BOSL.HHN. ML:1.6 0.00006927761000000001 0.2816 AML other m 2023-02-09T08:16:28.66
IV.BOSL.HHE. ML:2.1 0.000206 0.42 AML other m 2023-02-09T08:16:28.37
IV.CRE.HHN. ML:2.1 0.0002825033 0.3008 AML other m 2023-02-09T08:16:29.55
IV.SACS.HHN. ML:1.8 0.00011129265499999999 0.256 AML other m 2023-02-09T08:16:30.59
IV.SACS.HNN. ML:1.8 0.0001253945 0.2752 AML other m 2023-02-09T08:16:30.59
IV.CASP.HHN. ML:2.3 0.0003195 0.56 AML other m 2023-02-09T08:16:31.22
IV.CASP.HHE. ML:2.1 0.00022549999999999998 0.26 AML other m 2023-02-09T08:16:31.29
IV.SACS.HHE. ML:1.8 0.0000976 0.2 AML other m 2023-02-09T08:16:31.42
IV.PARC.HHN. ML:1.8 0.000096473745 0.2752 AML other m 2023-02-09T08:16:31.77
IV.SFI.HNE. ML:2.1 0.0001711646 0.8512 AML other m 2023-02-09T08:16:34.60
IV.ATPI.EHN. ML:1.9 0.00010594382999999999 0.48 AML other m 2023-02-09T08:16:34.76
IV.MGAB.HHE. ML:1.8 0.00009048469 0.1984 AML other m 2023-02-09T08:16:34.84
IV.ATMI.HHE. ML:2.5 0.000486 1.64 AML other m 2023-02-09T08:16:34.10
IV.SFI.EHE. ML:1.8 0.000096734125 0.9216 AML other m 2023-02-09T08:16:34.60
IV.MGAB.HHN. ML:1.9 0.000131887 0.384 AML other m 2023-02-09T08:16:36.23
IV.ATMI.HHN. ML:2.4 0.00036350000000000005 0.4 AML other m 2023-02-09T08:16:36.54
IV.PARC.HHE. ML:1.8 0.00007829577 0.5184 AML other m 2023-02-09T08:16:37.37
IV.SFI.EHN. ML:1.7 0.000072485735 0.6016 AML other m 2023-02-09T08:16:37.90
IV.ATPI.EHE. ML:1.8 0.000079198215 0.544 AML other m 2023-02-09T08:16:38.00
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