Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 12-02-2023 and time 01:07:52 (Italy) in region 1 km S Siena (SI)

A magnitude ML 1.7 earthquake occured in region: 1 km S Siena (SI), on

  • 12-02-2023 00:07:52 (UTC)
  • 12-02-2023 01:07:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3080, 11.3310 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 9 10116 64019
Monteroni d'Arbia SI 11 9088 73107
Monteriggioni SI 13 9810 82917
Castelnuovo Berardenga SI 15 9097 92014
Murlo SI 16 2389 94403
Castellina in Chianti SI 19 2859 97262
Gaiole in Chianti SI 20 2758 100020

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 S 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)
89 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 1.7 2023-02-12
00:07:52		 43.3078 11.3308 8 2024-03-01
17:18:03		 Bollettino Sismico Italiano INGV 116317681
Reviewed
Rev100 		ML 1.7 2023-02-12
00:07:52		 43.323 11.3322 9 2023-02-12
00:16:03		 Sala Sismica INGV-Roma 114361501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-12 00:07:52 ± 0.12
Latitude 43.3078 ± 0.0045
Longitude 11.3308 ± 0.0099
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 116317681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 644
Semi-minor axis of confidence ellipse (meter) 497
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 278
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.0
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 46
Number of defining phases 46
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) 0.16008
Epicentral distance of station farthest from the epicenter (degree) 0.99195
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 114361501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-12 00:16:03

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 116317681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-09-03 23:35:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BOSL.HHE. 2023-02-12T00:08:13.50 0.6 undecidable manual S 3 69.1752 50 -0.63 42
IV.CELB.HHZ. 2023-02-12T00:08:12.59 0.3 undecidable manual P 236 110.112 50 1.28 43
Y1.T1756.HNZ. 2023-02-12T00:08:11.42 0.6 undecidable manual P 36 103.8183 50 1.07 32
IV.FNVD.HHZ. 2023-02-12T00:08:10.25 1.0 undecidable manual P 350 96.8253 50 0.98 17
IV.BDI.HNZ. 2023-02-12T00:08:10.48 0.6 undecidable manual P 325 102.4197 50 0.35 42
IV.RUFI.EHZ. 2023-02-12T00:08:10.90 0.6 undecidable manual S 14 60.495 50 -0.92 38
GU.POPM.HHZ. 2023-02-12T00:08:10.00 0.6 undecidable manual P 331 93.8394 50 1.2 31
GU.MAIM.HHZ. 2023-02-12T00:08:09.07 0.3 undecidable manual P 315 95.1381 50 0.07 69
IV.ATPI.EHZ. 2023-02-12T00:08:08.12 1.0 undecidable manual P 79 87.8454 50 0.24 22
IV.LMD.HHZ. 2023-02-12T00:08:08.32 0.6 undecidable manual P 19 90.5427 50 0.02 47
IV.CAFI.HHZ. 2023-02-12T00:08:08.50 0.6 undecidable manual S 87 51.3153 50 -0.86 39
IV.ATVO.HHZ. 2023-02-12T00:08:08.30 0.3 undecidable manual P 84 87.1461 50 0.52 63
IV.SEI.HHZ. 2023-02-12T00:08:07.70 0.6 undecidable manual P 2 82.8504 50 0.59 41
IV.PARC.HHZ. 2023-02-12T00:08:07.40 0.3 undecidable manual P 62 82.251 50 0.38 66
IV.VMGN.HHN. 2023-02-12T00:08:06.02 0.3 undecidable manual P 13 73.5708 50 0.34 68
IV.PII.HHZ. 2023-02-12T00:08:06.61 0.6 undecidable manual P 306 79.4649 50 0.02 48
IV.ATMI.HHZ. 2023-02-12T00:08:06.31 1.0 undecidable manual P 87 75.6687 50 0.3 23
IV.MGAB.HHZ. 2023-02-12T00:08:06.59 1.0 undecidable manual P 124 76.9674 50 0.38 22
IV.SFI.EHZ. 2023-02-12T00:08:06.80 1.0 undecidable manual P 32 78.1662 50 0.42 22
IV.MPPT.EHZ. 2023-02-12T00:08:06.25 0.3 undecidable manual P 345 74.5698 50 0.41 66
IV.SACS.HHZ. 2023-02-12T00:08:05.54 0.6 undecidable manual P 137 69.1752 50 0.53 43
IV.SSP9.EHZ. 2023-02-12T00:08:05.83 0.3 undecidable manual P 65 70.8735 50 0.56 64
IV.TRIF.CHZ. 2023-02-12T00:08:05.67 0.6 undecidable manual S 238 40.7259 50 -0.85 40
IV.MALA1.EHE. 2023-02-12T00:08:04.57 0.6 undecidable manual S 161 35.742 50 -0.62 45
IV.MALA2.EHE. 2023-02-12T00:08:04.59 0.6 undecidable manual S 160 35.8419 50 -0.62 45
IV.BOSL.HHE. 2023-02-12T00:08:04.88 0.1 undecidable manual P 3 69.1752 50 -0.13 95
IV.MALA4.EHE. 2023-02-12T00:08:04.60 1.0 undecidable manual S 160 35.5422 50 -0.55 23
IV.MALA5.EHE. 2023-02-12T00:08:04.38 0.6 undecidable manual S 160 35.4423 50 -0.73 43
IV.MCIV.CHN. 2023-02-12T00:08:04.56 0.3 undecidable manual P 154 65.0904 50 0.19 71
IV.RUFI.EHZ. 2023-02-12T00:08:03.49 0.3 undecidable manual P 14 60.495 50 -0.18 72
TV.SF11.HHZ. 2023-02-12T00:08:03.22 0.1 undecidable manual P 150 56.2992 50 0.2 96
IV.CRE.HHE. 2023-02-12T00:08:03.92 0.3 undecidable manual P 55 60.7947 50 0.22 71
IV.CRMI.HHZ. 2023-02-12T00:08:03.72 0.1 undecidable manual P 333 60.9945 50 -0.03 98
IV.ARCI.HHE. 2023-02-12T00:08:02.32 0.3 undecidable manual P 167 51.9036 50 -0.02 75
IV.CAFI.HHZ. 2023-02-12T00:08:02.19 0.1 undecidable manual P 87 51.3153 50 -0.06 99
IV.TRIF.CHZ. 2023-02-12T00:08:00.37 0.3 undecidable manual P 238 40.7259 50 -0.25 73
IV.OSSC.HHZ. 2023-02-12T00:08:00.70 1.0 undecidable manual S 344 24.8529 108 -0.94 20
IV.MALA5.EHE. 2023-02-12T00:07:59.67 0.3 undecidable manual P 160 35.4423 50 -0.13 76
IV.FROS.CHZ. 2023-02-12T00:07:59.50 0.3 undecidable manual S 232 17.7711 115 0.15 78
IV.MALA4.EHE. 2023-02-12T00:07:59.71 0.3 undecidable manual P 160 35.5422 50 -0.11 76
IV.MALA1.EHE. 2023-02-12T00:07:59.55 0.3 undecidable manual P 161 35.742 50 -0.3 73
IV.MALA2.EHE. 2023-02-12T00:07:59.67 0.3 undecidable manual P 160 35.8419 50 -0.19 75
IV.CSNT.HHZ. 2023-02-12T00:07:58.70 0.6 undecidable manual S 350 18.6702 114 -0.9 41
IV.OSSC.HHZ. 2023-02-12T00:07:57.28 0.1 undecidable manual P 344 24.8529 108 -0.52 94
IV.FROS.CHZ. 2023-02-12T00:07:56.80 0.1 positive manual P 232 17.7711 115 0.33 100
IV.CSNT.HHZ. 2023-02-12T00:07:56.23 0.1 negative manual P 350 18.6702 114 -0.39 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:2.4 0.0022299999999999998 0.2 AML other m 2023-02-12T00:07:59.73
IV.CSNT.HHN. ML:1.8 0.0005505 0.12 AML other m 2023-02-12T00:08:00.08
IV.FROS.CHN. ML:2.4 0.0023650000000000003 0.2 AML other m 2023-02-12T00:08:00.15
IV.OSSC.HHE. ML:1.8 0.00034399999999999996 1.64 AML other m 2023-02-12T00:08:01.12
IV.CSNT.HHE. ML:1.9 0.0006245000000000001 0.18 AML other m 2023-02-12T00:08:01.86
IV.OSSC.HHN. ML:1.6 0.0002485 0.72 AML other m 2023-02-12T00:08:02.54
IV.TRIF.CHE. ML:2.2 0.0005595 0.76 AML other m 2023-02-12T00:08:06.17
IV.TRIF.CHN. ML:1.9 0.00028500000000000004 0.26 AML other m 2023-02-12T00:08:07.30
IV.CAFI.HHN. ML:1.6 0.00010159999999999999 1.14 AML other m 2023-02-12T00:08:09.12
IV.CAFI.HHE. ML:1.6 0.000095 0.28 AML other m 2023-02-12T00:08:09.57
IV.RUFI.EHE. ML:1.8 0.00013550000000000001 0.9 AML other m 2023-02-12T00:08:11.75
IV.RUFI.EHN. ML:1.7 0.00011035 0.36 AML other m 2023-02-12T00:08:11.94
IV.CRMI.HHE. ML:1.1 0.000024800000000000003 1.02 AML other m 2023-02-12T00:08:12.07
IV.CRMI.HHN. ML:1.4 0.00004295 1.14 AML other m 2023-02-12T00:08:12.16
IV.PII.HHN. ML:2.0 0.000132 0.36 AML other m 2023-02-12T00:08:17.57
IV.SACS.HHN. ML:1.4 0.00003915 0.42 AML other m 2023-02-12T00:08:18.64
IV.SFI.EHE. ML:1.7 0.00006884999999999999 0.56 AML other m 2023-02-12T00:08:19.43
IV.PII.HHE. ML:1.9 0.00010965 0.26 AML other m 2023-02-12T00:08:19.78
IV.SEI.HHN. ML:2.0 0.0001285 1.62 AML other m 2023-02-12T00:08:19.89
IV.SEI.HHE. ML:1.9 0.00010205 0.46 AML other m 2023-02-12T00:08:20.51
IV.SACS.HHE. ML:1.4 0.0000428 0.82 AML other m 2023-02-12T00:08:20.86
IV.SFI.EHN. ML:1.5 0.00005205 1.2 AML other m 2023-02-12T00:08:21.95
IV.MGAB.HHE. ML:1.7 0.0000712 0.9 AML other m 2023-02-12T00:08:22.45
IV.LMD.HHE. ML:1.6 0.0000478 0.32 AML other m 2023-02-12T00:08:22.09
IV.ATVO.HHN. ML:1.5 0.000037900000000000006 0.9 AML other m 2023-02-12T00:08:22.15
IV.MGAB.HHN. ML:1.6 0.000060899999999999996 0.66 AML other m 2023-02-12T00:08:23.22
GU.POPM.HHE. ML:1.4 0.000026500000000000004 0.58 AML other m 2023-02-12T00:08:24.33
IV.LMD.HHN. ML:1.6 0.000042999999999999995 0.7 AML other m 2023-02-12T00:08:24.08
IV.ATPI.EHN. ML:1.6 0.00004675 0.7 AML other m 2023-02-12T00:08:24.10
IV.ATMI.HHE. ML:2.1 0.00017299999999999998 0.28 AML other m 2023-02-12T00:08:24.02
GU.POPM.HHN. ML:1.4 0.0000297 0.16 AML other m 2023-02-12T00:08:24.57
IV.ATPI.EHE. ML:1.5 0.00003735 0.46 AML other m 2023-02-12T00:08:24.93
IV.ATMI.HHN. ML:2.1 0.00017199999999999998 0.38 AML other m 2023-02-12T00:08:25.44
IV.ATVO.HHE. ML:1.5 0.00003985 0.46 AML other m 2023-02-12T00:08:27.35
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