Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 12-02-2023 and time 04:58:27 (Italy) in region Siena (SI)

A magnitude ML 1.3 earthquake occured in region: Siena (SI), on

  • 12-02-2023 03:58:27 (UTC)
  • 12-02-2023 04:58:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3170, 11.3320 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 0 53903 53903
Sovicille SI 9 10116 64019
Monteroni d'Arbia SI 12 9088 73107
Monteriggioni SI 13 9810 82917
Castelnuovo Berardenga SI 14 9097 92014
Murlo SI 17 2389 94403
Castellina in Chianti SI 18 2859 97262
Gaiole in Chianti SI 19 2758 100020
Radda in Chianti SI 19 1613 101633

Municipalities with at least 50000 inhabitants

An earthquake occurred to
0 Km SW 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)
66 Km S of Prato (191150 inhabitants)
76 Km SE of Pistoia (90315 inhabitants)
87 Km E of Livorno (159219 inhabitants)
87 Km SE of Pisa (89158 inhabitants)
89 Km W of Perugia (166134 inhabitants)
89 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 1.3 2023-02-12
03:58:27		 43.317 11.3315 8 2024-03-01
17:18:04		 Bollettino Sismico Italiano INGV 116492871
Reviewed
Rev100 		ML 1.4 2023-02-12
03:58:27		 43.3095 11.3367 7 2023-02-12
04:07:54		 Sala Sismica INGV-Roma 114366031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-12 03:58:27 ± 0.12
Latitude 43.3170 ± 0.0054
Longitude 11.3315 ± 0.0111
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 116492871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 873
Semi-minor axis of confidence ellipse (meter) 595
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 298
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.15918
Epicentral distance of station farthest from the epicenter (degree) 0.99735
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 114366031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-12 04:07:54

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 116492871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-09-04 00:01:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELB.HHZ. 2023-02-12T03:59:00.80 0.6 undecidable manual S 236 110.7003 50 0.19 41
IV.CASP.HHZ. 2023-02-12T03:58:49.10 0.6 undecidable manual S 213 69.5748 50 -0.51 42
IV.CELB.HHZ. 2023-02-12T03:58:48.21 0.1 undecidable manual P 236 110.7003 50 1.43 50
IV.CRE.HHZ. 2023-02-12T03:58:47.60 1.0 undecidable manual S 56 60.0954 50 0.5 21
IV.RUFI.EHE. 2023-02-12T03:58:46.29 0.6 undecidable manual S 14 59.496 50 -0.65 40
IV.ARCI.HNE. 2023-02-12T03:58:45.00 0.6 undecidable manual S 167 52.9026 50 -0.17 47
IV.CAFI.HHZ. 2023-02-12T03:58:43.90 1.0 undecidable manual S 88 51.2154 50 -0.83 19
IV.SSP9.EHZ. 2023-02-12T03:58:41.24 0.3 undecidable manual P 66 70.4739 50 0.68 59
IV.SACS.HHE. 2023-02-12T03:58:41.00 0.6 undecidable manual P 138 69.8745 50 0.52 42
IV.TRIF.CHZ. 2023-02-12T03:58:41.30 1.0 undecidable manual S 237 41.3253 50 -0.77 20
IV.MGAB.HHZ. 2023-02-12T03:58:41.77 0.3 undecidable manual P 125 77.4669 50 0.12 67
IV.CASP.HHZ. 2023-02-12T03:58:41.08 0.1 undecidable manual P 213 69.5748 50 0.65 79
IV.MALA4.EHE. 2023-02-12T03:58:39.90 0.6 undecidable manual S 161 36.5412 50 -0.89 38
IV.CRMI.HNN. 2023-02-12T03:58:39.17 0.6 undecidable manual P 332 60.1953 50 0.19 46
IV.MALA0.EHE. 2023-02-12T03:58:39.85 0.6 undecidable manual S 162 36.3414 50 -0.91 38
IV.CRE.HHZ. 2023-02-12T03:58:39.82 0.1 undecidable manual P 56 60.0954 50 0.85 74
IV.MALA5.EHE. 2023-02-12T03:58:39.90 0.6 undecidable manual S 161 36.3414 50 -0.86 39
IV.RUFI.EHE. 2023-02-12T03:58:38.90 0.3 undecidable manual P 14 59.496 50 0.01 71
TV.SF11.HHZ. 2023-02-12T03:58:38.62 0.3 undecidable manual P 150 57.0984 50 0.1 70
IV.CAFI.HHZ. 2023-02-12T03:58:37.67 0.1 undecidable manual P 88 51.2154 50 0.06 95
IV.ARCI.HNE. 2023-02-12T03:58:37.76 0.1 undecidable manual P 167 52.9026 50 -0.1 94
IV.OSSC.HHZ. 2023-02-12T03:58:36.02 0.6 undecidable manual S 343 23.9538 108 -0.6 44
IV.MALA5.EHE. 2023-02-12T03:58:35.52 0.3 undecidable manual P 161 36.3414 50 0.2 71
IV.TRIF.CHZ. 2023-02-12T03:58:35.85 0.3 undecidable manual P 237 41.3253 50 -0.22 70
IV.MALA0.EHE. 2023-02-12T03:58:35.08 0.1 undecidable manual P 162 36.3414 50 -0.24 94
IV.MALA1.EHN. 2023-02-12T03:58:35.14 0.6 undecidable manual P 161 36.6411 50 -0.22 47
IV.MALA4.EHE. 2023-02-12T03:58:35.39 0.3 undecidable manual P 161 36.5412 50 0.05 74
IV.MALA2.EHN. 2023-02-12T03:58:35.31 0.3 undecidable manual P 161 36.741 50 -0.06 73
IV.FROS.CHZ. 2023-02-12T03:58:34.80 0.3 undecidable manual S 230 18.4704 113 -0.05 76
IV.CSNT.HHZ. 2023-02-12T03:58:34.20 0.3 undecidable manual S 349 17.6712 114 -0.38 71
IV.FROS.CHZ. 2023-02-12T03:58:32.20 0.1 undecidable manual P 230 18.4704 113 0.29 96
IV.OSSC.HHZ. 2023-02-12T03:58:32.68 0.1 undecidable manual P 343 23.9538 108 -0.25 96
IV.CSNT.HHZ. 2023-02-12T03:58:31.63 0.1 undecidable manual P 349 17.6712 114 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.9 0.0006095 0.2 AML other m 2023-02-12T03:58:35.13
IV.CSNT.HHN. ML:1.2 0.000129 0.12 AML other m 2023-02-12T03:58:35.49
IV.FROS.CHN. ML:1.9 0.0006810000000000001 0.18 AML other m 2023-02-12T03:58:35.56
IV.CSNT.HHE. ML:1.3 0.0001635 0.18 AML other m 2023-02-12T03:58:37.27
IV.TRIF.CHE. ML:1.7 0.0001625 0.76 AML other m 2023-02-12T03:58:41.57
IV.TRIF.CHN. ML:1.4 0.00007725 0.84 AML other m 2023-02-12T03:58:42.57
IV.CAFI.HHN. ML:1.0 0.000024411405 0.3808 AML other m 2023-02-12T03:58:44.53
IV.CAFI.HHE. ML:1.0 0.00002596896 0.2816 AML other m 2023-02-12T03:58:44.98
IV.CRE.HHN. ML:1.3 0.0000415 0.7 AML other m 2023-02-12T03:58:50.54
IV.CASP.HHN. ML:1.4 0.000038150000000000006 0.68 AML other m 2023-02-12T03:58:51.33
IV.CASP.HHE. ML:1.2 0.0000227 1.04 AML other m 2023-02-12T03:58:52.90
IV.CRE.HHE. ML:1.2 0.0000324 0.58 AML other m 2023-02-12T03:58:53.36
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