Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 10-02-2023 and time 22:38:33 (Italy) in region Siena (SI)

A magnitude ML 1.4 earthquake occured in region: Siena (SI), on

  • 10-02-2023 21:38:33 (UTC)
  • 10-02-2023 22:38:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3220, 11.3340 at 10 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 10 10116 64019
Monteriggioni SI 12 9810 73829
Monteroni d'Arbia SI 12 9088 82917
Castelnuovo Berardenga SI 14 9097 92014
Castellina in Chianti SI 17 2859 94873
Murlo SI 18 2389 97262
Gaiole in Chianti SI 18 2758 100020
Radda in Chianti SI 19 1613 101633

Municipalities with at least 50000 inhabitants

An earthquake occurred to
0 Km N of Siena (53903 inhabitants)
47 Km W of Arezzo (99543 inhabitants)
50 Km S of Scandicci (50609 inhabitants)
50 Km S of Firenze (382808 inhabitants)
65 Km N of Grosseto (82087 inhabitants)
65 Km SE 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 SE of Lucca (89046 inhabitants)
89 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 1.4 2023-02-10
21:38:33		 43.3222 11.3337 10 2024-03-01
17:18:15		 Bollettino Sismico Italiano INGV 120433591
Reviewed
Rev100 		ML 1.4 2023-02-10
21:38:33		 43.3288 11.3212 11 2023-02-10
21:44:54		 Sala Sismica INGV-Roma 114329431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-10 21:38:33 ± 0.12
Latitude 43.3222 ± 0.0081
Longitude 11.3337 ± 0.0148
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 120433591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1275
Semi-minor axis of confidence ellipse (meter) 756
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.15378
Epicentral distance of station farthest from the epicenter (degree) 0.63132
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 120433591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-08-24 08:42:35

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 114329431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-10 21:44:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
TV.SF11.HHZ. 2023-02-10T21:38:51.28 0.6 undecidable manual S 151 57.5979 50 -0.8 38
IV.CAFI.HHZ. 2023-02-10T21:38:49.81 0.3 undecidable manual S 89 51.1155 50 -0.54 64
IV.CASP.HHZ. 2023-02-10T21:38:47.41 0.3 undecidable manual P 213 70.0743 50 1.04 50
IV.TRIF.CHZ. 2023-02-10T21:38:47.55 0.6 undecidable manual S 237 41.7249 50 -0.32 46
IV.MALA2.EHE. 2023-02-10T21:38:46.15 0.3 undecidable manual S 162 37.2294 50 -0.51 66
IV.MCIV.CHE. 2023-02-10T21:38:46.16 0.3 undecidable manual P 155 66.378 50 0.36 65
IV.MALA0.EHE. 2023-02-10T21:38:46.13 0.3 undecidable manual S 162 36.8298 50 -0.43 67
IV.MALA1.EHE. 2023-02-10T21:38:46.23 0.3 undecidable manual S 162 37.1295 50 -0.41 67
IV.MALA4.EHE. 2023-02-10T21:38:46.16 0.3 undecidable manual S 162 37.0296 50 -0.44 67
IV.CRE.HHE. 2023-02-10T21:38:46.04 0.3 undecidable manual P 56 59.6958 50 1.28 45
TV.SF11.HHZ. 2023-02-10T21:38:44.80 0.1 undecidable manual P 151 57.5979 50 0.36 88
IV.CAFI.HHZ. 2023-02-10T21:38:44.00 0.3 undecidable manual P 89 51.1155 50 0.56 63
IV.ARCI.HHZ. 2023-02-10T21:38:43.93 0.3 undecidable manual P 168 53.4021 50 0.13 69
IV.TRIF.CHZ. 2023-02-10T21:38:42.02 0.3 undecidable manual P 237 41.7249 50 0.03 72
IV.OSSC.HHZ. 2023-02-10T21:38:42.47 0.3 undecidable manual S 342 23.4543 113 -0.34 70
IV.MALA1.EHE. 2023-02-10T21:38:41.47 0.3 undecidable manual P 162 37.1295 50 0.18 71
IV.MALA4.EHE. 2023-02-10T21:38:41.44 0.3 undecidable manual P 162 37.0296 50 0.17 71
IV.FROS.CHZ. 2023-02-10T21:38:41.28 0.3 undecidable manual S 229 18.9699 117 -0.12 74
IV.MALA2.EHE. 2023-02-10T21:38:41.47 0.1 undecidable manual P 162 37.2294 50 0.17 95
IV.MALA0.EHE. 2023-02-10T21:38:41.42 0.3 undecidable manual P 162 36.8298 50 0.17 71
IV.CSNT.HHZ. 2023-02-10T21:38:40.40 0.3 undecidable manual S 348 17.0718 120 -0.43 69
IV.OSSC.HHZ. 2023-02-10T21:38:38.91 0.1 undecidable manual P 342 23.4543 113 -0.17 97
IV.FROS.CHZ. 2023-02-10T21:38:38.46 0.1 undecidable manual P 229 18.9699 117 0.19 97
IV.CSNT.HHZ. 2023-02-10T21:38:37.87 0.1 undecidable manual P 348 17.0718 120 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:1.6 0.00034950000000000004 0.14 AML other m 2023-02-10T21:38:40.62
IV.CSNT.HHE. ML:1.5 0.00027100000000000003 0.3 AML other m 2023-02-10T21:38:40.71
IV.FROS.CHE. ML:1.7 0.0004145 0.52 AML other m 2023-02-10T21:38:41.41
IV.FROS.CHN. ML:1.7 0.0004185 0.12 AML other m 2023-02-10T21:38:41.83
IV.OSSC.HHE. ML:1.6 0.0002415 0.22 AML other m 2023-02-10T21:38:42.81
IV.OSSC.HHN. ML:1.5 0.000191 0.16 AML other m 2023-02-10T21:38:43.01
IV.CAFI.HNN. ML:1.1 0.000037392590000000004 0.2176 AML other m 2023-02-10T21:38:50.53
IV.CAFI.HHE. ML:1.2 0.00003835 1.66 AML other m 2023-02-10T21:38:50.09
IV.CAFI.HNE. ML:1.2 0.000042186445 1.6672 AML other m 2023-02-10T21:38:50.10
IV.CAFI.HHN. ML:1.1 0.000035199999999999995 1.14 AML other m 2023-02-10T21:38:51.59
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