Earthquake with magnitude of ML 1.9 on date 09-02-2023 and time 10:29:21 (UTC) in region 1 km SW Siena (SI)

A magnitude ML 1.9 earthquake occured in region: 1 km SW Siena (SI), on

  • 09-02-2023 10:29:21 (UTC)
  • 09-02-2023 11:29:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3160, 11.3270 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.

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 12 9088 73107
Monteriggioni SI 12 9810 82917
Castelnuovo Berardenga SI 15 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
1 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)
86 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 1.9 2023-02-09
10:29:21
43.3163 11.327 9 2024-03-01
17:17:59
Bollettino Sismico Italiano INGV 115624651
Reviewed
Rev100
ML 2.0 2023-02-09
10:29:21
43.311 11.3387 9 2023-02-09
10:42:53
Sala Sismica INGV-Roma 114291631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 10:29:21 ± 0.11
Latitude 43.3163 ± 0.0045
Longitude 11.3270 ± 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 115624651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 663
Semi-minor axis of confidence ellipse (meter) 494
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 293
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
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 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.15918
Epicentral distance of station farthest from the epicenter (degree) 0.74014
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 115624651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-10-20 14:21:12

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 114291631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 10:42:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SACS.HHE. 2023-02-09T10:29:44.00 0.6 undecidable manual S 137 70.0743 50 0.78 39
IV.ATMC.EHE. 2023-02-09T10:29:43.99 0.3 undecidable manual S 78 71.2731 50 0.45 65
IV.CASP.HHZ. 2023-02-09T10:29:43.14 0.6 undecidable manual S 213 69.2751 50 0.14 47
IV.RUFI.EHZ. 2023-02-09T10:29:40.28 0.6 undecidable manual S 14 59.6958 50 -0.17 47
IV.CRE.HHZ. 2023-02-09T10:29:40.84 0.6 undecidable manual S 56 60.495 50 0.19 47
IV.CRMI.HNN. 2023-02-09T10:29:40.36 0.3 undecidable manual S 332 60.0954 50 -0.18 71
IV.ARCI.HHZ. 2023-02-09T10:29:39.28 0.6 undecidable manual S 167 52.9026 50 0.65 42
TV.SF11.HHZ. 2023-02-09T10:29:38.44 0.3 undecidable manual S 150 57.2982 50 -1.35 45
IV.CAFI.HHE. 2023-02-09T10:29:37.70 0.6 undecidable manual S 88 51.6039 50 -0.59 43
IV.PARC.HHZ. 2023-02-09T10:29:36.45 0.3 undecidable manual P 63 82.1511 50 0.49 63
IV.MGAB.HHZ. 2023-02-09T10:29:35.88 0.6 undecidable manual P 125 77.7666 50 0.59 41
IV.TRIF.CHZ. 2023-02-09T10:29:35.12 0.3 undecidable manual S 237 40.9257 50 -0.32 71
IV.SACS.HHE. 2023-02-09T10:29:34.46 0.6 undecidable manual P 137 70.0743 50 0.35 45
IV.ATMC.EHE. 2023-02-09T10:29:34.70 0.3 undecidable manual P 78 71.2731 50 0.41 66
IV.BADI.EHE. 2023-02-09T10:29:34.67 1.0 undecidable manual P 74 76.9674 50 -0.49 21
IV.CASP.HHZ. 2023-02-09T10:29:34.69 0.3 undecidable manual P 213 69.2751 50 0.71 60
IV.MALA1.EHZ. 2023-02-09T10:29:33.44 0.6 undecidable manual S 161 36.741 50 -0.87 39
IV.MALA4.EHZ. 2023-02-09T10:29:33.37 0.6 undecidable manual S 160 36.5412 50 -0.9 39
IV.CRE.HHZ. 2023-02-09T10:29:33.12 0.6 undecidable manual P 56 60.495 50 0.5 44
IV.MALA5.EHZ. 2023-02-09T10:29:33.29 0.6 undecidable manual S 160 36.4413 50 -0.94 38
IV.CRMI.HNN. 2023-02-09T10:29:32.86 1.0 undecidable manual P 332 60.0954 50 0.3 23
IV.RUFI.EHZ. 2023-02-09T10:29:32.84 0.3 undecidable manual P 14 59.6958 50 0.34 68
TV.SF11.HHZ. 2023-02-09T10:29:32.20 0.1 undecidable manual P 150 57.2982 50 0.07 97
IV.CAFI.HHE. 2023-02-09T10:29:31.12 0.3 undecidable manual P 88 51.6039 50 -0.13 72
IV.ARCI.HHZ. 2023-02-09T10:29:31.70 0.3 undecidable manual P 167 52.9026 50 0.25 71
IV.OSSC.HHZ. 2023-02-09T10:29:30.36 0.3 undecidable manual S 344 23.8539 111 -0.18 75
IV.TRIF.CHZ. 2023-02-09T10:29:30.08 0.3 undecidable manual P 237 40.9257 50 0.47 69
IV.MALA4.EHZ. 2023-02-09T10:29:28.73 0.3 undecidable manual P 160 36.5412 50 -0.2 73
IV.MALA5.EHZ. 2023-02-09T10:29:28.71 0.3 undecidable manual P 160 36.4413 50 -0.2 73
IV.CSNT.HHZ. 2023-02-09T10:29:28.02 0.3 undecidable manual S 350 17.6712 118 -0.54 70
IV.MALA1.EHZ. 2023-02-09T10:29:28.68 0.3 undecidable manual P 161 36.741 50 -0.28 72
IV.FROS.CHZ. 2023-02-09T10:29:28.85 0.3 undecidable manual S 229 18.1707 117 0.13 77
IV.FROS.CHZ. 2023-02-09T10:29:26.04 0.1 undecidable manual P 229 18.1707 117 0.31 99
IV.OSSC.HHZ. 2023-02-09T10:29:26.58 0.1 undecidable manual P 344 23.8539 111 -0.21 100
IV.CSNT.HHZ. 2023-02-09T10:29:25.45 0.3 undecidable manual P 350 17.6712 118 -0.19 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.8 0.0005391592000000001 0.3008 AML other m 2023-02-09T10:29:28.38
IV.CSNT.HHN. ML:1.6 0.0003793895 0.1024 AML other m 2023-02-09T10:29:28.54
IV.FROS.CHE. ML:2.6 0.00354 1.86 AML other m 2023-02-09T10:29:29.95
IV.FROS.CHN. ML:2.5 0.002745 0.2 AML other m 2023-02-09T10:29:29.45
IV.OSSC.HHN. ML:1.8 0.0004175239000000001 0.1152 AML other m 2023-02-09T10:29:30.43
IV.OSSC.HHE. ML:2.1 0.00082327455 0.2176 AML other m 2023-02-09T10:29:30.47
IV.TRIF.CHE. ML:1.9 0.0002950639 0.16 AML other m 2023-02-09T10:29:35.84
IV.TRIF.CHN. ML:1.8 0.00021950000000000002 1.72 AML other m 2023-02-09T10:29:35.97
IV.ARCI.HHN. ML:2.1 0.0002860784 0.16 AML other m 2023-02-09T10:29:40.10
IV.ARCI.HNN. ML:2.0 0.0002660762 0.1472 AML other m 2023-02-09T10:29:40.11
IV.ARCI.HHE. ML:2.1 0.0003205 0.18 AML other m 2023-02-09T10:29:40.29
IV.ARCI.HNE. ML:2.1 0.00030928035 0.1856 AML other m 2023-02-09T10:29:40.29
IV.CRE.HHE. ML:1.7 0.00011105000000000002 0.34 AML other m 2023-02-09T10:29:41.60
IV.RUFI.EHE. ML:1.4 0.00004920654500000001 0.2624 AML other m 2023-02-09T10:29:41.84
IV.CRE.HHN. ML:1.6 0.000092093645 0.3584 AML other m 2023-02-09T10:29:43.22
IV.CASP.HHE. ML:1.6 0.000077 0.3 AML other m 2023-02-09T10:29:45.53
IV.CASP.HHN. ML:1.6 0.0000707 0.36 AML other m 2023-02-09T10:29:45.52
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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