Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 09-02-2023 and time 08:27:23 (Italy) in region 4 km E Siena (SI)

A magnitude ML 2.2 earthquake occured in region: 4 km E Siena (SI), on

  • 09-02-2023 07:27:23 (UTC)
  • 09-02-2023 08:27:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3120, 11.3800 at 6 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 4 53903 53903
Monteroni d'Arbia SI 10 9088 62991
Castelnuovo Berardenga SI 11 9097 72088
Sovicille SI 13 10116 82204
Monteriggioni SI 16 9810 92014
Murlo SI 16 2389 94403
Asciano SI 17 7118 101521
Gaiole in Chianti SI 18 2758 104279
Rapolano Terme SI 18 5249 109528
Castellina in Chianti SI 19 2859 112387
Radda in Chianti SI 20 1613 114000

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km E of Siena (53903 inhabitants)
44 Km W of Arezzo (99543 inhabitants)
52 Km S of Firenze (382808 inhabitants)
52 Km SE of Scandicci (50609 inhabitants)
65 Km NE of Grosseto (82087 inhabitants)
67 Km SE of Prato (191150 inhabitants)
79 Km SE of Pistoia (90315 inhabitants)
85 Km W of Perugia (166134 inhabitants)
91 Km E of Livorno (159219 inhabitants)
91 Km E 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 2.2 2023-02-09
07:27:23		 43.312 11.3798 6 2024-03-01
17:17:57		 Bollettino Sismico Italiano INGV 114888661
Reviewed
Rev100 		ML 2.2 2023-02-09
07:27:23		 43.3228 11.4022 5 2023-02-09
08:15:01		 Sala Sismica INGV-Roma 114285531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 07:27:23 ± 0.08
Latitude 43.3120 ± 0.0036
Longitude 11.3798 ± 0.0087
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114888661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 569
Semi-minor axis of confidence ellipse (meter) 385
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.02433
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 114285531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 08:15:01

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 114888661
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-09-19 08:03:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ST.OZOL.EHZ. 2023-02-09T07:28:56.11 3.0 undecidable manual Sg 5.35 0
IV.BAG8.HNZ. 2023-02-09T07:28:35.90 3.0 undecidable manual Sn -2.48 0
IV.BAG8.HNZ. 2023-02-09T07:28:12.63 3.0 negative manual Pn 6.85 0
IV.MSSA.HHZ. 2023-02-09T07:27:57.28 3.0 positive manual Pg 3.97 0
IV.SEI.HHZ. 2023-02-09T07:27:49.13 0.6 undecidable manual S 359 82.3509 50 -0.13 45
IV.BOSL.HHZ. 2023-02-09T07:27:45.28 0.3 undecidable manual S 360 68.6757 50 -0.32 66
IV.CELB.HHN. 2023-02-09T07:27:44.16 0.6 undecidable manual P 237 113.6973 50 0.85 34
IV.CRMI.HHE. 2023-02-09T07:27:43.35 0.6 undecidable manual S 329 62.5929 50 -0.62 41
IV.CRE.HHZ. 2023-02-09T07:27:42.54 0.3 undecidable manual S 53 57.2982 50 -0.02 72
IV.RUFI.EHZ. 2023-02-09T07:27:42.72 0.3 undecidable manual S 10 59.2962 50 -0.38 67
IV.ARCI.HHZ. 2023-02-09T07:27:40.99 0.6 undecidable manual S 171 51.6039 50 -0.06 48
TV.SF11.HHZ. 2023-02-09T07:27:40.70 0.6 undecidable manual S 154 54.8007 50 -1.21 32
IV.ATPI.EHZ. 2023-02-09T07:27:39.07 0.6 undecidable manual P 79 83.8494 50 0.36 43
IV.ATVO.HHZ. 2023-02-09T07:27:39.12 0.6 undecidable manual P 84 83.1501 50 0.51 41
IV.SEI.HHZ. 2023-02-09T07:27:39.01 0.6 undecidable manual P 359 82.3509 50 0.53 41
IV.CAFI.HHZ. 2023-02-09T07:27:39.19 0.6 undecidable manual S 87 47.3193 50 -0.73 40
IV.SFI.EHZ. 2023-02-09T07:27:38.02 0.1 undecidable manual P 30 75.6687 50 0.56 82
IV.TRIF.CHZ. 2023-02-09T07:27:38.18 0.6 undecidable manual S 241 44.3223 50 -0.94 37
IV.PII.HHZ. 2023-02-09T07:27:38.81 1.0 undecidable manual P 304 82.4508 50 0.31 22
IV.PARC.HHZ. 2023-02-09T07:27:38.32 0.3 undecidable manual P 61 78.5658 50 0.42 64
IV.ATMI.HHZ. 2023-02-09T07:27:37.84 1.0 undecidable manual P 88 71.6727 50 1 17
IV.CASP.HHZ. 2023-02-09T07:27:37.22 0.3 undecidable manual P 216 71.2731 50 0.44 64
IV.SSP9.EHZ. 2023-02-09T07:27:36.83 0.3 undecidable manual P 64 67.0773 50 0.69 59
IV.MGAB.HHZ. 2023-02-09T07:27:36.23 0.6 undecidable manual P 127 73.9704 50 -0.97 35
IV.BOSL.HHZ. 2023-02-09T07:27:36.79 0.6 undecidable manual P 360 68.6757 50 0.42 43
IV.CRMI.HHE. 2023-02-09T07:27:35.30 1.0 undecidable manual P 329 62.5929 50 -0.13 23
IV.MALA4.EHE. 2023-02-09T07:27:35.65 0.6 undecidable manual S 167 34.9428 100 -0.42 46
IV.MALA5.EHE. 2023-02-09T07:27:35.58 0.6 undecidable manual S 167 34.743 100 -0.44 46
IV.RUFI.EHZ. 2023-02-09T07:27:35.11 0.1 undecidable manual P 10 59.2962 50 0.18 92
IV.MALA1.EHE. 2023-02-09T07:27:35.66 0.1 undecidable manual S 167 35.0427 100 -0.47 91
TV.SF11.HHZ. 2023-02-09T07:27:34.16 0.3 undecidable manual P 154 54.8007 50 -0.08 71
IV.CRE.HHZ. 2023-02-09T07:27:34.90 1.0 undecidable manual P 53 57.2982 50 0.29 23
IV.CAFI.HHZ. 2023-02-09T07:27:33.13 0.3 undecidable manual P 87 47.3193 50 0.04 73
IV.ARCI.HHZ. 2023-02-09T07:27:33.75 0.1 undecidable manual P 171 51.6039 50 0 97
IV.TRIF.CHZ. 2023-02-09T07:27:32.84 0.6 undecidable manual P 241 44.3223 50 0.21 47
IV.OSSC.HHZ. 2023-02-09T07:27:32.57 0.3 undecidable manual S 335 25.8519 104 -0.43 70
IV.FROS.CHZ. 2023-02-09T07:27:31.85 0.3 undecidable manual S 238 21.3675 107 0.36 72
IV.MALA4.EHE. 2023-02-09T07:27:31.07 0.1 undecidable manual P 167 34.9428 100 0.2 96
IV.MALA5.EHE. 2023-02-09T07:27:31.11 0.6 undecidable manual P 167 34.743 100 0.27 47
IV.CSNT.HHZ. 2023-02-09T07:27:30.49 0.1 undecidable manual S 338 19.2696 108 -0.31 97
IV.MALA1.EHE. 2023-02-09T07:27:30.92 0.1 undecidable manual P 167 35.0427 100 0.02 100
IV.OSSC.HHZ. 2023-02-09T07:27:28.88 0.1 negative manual P 335 25.8519 104 -0.21 98
IV.FROS.CHZ. 2023-02-09T07:27:28.63 0.1 positive manual P 238 21.3675 107 0.41 94
IV.CSNT.HHZ. 2023-02-09T07:27:27.66 0.1 undecidable manual P 338 19.2696 108 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:2.8 0.004819432 0.1024 AML other m 2023-02-09T07:27:30.69
IV.CSNT.HHN. ML:2.7 0.003955 0.32 AML other m 2023-02-09T07:27:30.55
IV.FROS.CHE. ML:2.6 0.0028314425 0.1408 AML other m 2023-02-09T07:27:31.97
IV.FROS.CHN. ML:2.8 0.00546 0.16 AML other m 2023-02-09T07:27:32.48
IV.OSSC.HHN. ML:2.5 0.002025 1.26 AML other m 2023-02-09T07:27:32.30
IV.OSSC.HHE. ML:2.4 0.0015881585 0.2368 AML other m 2023-02-09T07:27:33.01
IV.CAFI.HHN. ML:2.1 0.000336 0.38 AML other m 2023-02-09T07:27:40.12
IV.CAFI.HNN. ML:2.1 0.0003370533 0.3776 AML other m 2023-02-09T07:27:40.13
IV.CAFI.HNE. ML:1.9 0.00024230324999999998 0.3776 AML other m 2023-02-09T07:27:42.47
IV.ARCI.HHN. ML:2.4 0.0007434456 0.32 AML other m 2023-02-09T07:27:42.29
IV.ARCI.HNN. ML:2.4 0.0007312107 0.3136 AML other m 2023-02-09T07:27:42.29
IV.CAFI.HHE. ML:2.0 0.000258 0.34 AML other m 2023-02-09T07:27:42.47
IV.RUFI.EHE. ML:2.2 0.0003076818 0.5376 AML other m 2023-02-09T07:27:42.92
IV.ARCI.HHE. ML:2.3 0.00046544074999999995 0.3456 AML other m 2023-02-09T07:27:42.90
IV.ARCI.HNE. ML:2.2 0.0004515 1.12 AML other m 2023-02-09T07:27:42.90
IV.RUFI.EHN. ML:2.1 0.0002475 1.22 AML other m 2023-02-09T07:27:42.91
IV.CRE.HHE. ML:2.3 0.00040300000000000004 0.44 AML other m 2023-02-09T07:27:43.17
IV.BOSL.HHN. ML:1.9 0.00012341093 0.2048 AML other m 2023-02-09T07:27:45.70
IV.BOSL.HHE. ML:2.3 0.00031825740000000004 0.4416 AML other m 2023-02-09T07:27:45.66
IV.SSP9.EHE. ML:2.1 0.00021627225 0.3648 AML other m 2023-02-09T07:27:46.84
IV.CRE.HHN. ML:2.3 0.000404 1.7 AML other m 2023-02-09T07:27:46.86
IV.CASP.HHN. ML:2.4 0.00042249999999999997 0.6 AML other m 2023-02-09T07:27:48.49
IV.CASP.HNN. ML:2.4 0.000445 0.32 AML other m 2023-02-09T07:27:48.51
IV.CASP.HHE. ML:2.3 0.0003565 0.28 AML other m 2023-02-09T07:27:48.72
IV.CASP.HNE. ML:2.3 0.0003513946 0.2816 AML other m 2023-02-09T07:27:48.60
IV.PARC.HHN. ML:2.0 0.00013079371000000002 1.6992 AML other m 2023-02-09T07:27:48.09
IV.PARC.HHE. ML:1.9 0.00011595 1.56 AML other m 2023-02-09T07:27:49.91
IV.SSP9.EHN. ML:2.2 0.00024750425 1.6032 AML other m 2023-02-09T07:27:49.13
IV.SFI.HNE. ML:2.1 0.0001959321 1.4304 AML other m 2023-02-09T07:27:50.23
IV.SFI.EHE. ML:1.9 0.00011824575 1.4624 AML other m 2023-02-09T07:27:50.96
IV.SFI.EHN. ML:1.8 0.000091016265 0.4416 AML other m 2023-02-09T07:27:50.84
IV.ATPI.EHN. ML:2.0 0.000129016435 1.3024 AML other m 2023-02-09T07:27:52.08
IV.SEI.HHN. ML:2.7 0.000711 0.32 AML other m 2023-02-09T07:27:52.15
IV.PII.HHN. ML:2.2 0.00020250000000000002 0.28 AML other m 2023-02-09T07:27:52.04
IV.ATMI.HHE. ML:2.6 0.0006383984499999999 0.3584 AML other m 2023-02-09T07:27:52.42
IV.ATVO.HNE. ML:2.1 0.00016488225000000002 0.5248 AML other m 2023-02-09T07:27:52.30
IV.ATVO.HHN. ML:2.0 0.0001455 0.52 AML other m 2023-02-09T07:27:53.57
IV.ATMI.HHN. ML:2.4 0.0004121731 0.48 AML other m 2023-02-09T07:27:53.88
IV.ATVO.HHE. ML:2.1 0.00015577370000000002 0.5248 AML other m 2023-02-09T07:27:54.85
IV.PII.HHE. ML:1.9 0.00011072078000000001 1.616 AML other m 2023-02-09T07:27:55.81
IV.SEI.HHE. ML:2.4 0.0003619027 0.4992 AML other m 2023-02-09T07:27:55.05
IV.ATPI.EHE. ML:2.0 0.00014000000000000001 0.62 AML other m 2023-02-09T07:27:56.29
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