Earthquake with magnitude of ML 1.3 on date 09-02-2023 and time 16:52:00 (UTC) in region 4 km E Siena (SI)

A magnitude ML 1.3 earthquake occured in region: 4 km E Siena (SI), on

  • 09-02-2023 16:52:00 (UTC)
  • 09-02-2023 17:52:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3170, 11.3780 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 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 19 5249 109528
Castellina in Chianti SI 19 2859 112387
Radda in Chianti SI 19 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)
51 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)
78 Km SE of Pistoia (90315 inhabitants)
85 Km W of Perugia (166134 inhabitants)
90 Km E of Livorno (159219 inhabitants)
90 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 1.3 2023-02-09
16:52:00
43.3168 11.3785 9 2024-03-01
17:18:17
Bollettino Sismico Italiano INGV 122288811
Reviewed
Rev100
ML 1.1 2023-02-09
16:52:01
43.3207 11.3678 10 2023-02-09
17:01:10
Sala Sismica INGV-Roma 114302341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 16:52:00 ± 0.11
Latitude 43.3168 ± 0.0072
Longitude 11.3785 ± 0.0173
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 122288811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1476
Semi-minor axis of confidence ellipse (meter) 596
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) 1480.0
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 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.16907
Epicentral distance of station farthest from the epicenter (degree) 0.60704
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 122288811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-10-22 15:15:10

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 114302341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 17:01:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HNE. 2023-02-09T16:52:16.20 0.6 undecidable manual S 88 47.4192 50 -0.24 47
IV.MALA1.EHZ. 2023-02-09T16:52:13.00 0.6 undecidable manual S 167 35.6421 50 -0.28 47
IV.MALA2.EHN. 2023-02-09T16:52:13.05 0.6 undecidable manual S 167 35.6421 50 -0.25 48
IV.SACS.HHE. 2023-02-09T16:52:13.93 0.6 undecidable manual P 140 67.377 50 0.96 35
IV.MALA5.EHZ. 2023-02-09T16:52:12.86 0.3 undecidable manual S 167 35.3424 50 -0.34 70
IV.MALA0.EHZ. 2023-02-09T16:52:12.88 0.6 undecidable manual S 167 35.3424 50 -0.33 47
IV.CRE.HHZ. 2023-02-09T16:52:12.23 0.6 undecidable manual P 54 56.9985 50 0.87 37
IV.MALA4.EHZ. 2023-02-09T16:52:12.90 0.6 undecidable manual S 167 35.4423 50 -0.34 47
IV.CAFI.HNE. 2023-02-09T16:52:10.06 0.1 undecidable manual P 88 47.4192 50 0.17 94
IV.ARCI.HHZ. 2023-02-09T16:52:10.84 0.3 undecidable manual P 171 52.2033 50 0.22 69
IV.OSSC.HHZ. 2023-02-09T16:52:10.15 0.6 undecidable manual S 335 25.2525 110 -0.15 49
IV.FROS.CHZ. 2023-02-09T16:52:09.09 0.6 undecidable manual S 237 21.5673 114 0 51
IV.TRIF.CHZ. 2023-02-09T16:52:09.89 0.3 undecidable manual P 240 44.5221 50 0.45 67
IV.MALA4.EHZ. 2023-02-09T16:52:08.06 0.1 undecidable manual P 167 35.4423 50 0.02 100
IV.MALA0.EHZ. 2023-02-09T16:52:08.08 0.1 undecidable manual P 167 35.3424 50 0.05 99
IV.MALA2.EHN. 2023-02-09T16:52:08.10 0.3 undecidable manual P 167 35.6421 50 0.03 75
IV.CSNT.HHZ. 2023-02-09T16:52:07.84 0.6 undecidable manual S 338 18.7701 117 -0.37 48
IV.MALA5.EHZ. 2023-02-09T16:52:07.92 0.3 undecidable manual P 167 35.3424 50 -0.09 74
IV.MALA1.EHZ. 2023-02-09T16:52:07.98 0.3 undecidable manual P 167 35.6421 50 -0.09 74
IV.OSSC.HHZ. 2023-02-09T16:52:06.14 0.1 negative manual P 335 25.2525 110 -0.2 98
IV.FROS.CHZ. 2023-02-09T16:52:05.90 0.1 undecidable manual P 237 21.5673 114 0.26 97
IV.CSNT.HHZ. 2023-02-09T16:52:04.99 0.1 undecidable manual P 338 18.7701 117 -0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:1.1 0.000110881115 0.0768 AML other m 2023-02-09T16:52:08.05
IV.CSNT.HHE. ML:1.6 0.0003025 0.08 AML other m 2023-02-09T16:52:08.07
IV.FROS.CHE. ML:1.8 0.00042587034999999997 0.4608 AML other m 2023-02-09T16:52:09.27
IV.FROS.CHN. ML:1.9 0.0005076161500000001 0.1664 AML other m 2023-02-09T16:52:09.79
IV.OSSC.HHE. ML:1.1 0.00007172400500000001 0.1792 AML other m 2023-02-09T16:52:10.39
IV.OSSC.HHN. ML:1.0 0.000055527355 0.1024 AML other m 2023-02-09T16:52:10.36
IV.ARCI.HHN. ML:1.2 0.000033042160000000004 0.1536 AML other m 2023-02-09T16:52:22.50
IV.ARCI.HHE. ML:1.1 0.000029322805 1.2704 AML other m 2023-02-09T16:52:25.72
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