Earthquake with magnitude of ML 1.8 on date 09-02-2023 and time 09:19:30 (Italy) in region 5 km E Siena (SI)

A magnitude ML 1.8 earthquake occured in region: 5 km E Siena (SI), on

  • 09-02-2023 08:19:30 (UTC)
  • 09-02-2023 09:19:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3170, 11.3920 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.

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 5 53903 53903
Castelnuovo Berardenga SI 10 9097 63000
Monteroni d'Arbia SI 10 9088 72088
Sovicille SI 14 10116 82204
Monteriggioni SI 16 9810 92014
Asciano SI 16 7118 99132
Murlo SI 16 2389 101521
Gaiole in Chianti SI 17 2758 104279
Rapolano Terme SI 18 5249 109528
Radda in Chianti SI 19 1613 111141
Castellina in Chianti SI 19 2859 114000

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km E of Siena (53903 inhabitants)
43 Km W of Arezzo (99543 inhabitants)
52 Km S of Firenze (382808 inhabitants)
52 Km SE of Scandicci (50609 inhabitants)
66 Km NE of Grosseto (82087 inhabitants)
67 Km SE of Prato (191150 inhabitants)
79 Km SE of Pistoia (90315 inhabitants)
84 Km W of Perugia (166134 inhabitants)
91 Km E of Livorno (159219 inhabitants)
91 Km E of Pisa (89158 inhabitants)
93 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 1.8 2023-02-09
08:19:30
43.3173 11.3915 6 2024-03-01
17:17:58
Bollettino Sismico Italiano INGV 115207261
Reviewed
Rev100
ML 2.0 2023-02-09
08:19:30
43.3197 11.3843 8 2023-02-09
08:30:31
Sala Sismica INGV-Roma 114286621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-09 08:19:30 ± 0.08
Latitude 43.3173 ± 0.0036
Longitude 11.3915 ± 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 115207261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 623
Semi-minor axis of confidence ellipse (meter) 317
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
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) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.17267
Epicentral distance of station farthest from the epicenter (degree) 0.69787
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:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 114286621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-09 08:30:31

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 115207261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-09-19 09:27:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATMI.HHZ. 2023-02-09T08:19:53.38 0.6 undecidable manual S 88 70.7736 50 0.03 45
IV.CRMI.HNN. 2023-02-09T08:19:51.03 1.0 undecidable manual S 328 62.5929 50 -0.13 23
IV.RUFI.EHZ. 2023-02-09T08:19:49.56 0.3 undecidable manual S 9 58.497 50 -0.53 62
IV.CRE.HHZ. 2023-02-09T08:19:49.64 0.6 undecidable manual S 53 56.1993 50 0.18 45
IV.ARCI.HHZ. 2023-02-09T08:19:48.30 0.6 undecidable manual S 172 52.1034 50 -0.07 47
TV.SF11.HHZ. 2023-02-09T08:19:47.90 0.6 undecidable manual S 155 54.9006 50 -1.24 31
IV.CAFI.HHZ. 2023-02-09T08:19:46.10 0.3 undecidable manual S 88 46.4202 50 -0.76 58
IV.PARC.HHZ. 2023-02-09T08:19:45.23 0.3 undecidable manual P 61 77.4669 50 0.32 63
IV.CASP.HHE. 2023-02-09T08:19:44.28 1.0 undecidable manual P 216 72.2721 50 0.16 22
IV.MGAB.HHZ. 2023-02-09T08:19:44.84 0.6 undecidable manual P 127 73.6707 50 0.52 41
IV.ATMC.EHE. 2023-02-09T08:19:43.61 0.6 undecidable manual P 77 66.1893 50 0.43 42
IV.SACS.HHE. 2023-02-09T08:19:43.74 0.3 undecidable manual P 141 66.7776 50 0.47 63
IV.ATMI.HHZ. 2023-02-09T08:19:43.89 1.0 undecidable manual P 88 70.7736 50 0.01 23
IV.CRMI.HNN. 2023-02-09T08:19:42.68 0.3 undecidable manual P 328 62.5929 50 0.06 69
IV.MALA5.EHN. 2023-02-09T08:19:42.80 0.6 undecidable manual S 168 35.1426 100 -0.51 44
IV.MCIV.CHE. 2023-02-09T08:19:42.89 0.3 undecidable manual P 159 64.0914 50 0.04 69
IV.RUFI.EHZ. 2023-02-09T08:19:42.35 0.3 undecidable manual P 9 58.497 50 0.35 65
IV.MALA1.EHN. 2023-02-09T08:19:42.94 0.3 undecidable manual S 169 35.4423 100 -0.49 66
IV.MALA4.EHN. 2023-02-09T08:19:42.91 0.6 undecidable manual S 169 35.2425 100 -0.45 44
IV.CRE.HHZ. 2023-02-09T08:19:42.18 0.6 undecidable manual P 53 56.1993 50 0.55 41
IV.ARCI.HHZ. 2023-02-09T08:19:41.00 0.3 undecidable manual P 172 52.1034 50 0 71
TV.SF11.HHZ. 2023-02-09T08:19:41.48 0.3 undecidable manual P 155 54.9006 50 0.04 70
IV.CAFI.HHZ. 2023-02-09T08:19:40.27 0.3 undecidable manual P 88 46.4202 50 0.14 70
IV.TRIF.CHZ. 2023-02-09T08:19:39.88 0.6 undecidable manual P 241 45.4212 50 -0.1 47
IV.FROS.CHZ. 2023-02-09T08:19:39.06 0.3 undecidable manual S 238 22.4553 106 0.04 74
IV.OSSC.HHZ. 2023-02-09T08:19:39.73 0.3 undecidable manual S 333 25.752 104 -0.39 69
IV.MALA1.EHN. 2023-02-09T08:19:38.37 0.3 undecidable manual P 169 35.4423 100 0.22 70
IV.MALA5.EHN. 2023-02-09T08:19:38.48 0.3 undecidable manual P 168 35.1426 100 0.4 67
IV.MALA4.EHN. 2023-02-09T08:19:38.30 0.3 undecidable manual P 169 35.2425 100 0.19 70
IV.CSNT.HHZ. 2023-02-09T08:19:37.69 0.3 undecidable manual S 335 19.1697 108 -0.22 72
IV.OSSC.HHZ. 2023-02-09T08:19:36.16 0.1 undecidable manual P 333 25.752 104 -0.08 98
IV.FROS.CHZ. 2023-02-09T08:19:35.89 0.1 undecidable manual P 238 22.4553 106 0.29 94
IV.CSNT.HHZ. 2023-02-09T08:19:34.95 0.1 undecidable manual P 335 19.1697 108 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:2.2 0.001313525 0.2624 AML other m 2023-02-09T08:19:37.95
IV.CSNT.HHN. ML:2.1 0.0010004999999999999 0.26 AML other m 2023-02-09T08:19:38.09
IV.FROS.CHE. ML:2.0 0.0006638008499999999 0.16 AML other m 2023-02-09T08:19:39.31
IV.FROS.CHN. ML:2.3 0.001593763 0.1664 AML other m 2023-02-09T08:19:39.74
IV.OSSC.HHE. ML:1.8 0.0004112751 0.32 AML other m 2023-02-09T08:19:40.24
IV.OSSC.HHN. ML:1.8 0.000381 0.26 AML other m 2023-02-09T08:19:40.66
IV.CAFI.HNE. ML:1.5 0.00008328921 0.2752 AML other m 2023-02-09T08:19:46.53
IV.CAFI.HHE. ML:1.5 0.00008500367 0.2752 AML other m 2023-02-09T08:19:46.53
IV.CAFI.HHN. ML:1.6 0.0001063317 0.2624 AML other m 2023-02-09T08:19:47.30
IV.CAFI.HNN. ML:1.5 0.00009851621 0.2496 AML other m 2023-02-09T08:19:47.31
IV.ARCI.HHE. ML:1.9 0.00018632730000000001 0.1408 AML other m 2023-02-09T08:19:49.25
IV.ARCI.HNE. ML:1.8 0.00017218603999999998 0.1408 AML other m 2023-02-09T08:19:49.26
IV.ARCI.HHN. ML:2.0 0.00024895085 0.1792 AML other m 2023-02-09T08:19:49.47
IV.ARCI.HNN. ML:2.0 0.00024237220000000002 0.1984 AML other m 2023-02-09T08:19:49.48
IV.RUFI.EHN. ML:1.5 0.000063382075 0.6784 AML other m 2023-02-09T08:19:50.14
IV.CRE.HHE. ML:1.7 0.00011454698999999999 0.4608 AML other m 2023-02-09T08:19:50.36
IV.RUFI.EHE. ML:1.5 0.00007600433000000001 0.4992 AML other m 2023-02-09T08:19:50.80
IV.CRE.HHN. ML:1.6 0.000100794265 0.1984 AML other m 2023-02-09T08:19:51.05
IV.PARC.HHN. ML:1.4 0.0000416961 0.4992 AML other m 2023-02-09T08:19:56.27
IV.ATMI.HHE. ML:2.0 0.0001815 0.78 AML other m 2023-02-09T08:19:59.04
IV.ATMI.HHN. ML:1.9 0.00013530704999999997 0.3968 AML other m 2023-02-09T08:20:01.04
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
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