Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 03-11-2023 and time 03:01:26 (Italy) in region 5 km NW Chiusdino (SI)

A magnitude ML 1.3 earthquake occured in region: 5 km NW Chiusdino (SI), on

  • 03-11-2023 02:01:26 (UTC)
  • 03-11-2023 03:01:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1960, 11.0550 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Chiusdino SI 5 1903 1903
Radicondoli SI 7 914 2817
Montieri GR 8 1204 4021
Castelnuovo di Val di Cecina PI 12 2231 6252
Monticiano SI 12 1571 7823
Casole d'Elsa SI 16 3897 11720
Sovicille SI 17 10116 21836
Monterotondo Marittimo GR 17 1371 23207
Pomarance PI 19 5897 29104

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Siena (53903 inhabitants)
49 Km N of Grosseto (82087 inhabitants)
63 Km S of Scandicci (50609 inhabitants)
66 Km S of Firenze (382808 inhabitants)
72 Km SE of Livorno (159219 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
76 Km S of Prato (191150 inhabitants)
78 Km SE of Pisa (89158 inhabitants)
83 Km S of Pistoia (90315 inhabitants)
85 Km SE of Lucca (89046 inhabitants)
99 Km SE of Viareggio (62467 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
Reviewed
Rev100 		ML 1.3 2023-11-03
02:01:26		 43.1963 11.0548 9 2023-11-03
02:10:13		 Sala Sismica INGV-Roma 122712531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-03 02:01:26 ± 0.1
Latitude 43.1963 ± 0.0081
Longitude 11.0548 ± 0.0136
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122712531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1271
Semi-minor axis of confidence ellipse (meter) 464
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 132
Circular confidence region, given by single value of horizontal uncertainty (meter) 1270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.65111
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 122712531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-03 02:10:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2023-11-03T02:01:40.28 0.1 undecidable manual P 324 72.2721 50 0.51 82
IV.CRMI.HNN. 2023-11-03T02:01:39.26 0.1 undecidable manual P 355 66.7776 50 0.33 86
IV.CSNT.HHZ. 2023-11-03T02:01:39.09 0.3 undecidable manual S 32 36.1416 50 -0.43 67
IV.OSSC.HHZ. 2023-11-03T02:01:39.87 0.3 undecidable manual S 23 39.4272 50 -0.54 65
IV.RIBO.EHZ.01 2023-11-03T02:01:36.59 0.3 undecidable manual S 181 27.4503 108 -0.35 69
IV.CASP.HHZ. 2023-11-03T02:01:36.38 0.1 undecidable manual P 199 47.5191 50 0.41 88
IV.OSSC.HHZ. 2023-11-03T02:01:34.59 0.1 undecidable manual P 23 39.4272 50 -0.13 95
IV.LOCA.HHZ. 2023-11-03T02:01:34.61 0.3 undecidable manual S 54 20.7681 113 -0.16 73
IV.CSNT.HHZ. 2023-11-03T02:01:34.03 0.1 undecidable manual P 32 36.1416 50 -0.17 94
IV.TRIF.CHZ. 2023-11-03T02:01:32.47 0.3 undecidable manual S 234 15.2736 120 -0.6 66
IV.RIBO.EHZ.01 2023-11-03T02:01:32.83 0.1 undecidable manual P 181 27.4503 108 0.12 97
IV.LOCA.HHZ. 2023-11-03T02:01:31.68 0.1 undecidable manual P 54 20.7681 113 0.22 96
IV.FROS.CHZ. 2023-11-03T02:01:31.18 0.3 undecidable manual S 80 8.2806 137 0.02 77
IV.TRIF.CHZ. 2023-11-03T02:01:30.41 0.1 undecidable manual P 234 15.2736 120 -0.07 100
IV.FROS.CHZ. 2023-11-03T02:01:29.73 0.1 positive manual P 80 8.2806 137 0.35 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.6 0.000647 0.28 AML other m 2023-11-03T02:01:31.41
IV.FROS.CHN. ML:1.7 0.000717346401 0.096 AML other m 2023-11-03T02:01:31.57
IV.TRIF.CHN. ML:1.5 0.00032454145 0.096 AML other m 2023-11-03T02:01:33.45
IV.TRIF.CHE. ML:1.8 0.00067442765 0.224 AML other m 2023-11-03T02:01:33.08
IV.RIBO.EHE.01 ML:1.3 0.00009853933499999999 0.12 AML other m 2023-11-03T02:01:36.82
IV.RIBO.EHN.01 ML:1.4 0.00013525325 0.1392 AML other m 2023-11-03T02:01:37.65
IV.CSNT.HHE. ML:0.9 0.000031337299999999996 0.12 AML other m 2023-11-03T02:01:39.27
IV.CSNT.HHN. ML:0.8 0.000026838435 0.1008 AML other m 2023-11-03T02:01:39.50
IV.OSSC.HHE. ML:1.2 0.00005483397999999999 0.1792 AML other m 2023-11-03T02:01:40.59
IV.CASP.HHE. ML:0.8 0.00001803733 0.0608 AML other m 2023-11-03T02:01:42.30
IV.CASP.HHN. ML:0.8 0.00002189725 0.08 AML other m 2023-11-03T02:01:43.09
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