Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 25-06-2023 and time 18:30:53 (UTC) in region 1 km NW Castelnuovo di Val di Cecina (PI)

A magnitude ML 1.4 earthquake occured in region: 1 km NW Castelnuovo di Val di Cecina (PI), on

  • 25-06-2023 18:30:53 (UTC)
  • 25-06-2023 20:30:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2120, 10.9010 at 10 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.

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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
Castelnuovo di Val di Cecina PI 1 2231 2231
Monterotondo Marittimo GR 8 1371 3602
Pomarance PI 10 5897 9499
Radicondoli SI 13 914 10413
Montieri GR 13 1204 11617
Monteverdi Marittimo PI 16 758 12375
Chiusdino SI 16 1903 14278
Massa Marittima GR 18 8375 22653
Casole d'Elsa SI 19 3897 26550

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Siena (53903 inhabitants)
53 Km NW of Grosseto (82087 inhabitants)
61 Km SE of Livorno (159219 inhabitants)
65 Km SW of Scandicci (50609 inhabitants)
68 Km SW of Firenze (382808 inhabitants)
69 Km SE of Pisa (89158 inhabitants)
76 Km S of Prato (191150 inhabitants)
77 Km SE of Lucca (89046 inhabitants)
80 Km S of Pistoia (90315 inhabitants)
84 Km W of Arezzo (99543 inhabitants)
90 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 1.4 2023-06-25
18:30:53		 43.2118 10.9013 10 2023-06-25
18:37:18		 Sala Sismica INGV-Roma 118720461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-06-25 18:30:53 ± 0.14
Latitude 43.2118 ± 0.0063
Longitude 10.9013 ± 0.0123
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 118720461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 917
Semi-minor axis of confidence ellipse (meter) 567
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 107
Circular confidence region, given by single value of horizontal uncertainty (meter) 920.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
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) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.68618
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 118720461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-06-25 18:37:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRMI.HHN. 2023-06-25T18:31:13.32 0.6 undecidable manual S 6 65.0904 50 0.06 46
IV.PII.HHE. 2023-06-25T18:31:12.60 0.3 undecidable manual S 332 64.1913 50 -0.43 64
IV.CASP.HHZ. 2023-06-25T18:31:08.23 0.3 undecidable manual S 184 46.8198 50 -0.16 69
IV.CELB.HHE. 2023-06-25T18:31:07.24 0.1 undecidable manual P 228 76.1682 50 0.79 73
IV.CSNT.HHZ. 2023-06-25T18:31:06.95 0.3 undecidable manual S 47 42.7239 50 -0.34 67
IV.PII.HHE. 2023-06-25T18:31:04.43 0.1 undecidable manual P 332 64.1913 50 -0.18 89
IV.CRMI.HHN. 2023-06-25T18:31:04.95 0.3 undecidable manual P 6 65.0904 50 0.21 66
IV.RIBO.EHZ. 2023-06-25T18:31:03.79 0.3 undecidable manual S 158 31.4463 50 -0.5 66
IV.CASP.HHZ. 2023-06-25T18:31:02.26 0.1 undecidable manual P 184 46.8198 50 0.33 89
IV.CSNT.HHZ. 2023-06-25T18:31:01.39 0.6 undecidable manual P 47 42.7239 50 0.09 47
IV.FROS.CHZ. 2023-06-25T18:31:01.22 0.3 undecidable manual S 91 20.5683 115 0.23 72
IV.RIBO.EHZ. 2023-06-25T18:30:59.76 0.1 undecidable manual P 158 31.4463 50 0.2 94
IV.FROS.CHZ. 2023-06-25T18:30:57.81 0.1 undecidable manual P 91 20.5683 115 0.16 97
IV.TRIF.CHZ. 2023-06-25T18:30:57.51 0.3 undecidable manual S 179 10.7781 132 -0.59 66
IV.TRIF.CHZ. 2023-06-25T18:30:55.89 0.1 undecidable manual P 179 10.7781 132 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.8 0.000712 0.52 AML other m 2023-06-25T18:30:58.93
IV.TRIF.CHN. ML:1.9 0.0009595000000000001 0.18 AML other m 2023-06-25T18:30:58.86
IV.FROS.CHN. ML:1.4 0.000203 0.38 AML other m 2023-06-25T18:31:01.75
IV.FROS.CHE. ML:1.6 0.000258 1.08 AML other m 2023-06-25T18:31:03.64
IV.RIBO.EHN. ML:1.1 0.000053649999999999996 1.52 AML other m 2023-06-25T18:31:06.13
IV.CSNT.HHN. ML:1.1 0.000039349999999999994 0.56 AML other m 2023-06-25T18:31:07.59
IV.CSNT.HHE. ML:1.0 0.0000323 0.54 AML other m 2023-06-25T18:31:08.48
IV.RIBO.EHE. ML:1.5 0.00016200000000000003 0.42 AML other m 2023-06-25T18:31:16.75
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