Earthquake with magnitude of ML 0.6 on date 19-10-2021 and time 04:55:45 (Italy) in region 5 km E Castelnuovo di Val di Cecina (PI)

A magnitude ML 0.6 earthquake occured in region: 5 km E Castelnuovo di Val di Cecina (PI), on

  • 19-10-2021 02:55:45 (UTC)
  • 19-10-2021 04:55:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.21, 10.968 at 6 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.

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 5 2231 2231
Radicondoli SI 8 914 3145
Montieri GR 10 1204 4349
Monterotondo Marittimo GR 12 1371 5720
Chiusdino SI 12 1903 7623
Pomarance PI 13 5897 13520
Casole d'Elsa SI 16 3897 17417
Massa Marittima GR 19 8375 25792
Monticiano SI 19 1571 27363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km W of Siena (53903 inhabitants)
51 Km N of Grosseto (82087 inhabitants)
63 Km S of Scandicci (50609 inhabitants)
66 Km SE of Livorno (159219 inhabitants)
67 Km SW of Firenze (382808 inhabitants)
73 Km SE of Pisa (89158 inhabitants)
75 Km S of Prato (191150 inhabitants)
79 Km W of Arezzo (99543 inhabitants)
80 Km SE of Lucca (89046 inhabitants)
81 Km S of Pistoia (90315 inhabitants)
93 Km SE of Viareggio (62467 inhabitants)
Recent and historical seismicity
Seismic hazard
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 0.6 2021-10-19
43.2103 10.968 6 2021-10-19
Sala Sismica INGV-Roma 96746331
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-10-19 02:55:45 ± 0.38
Latitude 43.2103 ± 0.0117
Longitude 10.9680 ± 0.0099
Depth (km) 6 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96746331


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1203
Semi-minor axis of confidence ellipse (meter) 489
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 0
Circular confidence region, given by single value of horizontal uncertainty (meter) 1200
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.2671
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 4
Magnitude information


Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 96746331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 03:01:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CASP.HHZ. 2021-10-19T02:55:54.20 3.0 undecidable manual P 0
IV.MAGO.CHZ. 2021-10-19T02:55:54.55 0.3 undecidable manual S 286 0.2347 102 -0.34 72
IV.ARCI.HHZ. 2021-10-19T02:55:53.05 3.0 undecidable manual P 0
IV.MAGO.CHZ. 2021-10-19T02:55:51.25 0.3 undecidable manual P 286 0.2347 102 0.26 73
IV.RIBO.EHZ.01 2021-10-19T02:55:51.39 0.1 undecidable manual P 168 0.2671 100 -0.33 96
IV.FROS.CHZ. 2021-10-19T02:55:51.06 0.3 undecidable manual S 90 0.1367 110 -0.22 75
IV.TRIF.CHZ. 2021-10-19T02:55:50.19 0.3 undecidable manual S 207 0.107 115 -0.01 79
IV.FROS.CHZ. 2021-10-19T02:55:49.15 0.1 undecidable manual P 90 0.1367 110 0.24 100
IV.TRIF.CHZ. 2021-10-19T02:55:48.59 0.1 undecidable manual P 207 0.107 115 0.31 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:0.8 8.9083695E-5 0.08 AML other m 2021-10-19T02:55:50.39
IV.TRIF.CHN. ML:0.8 8.9400505E-5 0.088 AML other m 2021-10-19T02:55:50.56
IV.FROS.CHE. ML:0.4 2.8705235E-5 0.224 AML other m 2021-10-19T02:55:51.25
IV.FROS.CHN. ML:0.3 2.14299E-5 0.144 AML other m 2021-10-19T02:55:51.88
IV.RIBO.EHE.01 ML:0.5 1.3592025E-5 0.4992 AML other m 2021-10-19T02:56:00.78
IV.CASP.HHN. ML:0.5 9.9406215E-6 0.9792 AML other m 2021-10-19T02:55:54.43
IV.CASP.HNE. ML:1.9 0.000242869395 0.8192 AML other m 2021-10-19T02:55:54.80
IV.CASP.HNN. ML:2.9 0.00236341023 1.2992 AML other m 2021-10-19T02:56:15.62
IV.CASP.HHE. ML:0.5 1.00089715E-5 0.7792 AML other m 2021-10-19T02:55:54.43
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download