Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 30-12-2021 and time 06:32:58 (UTC) in region 4 km NE Castelnuovo di Val di Cecina (PI)

A magnitude ML 1.5 earthquake occured in region: 4 km NE Castelnuovo di Val di Cecina (PI), on

  • 30-12-2021 06:32:58 (UTC)
  • 30-12-2021 07:32:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2310, 10.9500 at 8 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.

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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 4 2231 2231
Radicondoli SI 8 914 3145
Pomarance PI 10 5897 9042
Monterotondo Marittimo GR 12 1371 10413
Montieri GR 12 1204 11617
Chiusdino SI 14 1903 13520
Casole d'Elsa SI 15 3897 17417
Monteverdi Marittimo PI 20 758 18175

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Siena (53903 inhabitants)
54 Km N of Grosseto (82087 inhabitants)
62 Km SW of Scandicci (50609 inhabitants)
63 Km SE of Livorno (159219 inhabitants)
65 Km SW of Firenze (382808 inhabitants)
70 Km SE of Pisa (89158 inhabitants)
73 Km S of Prato (191150 inhabitants)
77 Km SE of Lucca (89046 inhabitants)
78 Km S of Pistoia (90315 inhabitants)
80 Km W of Arezzo (99543 inhabitants)
91 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
Bulletin
Rev1000 		ML 1.5 2021-12-30
06:32:58		 43.2308 10.9498 8 2022-03-30
13:04:25		 Bollettino Sismico Italiano INGV 99228111
Reviewed
Rev100 		ML 1.5 2021-12-30
06:32:58		 43.2422 10.9467 4 2021-12-30
06:43:31		 Sala Sismica INGV-Roma 99140611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-30 06:32:58 ± 0.12
Latitude 43.2308 ± 0.0063
Longitude 10.9498 ± 0.0099
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99228111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 770
Semi-minor axis of confidence ellipse (meter) 561
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86964
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 99140611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-30 06:43:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 99228111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-03 11:10:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2021-12-30T06:34:34.02 3.0 undecidable manual Pg 18.23 0
IV.SERS.HHZ. 2021-12-30T06:34:32.33 3.0 undecidable manual Pn 1.83 0
IV.ERC.EHZ. 2021-12-30T06:34:30.79 3.0 undecidable manual Pg 9.97 0
IV.CARE.EHZ. 2021-12-30T06:34:16.98 3.0 undecidable manual P 0
IV.VOBA.EHZ. 2021-12-30T06:34:15.13 3.0 undecidable manual Sg 2.93 0
IV.STAL.HHZ. 2021-12-30T06:34:00.21 3.0 undecidable manual Pg 8 0
IV.CPOZ.HHZ. 2021-12-30T06:33:58.29 3.0 negative manual Pg 4.29 0
IV.PTRJ.HHZ. 2021-12-30T06:33:58.31 3.0 undecidable manual Pg 6.05 0
IV.CRTC.HHZ. 2021-12-30T06:33:48.70 3.0 undecidable manual S -1.78 0
IV.LPEL.HHZ. 2021-12-30T06:33:44.19 3.0 undecidable manual Pn -0.08 0
IV.PII.HHZ. 2021-12-30T06:33:18.00 0.6 undecidable manual S 328 64.2912 50 -0.65 40
IV.BDI.HNZ. 2021-12-30T06:33:15.74 1.0 undecidable manual P 343 96.5256 50 0.75 18
GU.POPM.HHZ. 2021-12-30T06:33:15.18 0.6 undecidable manual P 350 91.6416 50 0.95 33
IV.CASP.HHZ. 2021-12-30T06:33:13.95 0.6 undecidable manual S 188 49.3173 50 -0.69 40
IV.CELB.HHZ. 2021-12-30T06:33:13.52 0.3 undecidable manual P 228 80.5638 50 1 50
IV.RUFI.EHZ. 2021-12-30T06:33:12.96 0.3 undecidable manual P 34 80.9523 50 0.37 63
IV.OSSC.HHZ. 2021-12-30T06:33:11.63 0.6 undecidable manual S 36 40.3263 50 -0.61 42
IV.CSNT.HHZ. 2021-12-30T06:33:11.11 0.6 undecidable manual S 45 38.4282 50 -0.63 42
IV.PII.HHZ. 2021-12-30T06:33:10.16 0.6 undecidable manual P 328 64.2912 50 0.14 45
IV.RIBO.EHZ.01 2021-12-30T06:33:09.23 0.3 undecidable manual S 166 32.2455 103 -0.49 67
IV.ARCI.HHZ. 2021-12-30T06:33:09.96 0.3 undecidable manual P 134 59.8956 50 0.63 60
IV.CRMI.HHZ. 2021-12-30T06:33:09.95 0.3 undecidable manual P 2 62.6928 50 0.18 68
IV.CASP.HHZ. 2021-12-30T06:33:07.71 0.1 undecidable manual P 188 49.3173 50 0 96
IV.MAGO.CHZ. 2021-12-30T06:33:06.26 0.6 undecidable manual S 281 24.0537 107 -0.73 41
IV.OSSC.HHZ. 2021-12-30T06:33:06.19 0.1 undecidable manual P 36 40.3263 50 -0.13 95
IV.CSNT.HHZ. 2021-12-30T06:33:05.83 0.1 undecidable manual P 45 38.4282 50 -0.2 94
IV.FROS.CHZ. 2021-12-30T06:33:04.49 0.6 undecidable manual S 98 16.872 114 -0.15 49
IV.RIBO.EHZ.01 2021-12-30T06:33:04.86 0.3 undecidable manual P 166 32.2455 103 -0.01 74
IV.TRIF.CHZ. 2021-12-30T06:33:03.25 0.6 undecidable manual S 197 13.4754 119 -0.33 48
IV.MAGO.CHZ. 2021-12-30T06:33:03.31 0.1 undecidable manual P 281 24.0537 107 0.02 100
IV.FROS.CHZ. 2021-12-30T06:33:02.19 0.1 undecidable manual P 98 16.872 114 0.25 97
IV.TRIF.CHZ. 2021-12-30T06:33:01.56 0.1 undecidable manual P 197 13.4754 119 0.24 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.8 0.000801 0.66 AML other m 2021-12-30T06:33:03.73
IV.TRIF.CHN. ML:1.8 0.0007475 0.38 AML other m 2021-12-30T06:33:03.80
IV.FROS.CHE. ML:1.0 0.000105599745 0.3264 AML other m 2021-12-30T06:33:04.68
IV.FROS.CHN. ML:1.1 0.00012368393 0.448 AML other m 2021-12-30T06:33:04.54
IV.MAGO.CHE. ML:1.8 0.00038950000000000003 0.18 AML other m 2021-12-30T06:33:06.92
IV.MAGO.CHN. ML:1.7 0.00032 1.82 AML other m 2021-12-30T06:33:06.06
IV.RIBO.EHN.01 ML:1.7 0.000224 1.04 AML other m 2021-12-30T06:33:09.32
IV.CSNT.HHE. ML:1.2 0.000056500000000000005 0.66 AML other m 2021-12-30T06:33:11.60
IV.RIBO.EHE.01 ML:1.6 0.000185 0.76 AML other m 2021-12-30T06:33:11.71
IV.OSSC.HHN. ML:1.4 0.00008505000000000001 0.84 AML other m 2021-12-30T06:33:12.86
IV.OSSC.HHE. ML:1.4 0.00007755 0.16 AML other m 2021-12-30T06:33:13.07
IV.CSNT.HHN. ML:1.2 0.00006325 1.34 AML other m 2021-12-30T06:33:13.20
IV.CASP.HHN. ML:1.3 0.0000535 1.18 AML other m 2021-12-30T06:33:14.31
IV.CASP.HHE. ML:1.5 0.0000791 0.18 AML other m 2021-12-30T06:33:18.67
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