Earthquake with magnitude of ML 1.9 on date 23-04-2021 and time 04:42:00 (Italy) in region 3 km NE Castelnuovo di Val di Cecina (PI)

A magnitude ML 1.9 earthquake occured in region: 3 km NE Castelnuovo di Val di Cecina (PI), on

  • 23-04-2021 02:42:00 (UTC)
  • 23-04-2021 04:42:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.227, 10.936 at 7 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
Castelnuovo di Val di Cecina PI 3 2231 2231
Radicondoli SI 10 914 3145
Pomarance PI 10 5897 9042
Monterotondo Marittimo GR 11 1371 10413
Montieri GR 13 1204 11617
Chiusdino SI 15 1903 13520
Casole d'Elsa SI 15 3897 17417
Monteverdi Marittimo PI 19 758 18175
Massa Marittima GR 20 8375 26550

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Siena (53903 inhabitants)
54 Km N of Grosseto (82087 inhabitants)
62 Km SE of Livorno (159219 inhabitants)
62 Km SW of Scandicci (50609 inhabitants)
66 Km SW of Firenze (382808 inhabitants)
69 Km SE of Pisa (89158 inhabitants)
74 Km S of Prato (191150 inhabitants)
77 Km SE of Lucca (89046 inhabitants)
79 Km S of Pistoia (90315 inhabitants)
81 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
Bulletin
Rev1000
ML 1.9 2021-04-23
02:42:00
43.227 10.936 7 2021-07-12
16:55:14
Bollettino Sismico Italiano INGV 90928981
Reviewed
Rev100
ML 1.8 2021-04-23
02:41:59
43.2158 10.9382 6 2021-04-23
02:53:34
Sala Sismica INGV-Roma 89382111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-23 02:42:00 ± 0.08
Latitude 43.2270 ± 0.0036
Longitude 10.9360 ± 0.0062
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90928981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 406
Semi-minor axis of confidence ellipse (meter) 348
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.11511
Epicentral distance of station farthest from the epicenter (degree) 1.15023
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 41
Type of magnitude ML
Reference to an origin 90928981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-08 09:30:19

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 89382111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-23 02:53:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
Z3.A317A.HHE. 2021-04-23T02:42:27.91 0.6 undecidable manual S 258 0.8166 50 0.31 41
IV.RUFI.EHZ. 2021-04-23T02:42:25.15 0.6 undecidable manual S 34 0.7383 50 -0.13 43
TV.SF03.EHN. 2021-04-23T02:42:24.26 0.6 undecidable manual S 127 0.6925 50 0.34 42
TV.SF14.HHN. 2021-04-23T02:42:23.52 0.6 undecidable manual S 133 0.6844 50 -0.15 43
TV.SF04.EHZ. 2021-04-23T02:42:23.53 0.6 undecidable manual S 126 0.6583 50 0.64 38
TV.SF13.HHN. 2021-04-23T02:42:22.16 0.6 undecidable manual S 129 0.6448 50 -0.35 42
TV.SF11.HHZ. 2021-04-23T02:42:22.55 0.6 undecidable manual S 123 0.6502 50 -0.11 44
GU.GSCL.HHZ. 2021-04-23T02:42:22.20 0.6 undecidable manual P 348 1.1502 50 0.54 36
TV.SF01.EHZ. 2021-04-23T02:42:21.81 0.3 undecidable manual S 132 0.6178 50 0.1 67
IV.PARC.HHZ. 2021-04-23T02:42:20.10 0.1 undecidable manual P 66 1.0351 50 0.42 76
IV.ARCI.HHZ. 2021-04-23T02:42:19.24 0.6 undecidable manual S 133 0.5441 50 -0.27 44
IV.PII.HHZ. 2021-04-23T02:42:19.83 0.6 undecidable manual S 329 0.5774 50 -0.68 39
IV.LMD.HHZ. 2021-04-23T02:42:19.89 0.1 negative manual P 33 1.0162 50 0.52 74
IV.SFI.EHZ. 2021-04-23T02:42:18.33 0.6 undecidable manual P 44 0.9452 50 0.18 41
IV.MGAB.HHZ. 2021-04-23T02:42:17.73 0.6 undecidable manual P 110 0.9146 50 0.11 42
IV.RONT.HHZ. 2021-04-23T02:42:17.12 0.3 undecidable manual P 25 0.8463 50 0.67 55
IV.SACS.HHZ. 2021-04-23T02:42:16.24 0.3 undecidable manual P 118 0.8049 50 0.49 59
GU.CARD.HHZ. 2021-04-23T02:42:16.20 0.6 undecidable manual P 338 0.8633 50 -0.55 38
Z3.A317A.HHE. 2021-04-23T02:42:16.37 0.6 undecidable manual P 258 0.8166 50 0.42 40
IV.RINC.HHZ. 2021-04-23T02:42:16.34 0.1 undecidable manual P 36 0.8184 50 0.35 81
IV.BDI.HHZ. 2021-04-23T02:42:16.84 0.1 undecidable manual P 344 0.8705 50 -0.04 85
IV.MOCL.EHZ. 2021-04-23T02:42:15.64 0.1 undecidable manual P 13 0.7977 50 0.02 87
IV.CELB.HHZ. 2021-04-23T02:42:14.73 0.3 undecidable manual P 228 0.715 50 0.51 60
IV.RUFI.EHZ. 2021-04-23T02:42:14.46 0.1 undecidable manual P 34 0.7383 50 -0.15 86
IV.CAFI.HHZ. 2021-04-23T02:42:14.78 0.1 positive manual P 82 0.7563 50 -0.14 86
TV.SF03.EHN. 2021-04-23T02:42:14.15 0.6 undecidable manual P 127 0.6925 50 0.32 42
IV.MCIV.CHZ. 2021-04-23T02:42:14.18 0.3 undecidable manual P 129 0.7024 50 0.18 65
IV.CSNT.HHZ. 2021-04-23T02:42:13.52 0.6 undecidable manual S 46 0.3561 50 -0.42 44
TV.SF11.HHZ. 2021-04-23T02:42:13.28 0.3 undecidable manual P 123 0.6502 50 0.18 65
TV.SF14.HHN. 2021-04-23T02:42:13.63 0.1 undecidable manual P 133 0.6844 50 -0.06 89
TV.SF01.EHZ. 2021-04-23T02:42:12.51 0.3 undecidable manual P 132 0.6178 50 -0.04 68
TV.SF04.EHZ. 2021-04-23T02:42:12.96 0.1 undecidable manual P 126 0.6583 50 -0.28 85
TV.SF13.HHN. 2021-04-23T02:42:12.84 0.1 undecidable manual P 129 0.6448 50 -0.17 87
IV.RIBO.EHZ.01 2021-04-23T02:42:11.49 0.6 undecidable manual S 164 0.2896 102 0.04 48
IV.ARCI.HHZ. 2021-04-23T02:42:11.43 0.1 undecidable manual P 133 0.5441 50 0.15 90
IV.PII.HHZ. 2021-04-23T02:42:11.47 0.1 undecidable manual P 329 0.5774 50 -0.39 85
IV.MAGO.CHZ. 2021-04-23T02:42:09.01 0.6 undecidable manual S 283 0.2077 107 0.6 43
IV.CASP.HHZ. 2021-04-23T02:42:08.95 0.1 undecidable manual P 187 0.4389 50 -0.54 84
IV.FROS.CHZ. 2021-04-23T02:42:07.30 0.6 undecidable manual S 96 0.161 112 0.58 43
IV.CSNT.HHZ. 2021-04-23T02:42:07.27 0.1 undecidable manual P 46 0.3561 50 -0.8 77
IV.RIBO.EHZ.01 2021-04-23T02:42:06.17 0.1 undecidable manual P 164 0.2896 102 -0.46 88
IV.TRIF.CHZ. 2021-04-23T02:42:05.11 0.6 undecidable manual S 192 0.1151 119 0.01 50
IV.MAGO.CHZ. 2021-04-23T02:42:04.73 0.1 negative manual P 283 0.2077 107 -0.14 96
IV.FROS.CHZ. 2021-04-23T02:42:03.61 0.1 negative manual P 96 0.161 112 -0.29 94
IV.TRIF.CHZ. 2021-04-23T02:42:02.94 0.1 positive manual P 192 0.1151 119 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:2.8 0.0074918665 0.216 AML other m 2021-04-23T02:42:05.28
IV.TRIF.CHN. ML:2.6 0.005015332 0.112 AML other m 2021-04-23T02:42:05.30
IV.MAGO.CHE. ML:2.5 0.002175 0.08 AML other m 2021-04-23T02:42:08.18
IV.FROS.CHE. ML:2.2 0.0014808625 0.096 AML other m 2021-04-23T02:42:08.44
IV.MAGO.CHN. ML:2.3 0.0013236795 0.224 AML other m 2021-04-23T02:42:09.06
IV.FROS.CHN. ML:2.2 0.0012976665 0.288 AML other m 2021-04-23T02:42:10.10
IV.RIBO.EHE.01 ML:2.4 0.0012382125 0.16 AML other m 2021-04-23T02:42:11.50
IV.CSNT.HHE. ML:1.8 0.00023619045 0.1184 AML other m 2021-04-23T02:42:12.72
IV.CSNT.HHN. ML:1.9 0.00030988365 0.16 AML other m 2021-04-23T02:42:13.60
IV.CASP.HHE. ML:1.8 0.0001857062 0.1408 AML other m 2021-04-23T02:42:15.44
IV.CASP.HHN. ML:1.9 0.0002184541 0.2 AML other m 2021-04-23T02:42:16.48
IV.ARCI.HHE. ML:1.8 0.000140066 0.2 AML other m 2021-04-23T02:42:19.58
IV.ARCI.HHN. ML:1.7 9.2738735E-5 0.24 AML other m 2021-04-23T02:42:19.57
IV.PII.HHN. ML:2.4 0.0004515 0.28 AML other m 2021-04-23T02:42:20.77
IV.PII.HHE. ML:2.1 0.00025865675 0.3008 AML other m 2021-04-23T02:42:21.34
IV.ARCI.HNN. ML:2 0.00020444185 0.3488 AML other m 2021-04-23T02:42:22.02
TV.SF01.EHN. ML:2.4 0.0004005 0.32 AML other m 2021-04-23T02:42:22.16
TV.SF01.EHE. ML:2.5 0.0005285 0.26 AML other m 2021-04-23T02:42:22.15
IV.ARCI.HNE. ML:1.8 0.00014696156 0.3008 AML other m 2021-04-23T02:42:22.45
TV.SF04.EHE. ML:2.3 0.0003185 0.2 AML other m 2021-04-23T02:42:23.56
TV.SF04.EHN. ML:2.3 0.0002898774 0.2784 AML other m 2021-04-23T02:42:24.66
IV.MCIV.CHN. ML:1.6 6.18E-5 1.02 AML other m 2021-04-23T02:42:25.69
IV.RUFI.EHN. ML:1.8 7.8020205E-5 0.5792 AML other m 2021-04-23T02:42:27.30
IV.RUFI.EHE. ML:1.8 7.8939835E-5 0.3408 AML other m 2021-04-23T02:42:27.18
IV.MCIV.CHE. ML:1.7 6.95E-5 0.58 AML other m 2021-04-23T02:42:28.56
IV.RINC.HHE. ML:1.6 5.125748E-5 0.2416 AML other m 2021-04-23T02:42:28.74
GU.CARD.HHN. ML:1.8 7.595E-5 1.38 AML other m 2021-04-23T02:42:31.16
GU.CARD.HHE. ML:1.8 7.405E-5 0.54 AML other m 2021-04-23T02:42:31.19
IV.RONT.HHN. ML:2.3 0.000227 0.22 AML other m 2021-04-23T02:42:31.47
IV.BDI.HHE. ML:1.6 4.435E-5 1.38 AML other m 2021-04-23T02:42:31.24
IV.BDI.HHN. ML:1.6 4.185E-5 0.46 AML other m 2021-04-23T02:42:34.05
IV.RINC.HHN. ML:1.8 7.875E-5 0.42 AML other m 2021-04-23T02:42:34.39
IV.SFI.EHE. ML:1.6 4.22E-5 1.32 AML other m 2021-04-23T02:42:34.95
IV.SFI.EHN. ML:1.7 4.295E-5 1.38 AML other m 2021-04-23T02:42:34.96
IV.RONT.HHE. ML:2.3 0.0002125 0.48 AML other m 2021-04-23T02:42:35.65
IV.LMD.HHE. ML:1.6 3.655E-5 0.76 AML other m 2021-04-23T02:42:37.07
IV.LMD.HHN. ML:1.8 4.89E-5 0.46 AML other m 2021-04-23T02:42:37.75
IV.PARC.HHN. ML:1.6 3.29E-5 0.9 AML other m 2021-04-23T02:42:40.59
GU.GSCL.HHE. ML:1.8 4.035E-5 1.5 AML other m 2021-04-23T02:42:40.08
GU.GSCL.HHN. ML:1.6 2.79E-5 1.26 AML other m 2021-04-23T02:42:41.84
IV.PARC.HHE. ML:1.6 2.81E-5 0.64 AML other m 2021-04-23T02:42:45.44
GU.GRAM.HHN. ML:0 2.89E-5 0.64 AML other m 2021-04-23T02:42:50.59
GU.GRAM.HHE. ML:0 4.61E-5 1.66 AML other m 2021-04-23T02:42:51.06
IV.PTRJ.HNN. ML:0 0.000803 0.56 AML other m 2021-04-23T02:43:15.57
IV.PTRJ.HNE. ML:0 0.0003945 0.72 AML other m 2021-04-23T02:43:17.26
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