Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 20-11-2021 and time 05:25:33 (UTC) in region Costa Toscana livornese (Livorno)

A magnitude ML 2.1 earthquake occured in region: Costa Toscana livornese (Livorno), on

  • 20-11-2021 05:25:33 (UTC)
  • 20-11-2021 06:25:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4510, 10.2280 at 15 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
Livorno LI 13 159219 159219

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Livorno (159219 inhabitants)
33 Km SW of Pisa (89158 inhabitants)
46 Km S of Viareggio (62467 inhabitants)
49 Km SW of Lucca (89046 inhabitants)
66 Km S of Massa (69479 inhabitants)
71 Km S of Carrara (63133 inhabitants)
77 Km SW of Pistoia (90315 inhabitants)
80 Km SE of La Spezia (93959 inhabitants)
84 Km W of Scandicci (50609 inhabitants)
85 Km SW of Prato (191150 inhabitants)
90 Km W of Firenze (382808 inhabitants)
91 Km W of Siena (53903 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 2.1 2021-11-20
05:25:33		 43.4507 10.2282 15 2022-03-30
13:04:20		 Bollettino Sismico Italiano INGV 98249001
Reviewed
Rev100 		ML 2.1 2021-11-20
05:25:33		 43.4668 10.2593 5 2021-11-20
05:41:14		 Sala Sismica INGV-Roma 97615951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-20 05:25:33 ± 0.11
Latitude 43.4507 ± 0.0054
Longitude 10.2282 ± 0.0099
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98249001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 839
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 840.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.25811
Epicentral distance of station farthest from the epicenter (degree) 1.27254
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 98249001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-24 13:49:02

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 97615951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-20 05:41:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CASP.HHZ. 2021-11-20T05:25:59.99 0.6 undecidable manual S 145 89.5437 93 -0.08 45
GU.EQUI.HHN. 2021-11-20T05:25:57.39 0.6 undecidable manual S 356 79.5648 94 -0.03 46
GU.SARM.EHN. 2021-11-20T05:25:57.88 0.6 undecidable manual S 10 82.5507 93 -0.32 43
IV.CELB.HHZ. 2021-11-20T05:25:56.80 0.6 undecidable manual S 181 78.0663 94 -0.22 44
GU.POPM.HHZ. 2021-11-20T05:25:56.80 0.6 undecidable manual S 33 78.366 94 -0.29 44
IV.CRMI.HHZ. 2021-11-20T05:25:55.30 0.6 undecidable manual S 57 71.4729 94 0.05 47
IV.ZCCA.HNN. 2021-11-20T05:25:55.21 0.3 undecidable manual P 31 116.3946 92 2.16 22
IV.BDI.HHZ. 2021-11-20T05:25:55.56 0.6 undecidable manual S 23 74.0703 94 -0.37 44
IV.PLMA.HHZ. 2021-11-20T05:25:55.36 0.6 undecidable manual S 336 72.9714 94 -0.28 44
RD.PGF.BHZ. 2021-11-20T05:25:55.69 0.3 undecidable manual P 225 141.2475 92 -1.19 39
GU.CARD.HHZ. 2021-11-20T05:25:53.95 0.6 undecidable manual S 18 66.9774 94 -0.12 47
GU.GRAM.HHZ. 2021-11-20T05:25:53.61 0.6 undecidable manual P 354 116.0949 92 0.61 38
IV.ERBM.EHE. 2021-11-20T05:25:52.85 0.1 undecidable manual P 8 108.5136 92 1.02 65
IV.FNVD.HHZ. 2021-11-20T05:25:52.05 0.3 undecidable manual P 42 107.0151 93 0.44 61
IV.TRIF.CHZ. 2021-11-20T05:25:52.98 0.6 undecidable manual S 124 65.9895 94 -0.82 38
IV.MSSA.HHZ. 2021-11-20T05:25:52.46 0.3 undecidable manual P 330 111.5994 92 0.15 65
GU.GSCL.HHZ. 2021-11-20T05:25:51.96 0.3 undecidable manual P 16 103.9182 93 0.83 53
GU.MAIM.HHZ. 2021-11-20T05:25:50.40 0.6 undecidable manual S 22 55.5 96 -0.6 42
IV.MOCL.EHZ. 2021-11-20T05:25:50.62 0.3 undecidable manual P 51 98.0241 93 0.39 62
IV.MPPT.EHN. 2021-11-20T05:25:49.20 0.3 undecidable manual P 51 89.1441 93 0.35 64
IV.RIBO.EHZ. 2021-11-20T05:25:48.86 0.1 undecidable manual P 130 86.4468 93 0.42 85
IV.CASP.HHZ. 2021-11-20T05:25:48.99 0.1 undecidable manual P 145 89.5437 93 0.07 91
IV.FROS.CHZ. 2021-11-20T05:25:47.63 0.3 undecidable manual P 109 79.5648 94 0.26 67
GU.POPM.HHZ. 2021-11-20T05:25:47.50 0.1 positive manual P 33 78.366 94 0.3 88
GU.EQUI.HHN. 2021-11-20T05:25:47.25 0.3 undecidable manual P 356 79.5648 94 -0.14 67
GU.SARM.EHN. 2021-11-20T05:25:47.82 0.1 undecidable manual P 10 82.5507 93 -0.02 92
IV.PLMA.HHZ. 2021-11-20T05:25:46.04 0.1 undecidable manual P 336 72.9714 94 -0.32 87
IV.CRMI.HHZ. 2021-11-20T05:25:46.70 0.1 undecidable manual P 57 71.4729 94 0.56 83
IV.CELB.HHZ. 2021-11-20T05:25:46.98 0.3 undecidable manual P 181 78.0663 94 -0.18 67
IV.BDI.HHZ. 2021-11-20T05:25:46.50 0.1 undecidable manual P 23 74.0703 94 -0.03 93
IV.MAGO.CHZ. 2021-11-20T05:25:46.60 0.6 undecidable manual S 119 39.8268 99 -0.26 48
IV.PII.HHZ. 2021-11-20T05:25:45.55 0.3 undecidable manual S 38 38.4282 99 -0.93 57
IV.TRIF.CHZ. 2021-11-20T05:25:45.22 0.3 undecidable manual P 124 65.9895 94 -0.08 71
GU.CARD.HHZ. 2021-11-20T05:25:45.26 0.3 undecidable manual P 18 66.9774 94 -0.19 69
VR.VRG02.HH2. 2021-11-20T05:25:44.96 0.6 undecidable manual S 45 32.6451 102 0.01 51
VR.VRG01.HH2. 2021-11-20T05:25:44.16 0.6 undecidable manual S 48 29.9478 103 -0.1 50
VR.VRG03.HH3. 2021-11-20T05:25:44.06 0.6 undecidable manual S 43 28.6491 104 0.14 50
GU.MAIM.HHZ. 2021-11-20T05:25:43.51 0.1 undecidable manual P 22 55.5 96 -0.17 94
IV.MAGO.CHZ. 2021-11-20T05:25:41.14 0.3 undecidable manual P 119 39.8268 99 -0.15 73
IV.PII.HHZ. 2021-11-20T05:25:40.64 0.1 positive manual P 38 38.4282 99 -0.43 92
VR.VRG02.HH2. 2021-11-20T05:25:40.22 0.3 undecidable manual P 45 32.6451 102 0.03 76
VR.VRG03.HH3. 2021-11-20T05:25:39.48 0.1 undecidable manual P 43 28.6491 104 -0.11 100
VR.VRG01.HH2. 2021-11-20T05:25:39.75 0.3 undecidable manual P 48 29.9478 103 -0.04 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:2.4 0.000801 0.3 AML other m 2021-11-20T05:25:46.57
IV.PII.HHN. ML:2.3 0.0006820000000000001 0.86 AML other m 2021-11-20T05:25:47.49
IV.MAGO.CHN. ML:2.1 0.000395 0.1 AML other m 2021-11-20T05:25:48.41
IV.MAGO.CHE. ML:2.3 0.00063740965 1.4976 AML other m 2021-11-20T05:25:50.76
IV.CRMI.HHN. ML:1.4 0.00004189878 1.68 AML other m 2021-11-20T05:25:55.04
IV.PLMA.HHE. ML:1.7 0.00008065 0.98 AML other m 2021-11-20T05:25:55.89
GU.CARD.HHE. ML:2.2 0.00029000000000000006 1.74 AML other m 2021-11-20T05:25:56.90
GU.CARD.HHN. ML:2.4 0.000391 0.98 AML other m 2021-11-20T05:25:56.43
IV.BDI.HHE. ML:2.2 0.00023099999999999998 0.22 AML other m 2021-11-20T05:25:57.65
IV.BDI.HNE. ML:2.2 0.000244 0.22 AML other m 2021-11-20T05:25:57.65
IV.PLMA.HHN. ML:1.7 0.0000863 0.6 AML other m 2021-11-20T05:25:57.59
IV.BDI.HHN. ML:2.2 0.00027249999999999996 0.4 AML other m 2021-11-20T05:25:58.10
IV.BDI.HNN. ML:2.3 0.0002785 0.4 AML other m 2021-11-20T05:25:58.11
IV.CELB.HHN. ML:1.9 0.000117 0.92 AML other m 2021-11-20T05:25:58.54
GU.POPM.HHN. ML:2.1 0.00019700000000000002 1.02 AML other m 2021-11-20T05:25:59.54
IV.CELB.HHE. ML:1.9 0.00011399999999999999 1.08 AML other m 2021-11-20T05:25:59.02
GU.POPM.HHE. ML:2.3 0.00026649999999999997 0.2 AML other m 2021-11-20T05:25:59.68
IV.CASP.HHN. ML:2.0 0.00011 0.36 AML other m 2021-11-20T05:26:01.49
IV.CASP.HHE. ML:1.9 0.00008945 1.48 AML other m 2021-11-20T05:26:01.75
GU.GSCL.HHN. ML:2.4 0.0002195 0.24 AML other m 2021-11-20T05:26:06.55
GU.GSCL.HHE. ML:2.6 0.0003885 1.7 AML other m 2021-11-20T05:26:08.12
GU.GRAM.HHE. ML:2.1 0.00009566389 0.72 AML other m 2021-11-20T05:26:11.39
GU.GRAM.HHN. ML:2.2 0.00011495865 0.6816 AML other m 2021-11-20T05:26:11.26
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
Waveforms Seismic signals in miniseed + resp format Download