Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 06-02-2022 and time 04:38:31 (Italy) in region 9 km S Viareggio (LU)

A magnitude ML 1.8 earthquake occured in region: 9 km S Viareggio (LU), on

  • 06-02-2022 03:38:31 (UTC)
  • 06-02-2022 04:38:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7900, 10.2750 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
Viareggio LU 9 62467 62467
Vecchiano PI 9 12189 74656
Massarosa LU 10 22471 97127
Pisa PI 13 89158 186285
San Giuliano Terme PI 14 31399 217684
Camaiore LU 17 32513 250197
Lucca LU 19 89046 339243
Pietrasanta LU 19 24007 363250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km S of Viareggio (62467 inhabitants)
13 Km NW of Pisa (89158 inhabitants)
19 Km W of Lucca (89046 inhabitants)
27 Km N of Livorno (159219 inhabitants)
30 Km SE of Massa (69479 inhabitants)
35 Km SE of Carrara (63133 inhabitants)
50 Km SE of La Spezia (93959 inhabitants)
54 Km W of Pistoia (90315 inhabitants)
67 Km W of Prato (191150 inhabitants)
73 Km W of Scandicci (50609 inhabitants)
79 Km W of Firenze (382808 inhabitants)
100 Km NW 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 1.8 2022-02-06
03:38:31		 43.7903 10.275 8 2022-07-08
12:33:50		 Bollettino Sismico Italiano INGV 103901001
Reviewed
Rev100 		ML 1.8 2022-02-06
03:38:30		 43.7858 10.2505 0 2022-02-06
03:49:02		 Sala Sismica INGV-Roma 100642121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-02-06 03:38:31 ± 0.15
Latitude 43.7903 ± 0.0045
Longitude 10.2750 ± 0.0087
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 103901001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 640
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 39
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.08728
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 103901001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-28 14:58:08

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 100642121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-02-06 03:49:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMP.HHZ. 2022-02-06T03:39:47.66 3.0 undecidable manual Sn 0.37 0
IV.VARE.HHZ. 2022-02-06T03:39:45.96 3.0 undecidable manual Sg 2.1 0
IV.FROS.CHE. 2022-02-06T03:38:59.83 0.6 undecidable manual S 132 95.8263 50 0.01 44
GU.GRAM.HHZ. 2022-02-06T03:38:56.12 0.6 undecidable manual S 348 79.4649 50 0.66 38
IV.ERBM.EHE. 2022-02-06T03:38:53.62 0.6 undecidable manual S 9 70.6737 50 0.51 41
GU.GSCL.HHZ. 2022-02-06T03:38:52.51 0.6 undecidable manual S 22 66.9774 50 0.38 43
IV.MPPT.EHZ. 2022-02-06T03:38:52.15 0.6 undecidable manual S 74 67.7766 50 -0.2 44
IV.CASP.HHZ. 2022-02-06T03:38:51.09 0.3 undecidable manual P 157 120.6903 50 -0.4 57
IV.CELB.HHZ. 2022-02-06T03:38:50.26 0.3 undecidable manual P 183 115.8951 50 -0.49 57
IV.MAGO.CHZ. 2022-02-06T03:38:50.82 0.6 undecidable manual S 152 65.0904 50 -0.81 37
IV.CRMI.HHZ. 2022-02-06T03:38:48.84 0.6 undecidable manual S 89 56.3991 50 -0.47 43
IV.FROS.CHE. 2022-02-06T03:38:48.34 0.3 undecidable manual P 132 95.8263 50 0.69 55
IV.SEI.HHZ. 2022-02-06T03:38:47.39 0.3 undecidable manual P 71 91.4418 50 0.42 61
GU.FIVI.HNE. 2022-02-06T03:38:47.71 0.6 undecidable manual S 347 51.2154 50 -0.21 46
IV.MSSA.HHZ. 2022-02-06T03:38:46.04 0.3 undecidable manual P 314 83.9493 50 0.21 64
IV.TRIF.CHZ. 2022-02-06T03:38:46.99 0.3 undecidable manual P 146 90.4428 50 0.17 64
GU.POPM.HHZ. 2022-02-06T03:38:46.75 0.3 undecidable manual S 54 47.7189 50 -0.25 68
IV.OSSC.HHZ. 2022-02-06T03:38:46.41 0.3 undecidable manual P 110 83.3499 50 0.68 57
GU.SARM.EHN. 2022-02-06T03:38:45.37 0.6 undecidable manual S 13 44.8218 50 -0.84 38
IV.MOCL.EHZ. 2022-02-06T03:38:45.08 0.3 undecidable manual P 71 76.1682 50 0.45 62
IV.PLMA.HHZ. 2022-02-06T03:38:45.19 0.6 undecidable manual S 311 44.3223 50 -0.89 37
GU.GRAM.HHZ. 2022-02-06T03:38:45.68 0.1 undecidable manual P 348 79.4649 50 0.55 80
IV.ERBM.EHE. 2022-02-06T03:38:44.54 0.1 undecidable manual P 9 70.6737 50 0.76 74
GU.EQUI.HHZ. 2022-02-06T03:38:44.47 0.6 undecidable manual S 347 42.8238 50 -1.21 32
IV.BDI.HHZ. 2022-02-06T03:38:44.54 0.6 undecidable manual S 40 39.627 50 -0.29 46
IV.MPPT.EHZ. 2022-02-06T03:38:43.63 0.3 undecidable manual P 74 67.7766 50 0.3 65
IV.MAGO.CHZ. 2022-02-06T03:38:43.00 0.1 undecidable manual P 152 65.0904 50 0.08 91
GU.GSCL.HHZ. 2022-02-06T03:38:43.57 0.1 undecidable manual P 22 66.9774 50 0.36 86
IV.CRMI.HHZ. 2022-02-06T03:38:41.79 0.1 undecidable manual P 89 56.3991 50 0.21 91
GU.CARD.HHZ. 2022-02-06T03:38:41.81 0.3 undecidable manual S 32 30.9468 104 -0.27 70
GU.POPM.HHZ. 2022-02-06T03:38:40.25 0.1 undecidable manual P 54 47.7189 50 0 96
GU.FIVI.HNE. 2022-02-06T03:38:40.86 0.3 undecidable manual P 347 51.2154 50 0.08 70
GU.MAIM.HHZ. 2022-02-06T03:38:39.02 0.3 undecidable manual S 52 22.0668 109 -0.09 74
GU.EQUI.HHZ. 2022-02-06T03:38:39.05 0.1 undecidable manual P 347 42.8238 50 -0.43 88
GU.SARM.EHN. 2022-02-06T03:38:39.62 0.1 undecidable manual P 13 44.8218 50 -0.17 93
IV.PLMA.HHZ. 2022-02-06T03:38:39.59 0.3 undecidable manual P 311 44.3223 50 -0.12 71
IV.PII.HHZ. 2022-02-06T03:38:38.43 0.3 undecidable manual S 111 21.4674 110 -0.48 68
IV.BDI.HHZ. 2022-02-06T03:38:38.69 0.1 undecidable manual P 40 39.627 50 -0.3 91
GU.CARD.HHZ. 2022-02-06T03:38:37.22 0.1 undecidable manual P 32 30.9468 104 -0.19 95
IV.PII.HHZ. 2022-02-06T03:38:35.55 0.1 undecidable manual P 111 21.4674 110 -0.03 100
GU.MAIM.HHZ. 2022-02-06T03:38:35.92 0.1 undecidable manual P 52 22.0668 109 0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:1.6 0.00027 0.74 AML other m 2022-02-06T03:38:38.57
IV.PII.HHN. ML:1.6 0.0002705 0.42 AML other m 2022-02-06T03:38:39.53
GU.MAIM.HHN. ML:1.7 0.00035099999999999997 0.16 AML other m 2022-02-06T03:38:39.61
GU.MAIM.HHE. ML:1.5 0.000229 0.82 AML other m 2022-02-06T03:38:39.75
GU.CARD.HHE. ML:2.2 0.000742 0.82 AML other m 2022-02-06T03:38:42.69
GU.CARD.HHN. ML:2.4 0.001129 0.46 AML other m 2022-02-06T03:38:42.34
IV.BDI.HHN. ML:1.9 0.0003005 0.44 AML other m 2022-02-06T03:38:44.66
IV.BDI.HHE. ML:1.9 0.00028849999999999997 0.46 AML other m 2022-02-06T03:38:44.67
GU.EQUI.HHN. ML:1.5 0.00009655 0.36 AML other m 2022-02-06T03:38:45.31
GU.EQUI.HHE. ML:1.3 0.000064 0.48 AML other m 2022-02-06T03:38:45.48
GU.POPM.HHN. ML:1.9 0.00020800000000000001 1.56 AML other m 2022-02-06T03:38:47.13
GU.POPM.HHE. ML:1.8 0.000168 1.38 AML other m 2022-02-06T03:38:48.11
IV.CRMI.HHE. ML:1.1 0.0000309 0.8 AML other m 2022-02-06T03:38:50.34
IV.CRMI.HHN. ML:1.1 0.0000309 1.54 AML other m 2022-02-06T03:38:51.13
IV.MAGO.CHN. ML:1.5 0.000057999999999999994 0.88 AML other m 2022-02-06T03:38:52.00
IV.MAGO.CHE. ML:1.5 0.0000528 0.42 AML other m 2022-02-06T03:38:52.72
IV.CELB.HHE. ML:1.5 0.0000235 1.56 AML other m 2022-02-06T03:38:53.07
GU.GSCL.HHN. ML:2.0 0.0001865 0.84 AML other m 2022-02-06T03:38:53.50
GU.GSCL.HHE. ML:2.0 0.000183 0.22 AML other m 2022-02-06T03:38:55.16
IV.CELB.HHN. ML:1.4 0.000018200000000000002 1.58 AML other m 2022-02-06T03:38:56.88
GU.GRAM.HHN. ML:2.0 0.0001265 1.32 AML other m 2022-02-06T03:38:57.02
IV.MOCL.EHN. ML:1.7 0.00007350000000000001 1.18 AML other m 2022-02-06T03:38:57.70
IV.MOCL.EHE. ML:1.8 0.00009635000000000001 0.74 AML other m 2022-02-06T03:38:57.89
GU.GRAM.HHE. ML:2.0 0.000123 0.2 AML other m 2022-02-06T03:38:58.60
IV.MSSA.HHN. ML:2.1 0.000157 0.74 AML other m 2022-02-06T03:38:58.85
IV.MSSA.HHE. ML:2.2 0.000189 1.9 AML other m 2022-02-06T03:38:59.96
IV.SEI.HHN. ML:2.0 0.0001052 0.38 AML other m 2022-02-06T03:39:02.58
IV.SEI.HHE. ML:1.7 0.0000598 0.48 AML other m 2022-02-06T03:39:03.31
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