Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 07-04-2024 and time 02:04:38 (Italy) in region 5 km NW Viareggio (LU)

A magnitude ML 0.9 earthquake occured in region: 5 km NW Viareggio (LU), on

  • 07-04-2024 00:04:38 (UTC)
  • 07-04-2024 02:04:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9070, 10.2170 at 10 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.

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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 5 62467 62467
Pietrasanta LU 6 24007 86474
Forte dei Marmi LU 7 7510 93984
Camaiore LU 8 32513 126497
Seravezza LU 10 13073 139570
Massarosa LU 11 22471 162041
Stazzema LU 12 3193 165234
Montignoso MS 13 10323 175557
Massa MS 16 69479 245036
Pescaglia LU 17 3526 248562
Vecchiano PI 20 12189 260751

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km NW of Viareggio (62467 inhabitants)
16 Km SE of Massa (69479 inhabitants)
21 Km SE of Carrara (63133 inhabitants)
24 Km W of Lucca (89046 inhabitants)
26 Km NW of Pisa (89158 inhabitants)
38 Km SE of La Spezia (93959 inhabitants)
40 Km N of Livorno (159219 inhabitants)
56 Km W of Pistoia (90315 inhabitants)
71 Km W of Prato (191150 inhabitants)
79 Km W of Scandicci (50609 inhabitants)
85 Km W of Firenze (382808 inhabitants)
94 Km SW of Reggio nell'Emilia (171345 inhabitants)
100 Km SW of Modena (184973 inhabitants)
100 Km S of Parma (192836 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
Reviewed
Rev100 		ML 0.9 2024-04-07
00:04:38		 43.9072 10.2168 10 2024-04-07
00:11:37		 Sala Sismica INGV-Roma 126534761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-07 00:04:38 ± 0.22
Latitude 43.9072 ± 0.0081
Longitude 10.2168 ± 0.0125
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126534761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 934
Semi-minor axis of confidence ellipse (meter) 812
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 930.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31386
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 126534761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-07 00:11:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.SARM.EHE. 2024-04-07T00:04:50.19 0.3 undecidable manual S 25 34.0437 50 -0.17 75
IV.BDI.HHZ. 2024-04-07T00:04:50.86 0.3 undecidable manual S 60 34.8429 50 0.29 73
IV.PII.HHZ. 2024-04-07T00:04:49.41 0.3 undecidable manual S 130 32.1456 50 -0.44 71
MN.VLC.HHZ. 2024-04-07T00:04:49.32 0.3 undecidable manual S 26 31.0467 50 -0.25 74
GU.CARD.HHZ. 2024-04-07T00:04:47.44 0.3 undecidable manual S 58 24.9528 112 -0.42 72
GU.POPM.HHZ. 2024-04-07T00:04:47.80 3.0 negative manual P -0.27 0
GU.MAIM.HHZ. 2024-04-07T00:04:46.66 0.3 undecidable manual S 88 21.9669 114 -0.24 75
MN.VLC.HHZ. 2024-04-07T00:04:45.25 0.3 undecidable manual P 26 31.0467 50 0.34 73
IV.PII.HHZ. 2024-04-07T00:04:45.29 0.3 undecidable manual P 130 32.1456 50 0.22 75
GU.SARM.EHE. 2024-04-07T00:04:45.72 1.0 undecidable manual P 25 34.0437 50 0.35 24
IV.BDI.HHZ. 2024-04-07T00:04:45.92 0.3 undecidable manual P 60 34.8429 50 0.43 71
GU.CARD.HHZ. 2024-04-07T00:04:44.17 0.1 undecidable manual P 58 24.9528 112 0.25 100
GU.EQUI.HHZ. 2024-04-07T00:04:44.50 0.3 undecidable manual P 350 29.1486 50 -0.12 77
IV.PLMA.HHZ. 2024-04-07T00:04:44.87 0.3 undecidable manual P 299 33.0447 50 -0.34 72
GU.MAIM.HHZ. 2024-04-07T00:04:43.74 0.6 undecidable manual P 88 21.9669 114 0.37 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CARD.HHN. ML:1.1 0.00007364999999999999 0.28 AML other m 2024-04-07T00:04:48.21
GU.CARD.HHE. ML:1.0 0.00006175 0.42 AML other m 2024-04-07T00:04:49.36
IV.BDI.HHE. ML:1.0 0.00003895 0.32 AML other m 2024-04-07T00:04:51.22
IV.BDI.HHN. ML:0.8 0.0000262 0.56 AML other m 2024-04-07T00:04:53.04
MN.VLC.HHE. ML:0.6 0.000018553960000000003 0.1 AML other m 2024-04-07T00:04:49.59
MN.VLC.HHN. ML:0.8 0.00002816031 0.14 AML other m 2024-04-07T00:04:49.52
IV.PII.HHE. ML:0.9 0.000036271495 0.32 AML other m 2024-04-07T00:04:49.85
IV.PII.HHN. ML:0.6 0.000020463354500000004 0.2 AML other m 2024-04-07T00:04:50.30
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