Earthquake with magnitude of ML 1.3 on date 17-04-2018 and time 11:07:02 (Italy) in region 5 km SW Massarosa (LU)

A magnitude ML 1.3 earthquake occured in region: 5 km SW Massarosa (LU), on

  • 17-04-2018 09:07:02 (UTC)
  • 17-04-2018 11:07:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.83, 10.32 at 4 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
Massarosa LU 5 22471 22471
Viareggio LU 7 62467 84938
Vecchiano PI 8 12189 97127
Camaiore LU 13 32513 129640
San Giuliano Terme PI 13 31399 161039
Pisa PI 14 89158 250197
Lucca LU 15 89046 339243
Pietrasanta LU 16 24007 363250
Pescaglia LU 17 3526 366776
Forte dei Marmi LU 19 7510 374286
Stazzema LU 19 3193 377479
Calci PI 20 6426 383905
Seravezza LU 20 13073 396978

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km SE of Viareggio (62467 inhabitants)
14 Km NW of Pisa (89158 inhabitants)
15 Km W of Lucca (89046 inhabitants)
27 Km SE of Massa (69479 inhabitants)
31 Km N of Livorno (159219 inhabitants)
33 Km SE of Carrara (63133 inhabitants)
50 Km SE of La Spezia (93959 inhabitants)
50 Km W of Pistoia (90315 inhabitants)
63 Km W of Prato (191150 inhabitants)
70 Km W of Scandicci (50609 inhabitants)
76 Km W of Firenze (382808 inhabitants)
100 Km NW of Siena (53903 inhabitants)
100 Km S of Reggio nell'Emilia (171345 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
Rev 1000 ML 1.3 2018-04-17
09:07:02
43.83 10.32 4 2019-04-24
14:49:48
Bollettino Sismico Italiano INGV 65949031
Rev 100 ML 1.3 2018-04-17
09:07:02
43.83 10.31 4 2018-04-17
09:18:05
Sala Sismica INGV-Roma 55729611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-17 09:07:02 ± 0.13
Latitude 43.83 ± 0.01
Longitude 10.32 ± 0.01
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 65949031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 670
Semi-minor axis of confidence ellipse (meter) 221
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 223
Circular confidence region, given by single value of horizontal uncertainty (meter) 670
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 179
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.15378
Epicentral distance of station farthest from the epicenter (degree) 0.73834
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 65949031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-25 12:37:10

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 55729611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-04-17 09:18:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.OSSC.HNN. 2018-04-17T09:07:17.54 0.6 undecidable manual P 114 0.7383 50 0.13 44
IV.PLMA.HHZ. 2018-04-17T09:07:17.38 0.3 undecidable manual S 304 0.3993 95 -0.46 66
GU.EQUI.HHZ. 2018-04-17T09:07:15.48 0.6 undecidable manual S 341 0.3579 95 -0.76 40
MN.VLC.HHZ. 2018-04-17T09:07:15.59 0.6 undecidable manual S 9 0.3354 96 0.2 47
GU.GSCL.HHE. 2018-04-17T09:07:14.50 0.3 undecidable manual P 20 0.5585 50 0.17 68
IV.MTCR.EHE. 2018-04-17T09:07:13.79 0.3 undecidable manual P 68 0.5342 50 -0.12 69
IV.BDI.HHZ. 2018-04-17T09:07:13.83 0.3 undecidable manual S 41 0.3103 96 -0.58 65
IV.CRMI.HHZ. 2018-04-17T09:07:12.79 0.3 undecidable manual P 94 0.4802 50 -0.21 68
GU.CARD.HHZ. 2018-04-17T09:07:11.47 0.3 undecidable manual S 31 0.232 98 0.04 74
IV.PLMA.HHZ. 2018-04-17T09:07:11.70 0.1 undecidable manual P 304 0.3993 95 0.38 89
GU.EQUI.HHZ. 2018-04-17T09:07:10.50 0.1 undecidable manual P 341 0.3579 95 0.11 96
MN.VLC.HHZ. 2018-04-17T09:07:10.00 0.3 undecidable manual P 9 0.3354 96 0.1 72
GU.SARM.EHZ. 2018-04-17T09:07:10.40 0.1 undecidable manual P 10 0.3615 95 -0.08 96
IV.PII.HHZ. 2018-04-17T09:07:09.22 0.3 undecidable manual S 125 0.1844 100 -0.41 70
IV.BDI.HHZ. 2018-04-17T09:07:09.28 0.1 undecidable manual P 41 0.3103 96 -0.05 98
GU.MAIM.HHZ. 2018-04-17T09:07:08.61 0.6 undecidable manual S 56 0.1538 102 0.15 49
GU.CARD.HHZ. 2018-04-17T09:07:07.87 0.1 undecidable manual P 31 0.232 98 0.26 95
GU.MAIM.HHZ. 2018-04-17T09:07:06.35 0.1 undecidable manual P 56 0.1538 102 0.45 92
IV.PII.HHZ. 2018-04-17T09:07:06.63 0.1 undecidable manual P 125 0.1844 100 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.MAIM.HHE. ML:1.4 0.0002795 1.58 AML other m 2018-04-17T09:07:08.97
GU.MAIM.HHN. ML:1.4 0.0002695 0.7 AML other m 2018-04-17T09:07:09.07
IV.PII.HHN. ML:1.3 0.0001645 0.54 AML other m 2018-04-17T09:07:10.70
IV.PII.HHE. ML:1.4 0.000202 0.18 AML other m 2018-04-17T09:07:10.47
GU.CARD.HHE. ML:1.7 0.000295 0.18 AML other m 2018-04-17T09:07:11.71
GU.CARD.HHN. ML:1.8 0.000396 0.32 AML other m 2018-04-17T09:07:12.07
IV.BDI.HHN. ML:0 6.655E-5 0.28 AML other m 2018-04-17T09:07:14.83
GU.EQUI.HHE. ML:1 3.675531E-5 0.16 AML other m 2018-04-17T09:07:15.77
GU.EQUI.HHN. ML:1 3.844544E-5 1.9232 AML other m 2018-04-17T09:07:15.01
IV.BDI.HHE. ML:1.1 5.3E-5 0.6 AML other m 2018-04-17T09:07:17.15
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download