Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 12-05-2018 and time 06:40:39 (Italy) in region 2 km S Sarzana (SP)

A magnitude ML 1.4 earthquake occured in region: 2 km S Sarzana (SP), on

  • 12-05-2018 04:40:39 (UTC)
  • 12-05-2018 06:40:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0930, 9.9650 at 10 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
Sarzana SP 2 21976 21976
Ameglia SP 3 4365 26341
Castelnuovo Magra SP 4 8415 34756
Lerici SP 5 10228 44984
Arcola SP 5 10607 55591
Ortonovo SP 6 8277 63868
Fosdinovo MS 6 4883 68751
Vezzano Ligure SP 8 7356 76107
Santo Stefano di Magra SP 9 9360 85467
Carrara MS 11 63133 148600
La Spezia SP 11 93959 242559
Portovenere SP 11 3630 246189
Follo SP 11 6337 252526
Bolano SP 12 7813 260339
Podenzana MS 13 2180 262519
Aulla MS 13 11263 273782
Massa MS 16 69479 343261
Tresana MS 16 2044 345305
Riccò del Golfo di Spezia SP 18 3698 349003
Riomaggiore SP 18 1576 350579
Montignoso MS 19 10323 360902
Beverino SP 19 2429 363331
Calice al Cornoviglio SP 20 1138 364469

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km W of Carrara (63133 inhabitants)
11 Km E of La Spezia (93959 inhabitants)
16 Km W of Massa (69479 inhabitants)
34 Km NW of Viareggio (62467 inhabitants)
51 Km NW of Lucca (89046 inhabitants)
55 Km NW of Pisa (89158 inhabitants)
66 Km NW of Livorno (159219 inhabitants)
78 Km W of Pistoia (90315 inhabitants)
84 Km SW of Parma (192836 inhabitants)
86 Km SW of Reggio nell'Emilia (171345 inhabitants)
90 Km E of Genova (586655 inhabitants)
94 Km W of Prato (191150 inhabitants)
98 Km SW of Modena (184973 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 1.4 2018-05-12
04:40:39		 44.0932 9.9647 10 2019-04-24
14:51:10		 Bollettino Sismico Italiano INGV 66299891
Reviewed
Rev100 		ML 1.4 2018-05-12
04:40:38		 44.1027 9.9608 10 2018-05-12
05:00:32		 Sala Sismica INGV-Roma 56780061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-12 04:40:39 ± 0.1
Latitude 44.0932 ± 0.0090
Longitude 9.9647 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66299891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1009
Semi-minor axis of confidence ellipse (meter) 424
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 339
Circular confidence region, given by single value of horizontal uncertainty (meter) 1010.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 17
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) 0.54769
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 66299891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-08 15:58:00

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 56780061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-12 05:00:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LPEL.HHZ. 2018-05-12T04:42:18.55 3.0 undecidable manual Sn -6.18 0
IV.SRES.HHZ. 2018-05-12T04:42:02.05 3.0 undecidable manual Sg 3.31 0
IV.T1220.EHZ. 2018-05-12T04:42:00.48 3.0 undecidable manual Sg 6.17 0
IV.VVLD.HHZ. 2018-05-12T04:41:41.84 3.0 negative manual Pg 5.53 0
IV.MCIV.HHZ. 2018-05-12T04:41:13.75 3.0 positive manual Pg 0.28 0
IV.SARZ.HHZ. 2018-05-12T04:41:00.07 3.0 negative manual P -3.06 0
IV.MSSA.HHZ. 2018-05-12T04:40:52.78 0.6 undecidable manual S 305 43.3233 50 -0.69 41
MN.VLC.HHZ. 2018-05-12T04:40:50.45 0.6 undecidable manual S 77 34.3434 50 -0.63 43
GU.SARM.EHZ. 2018-05-12T04:40:50.89 0.6 undecidable manual S 74 36.1416 50 -0.66 42
IV.PII.HHZ. 2018-05-12T04:40:50.34 0.6 undecidable manual P 132 60.7947 50 0.23 46
GU.MAIM.HHZ. 2018-05-12T04:40:48.12 0.6 undecidable manual P 115 46.5201 50 0.22 47
IV.BDI.HHZ. 2018-05-12T04:40:48.60 0.3 undecidable manual P 94 50.4162 50 0.1 71
GU.GRAM.HHZ. 2018-05-12T04:40:48.12 0.1 positive manual P 10 44.9217 50 0.46 89
GU.CARD.HHZ. 2018-05-12T04:40:47.14 0.3 undecidable manual P 100 41.9247 50 -0.06 73
IV.MSSA.HHZ. 2018-05-12T04:40:47.52 0.3 undecidable manual P 305 43.3233 50 0.1 72
MN.VLC.HHZ. 2018-05-12T04:40:46.06 0.1 undecidable manual P 77 34.3434 50 0.03 100
GU.SARM.EHZ. 2018-05-12T04:40:46.44 0.1 undecidable manual P 74 36.1416 50 0.13 97
GU.FIVI.HNE. 2018-05-12T04:40:46.91 0.6 undecidable manual S 39 20.7681 115 -0.19 49
GU.EQUI.HHZ. 2018-05-12T04:40:45.61 0.3 undecidable manual S 62 17.0718 120 -0.35 72
GU.FIVI.HNE. 2018-05-12T04:40:44.01 0.1 undecidable manual P 39 20.7681 115 0.27 97
GU.EQUI.HHZ. 2018-05-12T04:40:43.26 0.1 positive manual P 62 17.0718 120 0.18 99
IV.PLMA.HHZ. 2018-05-12T04:40:43.64 0.1 undecidable manual S 242 10.0788 134 -0.37 97
IV.PLMA.HHZ. 2018-05-12T04:40:42.16 0.1 undecidable manual P 242 10.0788 134 0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHN. ML:1.5 0.00040849999999999995 0.14 AML other m 2018-05-12T04:40:43.83
IV.PLMA.HHE. ML:1.2 0.00020400000000000003 0.38 AML other m 2018-05-12T04:40:43.99
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