Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 16-09-2017 and time 11:10:20 (Italy) in region 2 km E Ameglia (SP)

A magnitude ML 1.3 earthquake occured in region: 2 km E Ameglia (SP), on

  • 16-09-2017 09:10:20 (UTC)
  • 16-09-2017 11:10:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0630, 9.9880 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
Ameglia SP 2 4365 4365
Castelnuovo Magra SP 5 8415 12780
Ortonovo SP 5 8277 21057
Sarzana SP 6 21976 43033
Lerici SP 6 10228 53261
Fosdinovo MS 8 4883 58144
Arcola SP 9 10607 68751
Carrara MS 9 63133 131884
Portovenere SP 12 3630 135514
Vezzano Ligure SP 12 7356 142870
Santo Stefano di Magra SP 13 9360 152230
Massa MS 13 69479 221709
La Spezia SP 14 93959 315668
Follo SP 15 6337 322005
Montignoso MS 16 10323 332328
Bolano SP 16 7813 340141
Aulla MS 16 11263 351404
Podenzana MS 17 2180 353584
Forte dei Marmi LU 18 7510 361094
Tresana MS 20 2044 363138

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km W of Carrara (63133 inhabitants)
13 Km W of Massa (69479 inhabitants)
14 Km E of La Spezia (93959 inhabitants)
30 Km NW of Viareggio (62467 inhabitants)
48 Km NW of Lucca (89046 inhabitants)
51 Km NW of Pisa (89158 inhabitants)
62 Km NW of Livorno (159219 inhabitants)
76 Km W of Pistoia (90315 inhabitants)
87 Km SW of Parma (192836 inhabitants)
87 Km SW of Reggio nell'Emilia (171345 inhabitants)
91 Km W of Prato (191150 inhabitants)
93 Km E of Genova (586655 inhabitants)
99 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 1.3 2017-09-16
09:10:20		 44.063 9.9882 10 2018-09-04
09:06:01		 Bollettino Sismico Italiano INGV 58124981
Reviewed
Rev100 		ML 1.3 2017-09-16
09:10:20		 44.0592 9.987 10 2017-09-16
09:14:59		 Sala Sismica INGV-Roma 50140791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-09-16 09:10:20 ± 0.13
Latitude 44.0630 ± 0.0090
Longitude 9.9882 ± 0.0088
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 58124981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 962
Semi-minor axis of confidence ellipse (meter) 575
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 351
Circular confidence region, given by single value of horizontal uncertainty (meter) 960.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
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) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.55218
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 50140791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-09-16 09:14:59

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 58124981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-06-25 13:14:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.POPM.HHZ. 2017-09-16T09:10:39.97 0.6 undecidable manual S 92 61.2942 50 0.27 44
GU.GRAM.HHZ. 2017-09-16T09:10:36.54 0.3 undecidable manual S 7 47.9187 50 0.42 65
IV.MSSA.HHZ. 2017-09-16T09:10:34.95 0.6 undecidable manual S 307 46.8198 50 -0.87 37
GU.CARD.HHZ. 2017-09-16T09:10:33.28 0.3 undecidable manual S 96 39.627 50 -0.62 62
GU.POPM.HHZ. 2017-09-16T09:10:32.20 0.3 undecidable manual P 92 61.2942 50 0.54 62
GU.SARM.EHZ. 2017-09-16T09:10:32.41 0.3 undecidable manual S 68 35.5422 50 -0.39 67
MN.VLC.HHZ. 2017-09-16T09:10:31.65 0.3 undecidable manual S 71 33.4443 50 -0.61 63
GU.GRAM.HHZ. 2017-09-16T09:10:29.92 0.1 undecidable manual P 7 47.9187 50 0.33 89
GU.FIVI.HNE. 2017-09-16T09:10:29.19 0.6 undecidable manual S 29 22.4553 114 -0.06 49
IV.MSSA.HHZ. 2017-09-16T09:10:29.36 0.3 undecidable manual P 307 46.8198 50 -0.06 71
GU.CARD.HHZ. 2017-09-16T09:10:28.61 0.3 undecidable manual P 96 39.627 50 0.3 68
GU.MAIM.HHZ. 2017-09-16T09:10:28.96 0.3 undecidable manual P 112 43.4232 50 0.06 71
MN.VLC.HHZ. 2017-09-16T09:10:27.55 0.1 undecidable manual P 71 33.4443 50 0.18 94
GU.SARM.EHZ. 2017-09-16T09:10:27.84 0.1 undecidable manual P 68 35.5422 50 0.16 94
GU.EQUI.HHZ. 2017-09-16T09:10:27.37 0.3 undecidable manual S 49 17.3715 120 -0.32 71
IV.PLMA.HHZ. 2017-09-16T09:10:25.39 0.6 undecidable manual S 262 10.7781 133 -0.46 46
GU.FIVI.HNE. 2017-09-16T09:10:25.72 0.3 undecidable manual P 29 22.4553 114 0.09 73
GU.EQUI.HHZ. 2017-09-16T09:10:24.86 0.1 positive manual P 49 17.3715 120 0.13 98
IV.PLMA.HHZ. 2017-09-16T09:10:23.75 0.1 undecidable manual P 262 10.7781 133 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHN. ML:1.6 0.0004805 0.12 AML other m 2017-09-16T09:10:25.45
IV.PLMA.HHE. ML:1.1 0.0001655 0.26 AML other m 2017-09-16T09:10:25.59
GU.EQUI.HHE. ML:1.3 0.00015099999999999998 0.36 AML other m 2017-09-16T09:10:27.67
GU.EQUI.HHN. ML:1.0 0.00009010000000000001 1.32 AML other m 2017-09-16T09:10:27.68
GU.SARM.EHN. ML:1.5 0.00011355000000000001 0.4 AML other m 2017-09-16T09:10:32.71
GU.SARM.EHE. ML:1.3 0.0000808 0.32 AML other m 2017-09-16T09:10:32.95
GU.CARD.HHN. ML:1.3 0.00006685 0.74 AML other m 2017-09-16T09:10:33.85
GU.CARD.HHE. ML:1.2 0.0000514 0.16 AML other m 2017-09-16T09:10:33.56
GU.GRAM.HHE. ML:1.2 0.00004375 0.24 AML other m 2017-09-16T09:10:37.81
GU.GRAM.HHN. ML:1.3 0.00004765 1.08 AML other m 2017-09-16T09:10:39.83
GU.POPM.HHE. ML:1.3 0.000040300000000000004 0.34 AML other m 2017-09-16T09:10:42.23
GU.POPM.HHN. ML:1.4 0.0000467 0.52 AML other m 2017-09-16T09:10:42.64
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