Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (controlled explosion) with magnitude of ML 2.0 on date 02-09-2016 and time 09:56:56 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 2.0 (controlled explosion) earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 02-09-2016 07:56:56 (UTC)
  • 02-09-2016 09:56:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6520, 7.8120 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: controlled explosion.

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
Bordighera IM 18 10469 10469
Ospedaletti IM 18 3367 13836
Sanremo IM 19 54807 68643

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km S of Sanremo (54807 inhabitants)
85 Km S of Cuneo (56081 inhabitants)
91 Km SW of Savona (61345 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 2.0 2016-09-02
07:56:56		 43.6515 7.812 1 2017-04-11
07:49:16		 Bollettino Sismico Italiano INGV 39169251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-09-02 07:56:56 ± 0.49
Latitude 43.6515 ± 0.0306
Longitude 7.8120 ± 0.0236
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type controlled explosion
Origin ID 39169251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3450
Semi-minor axis of confidence ellipse (meter) 1800
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 3450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 207
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.22573
Epicentral distance of station farthest from the epicenter (degree) 1.82293
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 39169251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-04-11 07:49:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2016-09-02T07:57:28.60 0.3 undecidable manual P 62 202.3419 38 -1.23 31
MN.BNI.HHN. 2016-09-02T07:57:26.62 0.3 undecidable manual P 330 179.487 50 -0.18 52
IV.GROG.HHN. 2016-09-02T07:57:25.44 0.3 undecidable manual P 98 169.1085 50 0.24 55
IV.MONC.HHZ. 2016-09-02T07:57:24.16 0.3 undecidable manual P 3 158.0196 50 0.67 51
GU.RSP.HHZ. 2016-09-02T07:57:24.34 0.3 undecidable manual P 346 171.5949 50 -1.24 37
GU.GORR.HHE. 2016-09-02T07:57:23.31 0.3 undecidable manual P 48 158.5191 50 -0.26 57
IV.MSSA.HHZ. 2016-09-02T07:57:23.23 0.1 undecidable manual P 61 154.8228 50 0.24 78
GU.BHB.HHE. 2016-09-02T07:57:19.65 0.3 undecidable manual P 342 138.3615 50 -0.81 51
GU.PCP.HHN. 2016-09-02T07:57:17.21 0.3 undecidable manual P 30 114.6963 50 0.4 62
GU.PZZ.HHN. 2016-09-02T07:57:16.10 0.1 undecidable manual P 330 109.9122 50 0.03 91
IV.QLNO.HHN. 2016-09-02T07:57:12.62 0.3 undecidable manual P 30 85.9473 50 0.24 68
GU.STV.HHE. 2016-09-02T07:57:10.48 0.1 undecidable manual P 330 76.4679 50 -0.44 89
GU.ENR.HHZ. 2016-09-02T07:57:09.57 0.1 undecidable manual P 334 71.0733 50 -0.52 88
GU.RORO.HHZ. 2016-09-02T07:57:07.31 0.1 undecidable manual P 22 55.0005 91 -0.07 100
GU.MGRO.HHZ. 2016-09-02T07:57:04.87 0.1 undecidable manual P 360 43.4232 91 -0.19 100
GU.BURY.HHE. 2016-09-02T07:57:02.92 0.1 undecidable manual P 305 25.0527 91 1.53 59
IV.IMI.HHZ. 2016-09-02T07:57:02.95 0.1 positive manual P 13 29.4483 91 0.69 89
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BHB.HHE. ML:1.8 0.00004175 0.9 AML other m 2016-09-02T07:57:38.48
GU.BHB.HHN. ML:1.8 0.00003895 0.98 AML other m 2016-09-02T07:57:40.16
GU.GORR.HHN. ML:2.1 0.00005690000000000001 0.88 AML other m 2016-09-02T07:57:49.43
GU.GORR.HHE. ML:2.0 0.0000443 1.04 AML other m 2016-09-02T07:57:54.23
GU.PCP.HHE. ML:2.3 0.0001545 0.6 AML other m 2016-09-02T07:57:34.58
GU.PCP.HHN. ML:2.2 0.00013900000000000002 0.62 AML other m 2016-09-02T07:57:34.59
GU.PZZ.HHE. ML:2.0 0.0000974 0.22 AML other m 2016-09-02T07:57:19.52
GU.PZZ.HHN. ML:2.2 0.000126 1.12 AML other m 2016-09-02T07:57:31.64
GU.RORO.HHE. ML:1.8 0.0001575 0.86 AML other m 2016-09-02T07:57:12.94
GU.RORO.HHN. ML:1.8 0.00015150000000000002 1.1 AML other m 2016-09-02T07:57:14.97
GU.STV.HHN. ML:2.0 0.00014050000000000003 0.78 AML other m 2016-09-02T07:57:22.14
GU.STV.HHE. ML:2.0 0.000154 1.2 AML other m 2016-09-02T07:57:21.70
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