Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 03-09-2018 and time 19:37:30 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 2.1 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 03-09-2018 17:37:30 (UTC)
  • 03-09-2018 19:37:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5500, 7.4910 at 9 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SW of Sanremo (54807 inhabitants)
94 Km S of Cuneo (56081 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 2.1 2018-09-03
17:37:30		 43.5495 7.4907 9 2019-06-04
09:16:08		 Bollettino Sismico Italiano INGV 65175591
Reviewed
Rev100 		ML 2.1 2018-09-03
17:37:30		 43.5528 7.5138 30 2018-09-03
18:03:53		 Sala Sismica INGV-Roma 60536621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-03 17:37:30 ± 0.16
Latitude 43.5495 ± 0.0063
Longitude 7.4907 ± 0.0074
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 65175591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 707
Semi-minor axis of confidence ellipse (meter) 638
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 234
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.78156
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 65175591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-04 09:09:28

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 60536621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-03 18:03:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMP.HHZ. 2018-09-03T17:39:28.08 3.0 undecidable manual Sn 2.3 0
IV.MF5.EHZ. 2018-09-03T17:39:27.20 3.0 undecidable manual Sn -2 0
YD.T1413.EHZ. 2018-09-03T17:39:11.67 3.0 negative manual Pg 13.89 0
IV.NDIM.HNZ. 2018-09-03T17:39:04.83 3.0 undecidable manual Sg 16.73 0
IV.FIU.EHZ. 2018-09-03T17:38:55.85 3.0 undecidable manual Sn 0.28 0
IV.AGLI.HHZ. 2018-09-03T17:38:44.67 3.0 undecidable manual Sn -6.42 0
IV.LRP.EHZ. 2018-09-03T17:38:43.50 3.0 positive manual Pn -1.88 0
IV.FDMO.HHZ. 2018-09-03T17:38:43.95 3.0 undecidable manual Pg 9.61 0
IV.TERO.HHZ. 2018-09-03T17:38:39.35 3.0 undecidable manual Pn -1.38 0
IV.IMOL.EHZ. 2018-09-03T17:38:28.59 3.0 positive manual Pg 7.87 0
IV.EUCT.HNZ. 2018-09-03T17:38:28.30 3.0 undecidable manual Sn -0.27 0
IV.ZONE.HHZ. 2018-09-03T17:38:17.37 3.0 negative manual Pn 1.26 0
GU.PZZ.HHZ. 2018-09-03T17:38:03.10 0.6 undecidable manual S 344 110.3118 50 -0.22 43
Z3.A317A.HHE. 2018-09-03T17:38:01.60 0.6 undecidable manual P 105 197.7576 38 -0.92 0
MN.BNI.HHZ. 2018-09-03T17:38:00.67 1.0 undecidable manual P 339 178.6878 38 0.52 0
GU.RSP.HHZ. 2018-09-03T17:37:59.03 0.6 undecidable manual P 354 178.1883 38 -1.06 0
GU.CANO.HHZ. 2018-09-03T17:37:59.40 1.0 undecidable manual S 39 94.3389 50 0.36 23
GU.RRL.HHE. 2018-09-03T17:37:58.07 0.6 undecidable manual P 340 162.0156 50 0.45 0
IV.MSSA.HHZ. 2018-09-03T17:37:58.38 0.3 undecidable manual P 62 182.8836 38 -2.29 0
GU.RNCA.HHE. 2018-09-03T17:37:55.87 0.6 undecidable manual P 48 155.0226 50 -0.67 0
GU.GBOS.HHZ. 2018-09-03T17:37:55.60 0.3 undecidable manual S 20 81.6516 50 -0.08 74
GU.RORO.HHZ. 2018-09-03T17:37:54.40 0.3 undecidable manual S 36 77.5668 50 -0.18 73
GU.ENR.HHZ. 2018-09-03T17:37:54.00 0.3 undecidable manual S 356 75.369 50 0.02 75
GU.BHB.HHZ. 2018-09-03T17:37:53.43 0.1 undecidable manual P 353 143.745 50 -1.38 2
GU.PZZ.HHZ. 2018-09-03T17:37:49.78 0.1 undecidable manual P 344 110.3118 50 0.13 87
IV.IMI.HHZ. 2018-09-03T17:37:47.80 0.3 undecidable manual S 39 51.4152 50 0.2 72
GU.CANO.HHZ. 2018-09-03T17:37:46.89 0.1 undecidable manual P 39 94.3389 50 -0.29 94
GU.GBOS.HHZ. 2018-09-03T17:37:45.52 0.1 undecidable manual P 20 81.6516 50 0.28 95
GU.RORO.HHZ. 2018-09-03T17:37:44.48 0.1 undecidable manual P 36 77.5668 50 -0.13 98
GU.ENR.HHZ. 2018-09-03T17:37:44.27 0.1 negative manual P 356 75.369 50 0.01 100
GU.BURY.HNN. 2018-09-03T17:37:40.70 0.3 undecidable manual S 12 26.3514 109 0.02 75
IV.IMI.HHZ. 2018-09-03T17:37:40.67 0.1 undecidable manual P 39 51.4152 50 0.09 98
GU.BURY.HNN. 2018-09-03T17:37:36.53 0.3 undecidable manual P 12 26.3514 109 -0.05 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IMI.HHE. ML:2.3 0.00045755495 0.256 AML other m 2018-09-03T17:37:48.13
IV.IMI.HHN. ML:2.4 0.0006520732 0.2304 AML other m 2018-09-03T17:37:48.40
GU.ENR.HHE. ML:2.3 0.00029109285 0.2176 AML other m 2018-09-03T17:37:54.85
GU.ENR.HHN. ML:2.4 0.00039782305 0.1408 AML other m 2018-09-03T17:37:54.78
GU.GBOS.HHE. ML:2.0 0.00013463395 0.256 AML other m 2018-09-03T17:37:55.93
GU.RORO.HHN. ML:2.0 0.00015029575 0.2304 AML other m 2018-09-03T17:37:56.22
GU.RORO.HHE. ML:1.9 0.00012450205 0.128 AML other m 2018-09-03T17:37:56.67
GU.GBOS.HHN. ML:1.8 0.00008529107 0.5632 AML other m 2018-09-03T17:37:59.52
GU.CANO.HHN. ML:2.4 0.00024219295000000001 0.256 AML other m 2018-09-03T17:38:00.33
GU.CANO.HHE. ML:2.2 0.0001694813 0.512 AML other m 2018-09-03T17:38:00.26
GU.PZZ.HHN. ML:2.6 0.00033700995 1.6672 AML other m 2018-09-03T17:38:04.07
GU.PZZ.HHE. ML:2.4 0.00020451425000000002 0.32 AML other m 2018-09-03T17:38:05.31
GU.BHB.HHN. ML:1.9 0.000046217130000000004 0.1536 AML other m 2018-09-03T17:38:13.70
GU.BHB.HHE. ML:1.8 0.000034015165 1.744 AML other m 2018-09-03T17:38:15.98
GU.RSP.HHE. ML:1.7 0.000021289870000000002 0.2176 AML other m 2018-09-03T17:38:26.11
GU.RSP.HHN. ML:1.8 0.000026289964999999998 1.7696 AML other m 2018-09-03T17:38:28.06
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
Waveforms Seismic signals in miniseed + resp format Download