Earthquake with magnitude of ML 1.5 on date 18-11-2019 and time 18:31:23 (UTC) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 1.5 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 18-11-2019 18:31:23 (UTC)
  • 18-11-2019 19:31:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.73, 7.95 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Santo Stefano al Mare IM 13 2197 2197
Riva Ligure IM 13 2910 5107
Cipressa IM 14 1290 6397
San Lorenzo al Mare IM 14 1297 7694
Costarainera IM 14 828 8522
Terzorio IM 15 216 8738
Pompeiana IM 15 823 9561
Taggia IM 15 14116 23677
Castellaro IM 17 1256 24933
Civezza IM 17 609 25542
Sanremo IM 17 54807 80349
Pietrabruna IM 18 501 80850
Imperia IM 19 42034 122884
Dolcedo IM 20 1415 124299

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km SE of Sanremo (54807 inhabitants)
77 Km SW of Savona (61345 inhabitants)
81 Km SE of Cuneo (56081 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.5 2019-11-18
18:31:23
43.73 7.95 9 2019-11-18
18:41:14
Sala Sismica INGV-Roma 73910221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-11-18 18:31:23 ± 0.16
Latitude 43.73 ± 0.01
Longitude 7.95 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73910221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 851
Semi-minor axis of confidence ellipse (meter) 614
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 850
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.18616
Epicentral distance of station farthest from the epicenter (degree) 1.40564
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 73910221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-11-18 18:41:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
RD.PGF.BHE. 2019-11-18T18:31:49.43 0.6 undecidable manual P 147 1.4056 50 0.28 38
GU.STV.HHZ. 2019-11-18T18:31:46.78 0.3 undecidable manual S 319 0.6844 50 0.19 70
IV.QLNO.HHZ. 2019-11-18T18:31:45.83 1.0 undecidable manual S 25 0.6583 50 0.02 24
GU.GBOS.HHE. 2019-11-18T18:31:41.52 0.3 undecidable manual S 351 0.518 50 -0.13 74
FR.SAOF.HHZ.00 2019-11-18T18:31:37.86 0.3 undecidable manual S 312 0.3858 50 0.14 76
IV.QLNO.HHZ. 2019-11-18T18:31:36.58 1.0 undecidable manual P 25 0.6583 50 0.22 23
GU.STV.HHZ. 2019-11-18T18:31:36.60 1.0 negative manual P 319 0.6844 50 -0.21 23
GU.CANO.HHZ. 2019-11-18T18:31:34.07 0.3 undecidable manual P 23 0.5198 50 0.08 75
GU.GBOS.HHE. 2019-11-18T18:31:33.75 0.3 undecidable manual P 351 0.518 50 -0.22 73
FR.SAOF.HHZ.00 2019-11-18T18:31:31.51 0.1 undecidable manual P 312 0.3858 50 -0.19 100
IV.IMI.HHZ. 2019-11-18T18:31:31.53 0.3 undecidable manual S 347 0.1862 114 0.21 78
IV.IMI.HHZ. 2019-11-18T18:31:27.82 0.3 undecidable manual P 347 0.1862 114 -0.18 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHE. ML:2 0.0001335 1.76 AML other m 2019-11-18T18:31:47.07
GU.STV.HHN. ML:1.6 6.13E-5 0.28 AML other m 2019-11-18T18:31:47.25
IV.IMI.HHE. ML:1.1 8.3841465E-5 1.3312 AML other m 2019-11-18T18:31:31.94
IV.IMI.HHN. ML:0.9 6.0985255E-5 0.4736 AML other m 2019-11-18T18:31:31.80
FR.SAOF.HHE.00 ML:1.4 9.099319E-5 0.064 AML other m 2019-11-18T18:31:38.55
FR.SAOF.HHN.00 ML:1.6 0.00012749015 0.064 AML other m 2019-11-18T18:31:38.54
IV.QLNO.HHE. ML:1.6 5.824162E-5 1.216 AML other m 2019-11-18T18:31:46.25
IV.QLNO.HHN. ML:1.4 3.770052E-5 2.5216 AML other m 2019-11-18T18:31:47.35
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