INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.0 on date 15-02-2019 and time 19:03:54 (UTC) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 1.0 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 15-02-2019 19:03:54 (UTC)
  • 15-02-2019 20:03:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.76, 8.01 at 16 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
San Lorenzo al Mare IM 12 1297 1297
Costarainera IM 12 828 2125
Cipressa IM 12 1290 3415
Santo Stefano al Mare IM 13 2197 5612
Riva Ligure IM 14 2910 8522
Terzorio IM 14 216 8738
Civezza IM 15 609 9347
Imperia IM 15 42034 51381
Pompeiana IM 15 823 52204
Taggia IM 16 14116 66320
Castellaro IM 17 1256 67576
Pietrabruna IM 17 501 68077
Dolcedo IM 18 1415 69492
Diano Marina IM 18 5977 75469
Diano Castello IM 19 2214 77683
Sanremo IM 20 54807 132490
Prelà IM 20 503 132993
Diano San Pietro IM 20 1145 134138

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Sanremo (54807 inhabitants)
72 Km SW of Savona (61345 inhabitants)
80 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 1.0 2019-02-15
19:03:54
43.76 8.01 16 2019-02-15
19:55:51
Sala Sismica INGV-Roma 65586061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-15 19:03:54 ± 0.24
Latitude 43.76 ± 0.01
Longitude 8.01 ± 0.01
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 65586061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1380
Semi-minor axis of confidence ellipse (meter) 631
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 191
Circular confidence region, given by single value of horizontal uncertainty (meter) 1380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 299
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.17627
Epicentral distance of station farthest from the epicenter (degree) 0.69428
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 65586061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-15 19:55:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.STV.HHZ. 2019-02-15T19:04:17.80 0.6 undecidable manual S 315 0.6943 94 0.07 46
GU.STV.HHZ. 2019-02-15T19:04:08.38 1.0 positive manual P 315 0.6943 94 0.41 21
FR.SAOF.HHZ.00 2019-02-15T19:04:08.96 0.6 undecidable manual S 305 0.4029 98 -0.16 47
GU.RORO.HHZ. 2019-02-15T19:04:07.74 0.6 undecidable manual S 6 0.357 99 -0.05 49
GU.GBOS.HHZ. 2019-02-15T19:04:04.69 0.1 undecidable manual P 346 0.5 96 0.02 96
FR.SAOF.HHZ.00 2019-02-15T19:04:02.74 0.6 positive manual P 305 0.4029 98 -0.27 46
IV.IMI.HHZ. 2019-02-15T19:04:02.57 0.6 undecidable manual S 331 0.1763 116 -0.07 51
GU.RORO.HHZ. 2019-02-15T19:04:02.22 0.1 undecidable manual P 6 0.357 99 -0.02 98
IV.IMI.HHZ. 2019-02-15T19:03:59.41 0.1 undecidable manual P 331 0.1763 116 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHN. ML:1 1.565806E-5 0.1664 AML other m 2019-02-15T19:04:19.04
IV.IMI.HHN. ML:0.8 4.512427E-5 0.064 AML other m 2019-02-15T19:04:02.69
GU.RORO.HHE. ML:1 3.15475E-5 0.0896 AML other m 2019-02-15T19:04:07.74
GU.RORO.HHN. ML:1.1 3.9387675E-5 0.1024 AML other m 2019-02-15T19:04:07.80
GU.STV.HHE. ML:1.2 1.2346002E-5 0.1024 AML other m 2019-02-15T19:04:18.82
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