Earthquake with magnitude of ML 1.7 on date 07-04-2020 and time 10:16:50 (UTC) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 1.7 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 07-04-2020 10:16:50 (UTC)
  • 07-04-2020 12:16:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.03, 7.66 at 1 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
Triora IM 10 355 355
Briga Alta CN 10 39 394
Molini di Triora IM 11 617 1011
Pigna IM 11 859 1870
Castel Vittorio IM 12 287 2157
Mendatica IM 13 185 2342
Montegrosso Pian Latte IM 14 118 2460
Cosio d'Arroscia IM 15 221 2681
Bajardo IM 15 312 2993
Rocchetta Nervina IM 16 298 3291
Apricale IM 17 629 3920
Isolabona IM 17 679 4599
Rezzo IM 17 366 4965
Pornassio IM 18 685 5650
Perinaldo IM 18 870 6520
Carpasio IM 19 168 6688
Montalto Ligure IM 19 377 7065
Ceriana IM 19 1250 8315
Airole IM 20 407 8722
Limone Piemonte CN 20 1485 10207

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Sanremo (54807 inhabitants)
41 Km S of Cuneo (56081 inhabitants)
73 Km W of Savona (61345 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 1.7 2020-04-07
10:16:50
44.03 7.66 1 2020-04-07
10:33:06
Sala Sismica INGV-Roma 77978741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-07 10:16:50 ± 0.09
Latitude 44.03 ± 0.01
Longitude 7.66 ± 0.01
Depth (km) 1 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77978741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 559
Semi-minor axis of confidence ellipse (meter) 213
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 309
Circular confidence region, given by single value of horizontal uncertainty (meter) 560
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.02523
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 77978741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-07 10:33:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-04-07T10:18:34.84 3.0 negative manual Pg 21.15 0
TV.SF04.EHZ. 2020-04-07T10:18:21.19 3.0 undecidable manual Sn 2.6 0
IV.FAGN.HHZ. 2020-04-07T10:18:18.66 3.0 negative manual Pg 17.860001 0
IV.NDIM.HHZ. 2020-04-07T10:18:11.22 3.0 undecidable manual Sg 9.15 0
IV.SRES.HHZ. 2020-04-07T10:17:58.83 3.0 undecidable manual Pn 7.71 0
IV.ARVD.HHZ. 2020-04-07T10:17:56.69 3.0 undecidable manual Pn 7.11 0
IV.PE3.EHZ. 2020-04-07T10:17:55.45 3.0 negative manual Pg 10.67 0
IV.BRSN.EHZ. 2020-04-07T10:17:49.20 3.0 negative manual Pg 8.85 0
IV.PII.HHZ. 2020-04-07T10:17:24.85 3.0 positive manual Pn -0.44 0
RD.PGF.BHZ. 2020-04-07T10:17:19.80 3.0 positive manual Pn -1.05 0
GU.BHB.HHZ. 2020-04-07T10:17:17.36 3.0 undecidable manual S -3.25 0
IV.MONC.HHZ. 2020-04-07T10:17:12.38 3.0 positive manual P 1.33 0
GU.RRL.HHZ. 2020-04-07T10:17:11.67 3.0 undecidable manual P 0.33 0
GU.RNCA.HHE. 2020-04-07T10:17:11.16 0.6 undecidable manual P 64 1.0252 50 0.78 34
GU.PCP.HHZ. 2020-04-07T10:17:07.27 0.6 undecidable manual P 51 0.8139 50 0.5 40
GU.BHB.HHZ. 2020-04-07T10:17:06.49 3.0 negative manual P -0.7 0
GU.PZZ.HHZ. 2020-04-07T10:17:03.10 0.1 negative manual P 321 0.6115 50 -0.2 90
IV.QLNO.HHZ. 2020-04-07T10:17:02.02 0.6 positive manual P 59 0.5738 50 -0.64 40
GU.BURY.HNZ. 2020-04-07T10:17:00.00 0.6 undecidable manual S 196 0.2599 92 -0.17 48
GU.CANO.HHZ. 2020-04-07T10:16:59.67 0.6 negative manual P 67 0.4524 91 -0.54 43
GU.GBOS.HHZ. 2020-04-07T10:16:59.60 0.6 undecidable manual S 32 0.2473 92 -0.08 49
IV.IMI.HHZ. 2020-04-07T10:16:58.20 0.6 undecidable manual S 125 0.2095 93 -0.04 50
GU.STV.HHZ. 2020-04-07T10:16:57.02 0.6 negative manual P 312 0.3184 92 -0.22 47
GU.RORO.HHZ. 2020-04-07T10:16:57.03 0.6 undecidable manual P 75 0.3049 92 0.09 49
GU.GBOS.HHZ. 2020-04-07T10:16:55.84 0.3 undecidable manual P 32 0.2473 92 0.19 73
GU.ENR.HHZ. 2020-04-07T10:16:55.94 0.1 positive manual P 319 0.2572 92 0.06 99
GU.BURY.HNZ. 2020-04-07T10:16:55.76 0.6 undecidable manual P 196 0.2599 92 -0.17 48
IV.IMI.HHZ. 2020-04-07T10:16:54.88 0.1 positive manual P 125 0.2095 93 0.06 100
FR.SAOF.HHZ.00 2020-04-07T10:16:53.65 0.6 undecidable manual S 238 0.0872 97 0.1 51
FR.SAOF.HHZ.00 2020-04-07T10:16:52.46 0.6 undecidable manual P 238 0.0872 97 0.35 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
FR.SAOF.HHN.00 ML:2.1 0.001855 0.42 AML other m 2020-04-07T10:16:53.98
FR.SAOF.HHE.00 ML:1.9 0.00112 0.8 AML other m 2020-04-07T10:16:55.07
IV.IMI.HHE. ML:1.8 0.000435 1.04 AML other m 2020-04-07T10:16:59.62
IV.IMI.HHN. ML:2.2 0.0010275 0.4 AML other m 2020-04-07T10:16:59.49
GU.ENR.HHE. ML:1.7 0.0002725 1.52 AML other m 2020-04-07T10:17:00.83
GU.ENR.HHN. ML:1.8 0.000316 1.46 AML other m 2020-04-07T10:17:00.10
GU.GBOS.HHE. ML:1.3 0.000125 0.44 AML other m 2020-04-07T10:17:00.04
GU.GBOS.HHN. ML:1.4 0.0001425 0.38 AML other m 2020-04-07T10:17:00.67
GU.STV.HHE. ML:1.8 0.000278 0.16 AML other m 2020-04-07T10:17:01.60
GU.RORO.HHN. ML:1.5 0.0001485 1.46 AML other m 2020-04-07T10:17:01.83
GU.STV.HHN. ML:1.6 0.000161 0.24 AML other m 2020-04-07T10:17:01.99
GU.RORO.HHE. ML:1.7 0.0002365 0.8 AML other m 2020-04-07T10:17:01.57
GU.CANO.HHN. ML:1.8 0.0001855 1.28 AML other m 2020-04-07T10:17:07.05
GU.PZZ.HHN. ML:2 0.00016 0.5 AML other m 2020-04-07T10:17:12.04
GU.PZZ.HHE. ML:1.8 0.000107 0.2 AML other m 2020-04-07T10:17:16.64
IV.QLNO.HHE. ML:1.6 8.12E-5 0.32 AML other m 2020-04-07T10:17:16.41
IV.QLNO.HHN. ML:1.5 6.705E-5 1.3 AML other m 2020-04-07T10:17:16.92
GU.BHB.HHE. ML:1.8 6.685E-5 0.14 AML other m 2020-04-07T10:17:18.36
GU.CANO.HHE. ML:1.9 0.000221 1.34 AML other m 2020-04-07T10:17:18.28
GU.BHB.HHN. ML:1.9 8.315E-5 0.16 AML other m 2020-04-07T10:17:19.50
GU.PCP.HHN. ML:1.6 4.495E-5 0.78 AML other m 2020-04-07T10:17:23.43
GU.PCP.HHE. ML:1.7 6.145E-5 0.6 AML other m 2020-04-07T10:17:24.86
IV.MONC.HHN. ML:2.1 9.77E-5 1 AML other m 2020-04-07T10:17:30.08
IV.MONC.HHE. ML:2.2 0.0001175 1.64 AML other m 2020-04-07T10:17:32.14
TV.SF04.EHE. ML:4 0.000797 1.46 AML other m 2020-04-07T10:18:31.13
TV.SF04.EHN. ML:3.8 0.0006105 1.94 AML other m 2020-04-07T10:18:33.02
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