Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 07-04-2020 and time 07:22:28 (UTC) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 2.4 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 07-04-2020 07:22:28 (UTC)
  • 07-04-2020 09:22:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0340, 7.6430 at 6 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Briga Alta CN 10 39 39
Triora IM 11 355 394
Pigna IM 11 859 1253
Molini di Triora IM 12 617 1870
Castel Vittorio IM 12 287 2157
Mendatica IM 14 185 2342
Montegrosso Pian Latte IM 15 118 2460
Bajardo IM 16 312 2772
Cosio d'Arroscia IM 16 221 2993
Rocchetta Nervina IM 16 298 3291
Isolabona IM 17 679 3970
Apricale IM 17 629 4599
Rezzo IM 19 366 4965
Perinaldo IM 19 870 5835
Pornassio IM 19 685 6520
Airole IM 19 407 6927
Limone Piemonte CN 19 1485 8412
Olivetta San Michele IM 20 211 8623
Carpasio IM 20 168 8791
Ceriana IM 20 1250 10041

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Sanremo (54807 inhabitants)
41 Km S of Cuneo (56081 inhabitants)
74 Km W 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 2.4 2020-04-07
07:22:28		 44.0342 7.6428 7 2020-07-18
21:08:35		 Bollettino Sismico Italiano INGV 78830971
Reviewed
Rev100 		ML 2.4 2020-04-07
07:22:28		 44.0338 7.6403 6 2020-04-07
07:31:13		 Sala Sismica INGV-Roma 77970601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-07 07:22:28 ± 0.07
Latitude 44.0342 ± 0.0045
Longitude 7.6428 ± 0.0050
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78830971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 370
Semi-minor axis of confidence ellipse (meter) 368
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
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) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 2.71595
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 27
Type of magnitude ML
Reference to an origin 78830971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-04 07:51:59

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 77970601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-07 07:31:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.TUE.HHZ. 2020-04-07T07:23:14.13 1.0 undecidable manual P 26 301.476 38 0.93 5
GU.RRL.HHZ. 2020-04-07T07:23:03.09 0.6 undecidable manual S 326 119.2917 50 -0.56 37
RD.ORIF.BHZ. 2020-04-07T07:22:57.58 1.0 undecidable manual P 306 170.5959 50 0.95 13
GU.BHB.HHZ. 2020-04-07T07:22:56.35 0.6 undecidable manual S 341 93.8394 50 -0.51 40
GU.TRAV.HHE. 2020-04-07T07:22:55.05 1.0 undecidable manual P 3 164.2134 50 -0.61 16
GU.GORR.HHE. 2020-04-07T07:22:53.39 0.6 undecidable manual P 64 145.5432 50 0.61 34
MN.BNI.HHZ. 2020-04-07T07:22:51.60 0.6 undecidable manual P 326 136.2636 50 0.25 39
GU.PZZ.HHZ. 2020-04-07T07:22:49.37 0.6 undecidable manual S 322 67.0773 50 -0.36 43
GU.RRL.HHZ. 2020-04-07T07:22:49.05 0.3 undecidable manual P 326 119.2917 50 0.32 59
IV.MONC.HHZ. 2020-04-07T07:22:49.79 1.0 undecidable manual P 11 117.4935 50 1.33 13
GU.CANO.HHZ. 2020-04-07T07:22:45.06 0.6 undecidable manual S 68 51.1155 50 -0.4 44
GU.BHB.HHZ. 2020-04-07T07:22:44.70 0.3 undecidable manual P 341 93.8394 50 -0.1 65
GU.PCP.HHZ. 2020-04-07T07:22:44.84 0.6 undecidable manual P 52 91.1421 50 0.45 41
GU.PZZ.HHZ. 2020-04-07T07:22:41.17 0.3 undecidable manual P 322 67.0773 50 0.48 63
IV.QLNO.HHZ. 2020-04-07T07:22:40.31 0.3 undecidable manual P 60 64.491 50 0.02 70
GU.STV.HHZ. 2020-04-07T07:22:40.26 0.6 undecidable manual S 313 34.4433 101 -0.23 47
GU.ENR.HHZ. 2020-04-07T07:22:38.03 0.3 undecidable manual S 320 27.75 103 -0.19 72
GU.BURY.HNZ. 2020-04-07T07:22:38.28 0.6 undecidable manual S 194 28.749 103 -0.28 47
GU.GBOS.HHZ. 2020-04-07T07:22:38.11 0.3 undecidable manual S 34 27.8499 103 -0.15 73
IV.IMI.HHZ. 2020-04-07T07:22:37.13 0.3 undecidable manual S 124 24.2535 105 0.09 74
GU.CANO.HHZ. 2020-04-07T07:22:37.98 0.3 undecidable manual P 68 51.1155 50 -0.24 69
GU.STV.HHZ. 2020-04-07T07:22:35.43 0.1 positive manual P 313 34.4433 101 0.07 98
GU.RORO.HHZ. 2020-04-07T07:22:35.27 0.3 undecidable manual P 75 34.8429 100 -0.17 72
GU.GBOS.HHZ. 2020-04-07T07:22:34.19 0.3 undecidable manual P 34 27.8499 103 0.12 73
GU.ENR.HHZ. 2020-04-07T07:22:34.33 0.1 positive manual P 320 27.75 103 0.29 95
GU.BURY.HNZ. 2020-04-07T07:22:34.13 0.3 undecidable manual P 194 28.749 103 -0.11 74
IV.IMI.HHZ. 2020-04-07T07:22:33.23 0.1 undecidable manual P 124 24.2535 105 -0.13 98
FR.SAOF.HHZ.00 2020-04-07T07:22:31.98 0.3 undecidable manual S 233 8.88 126 -0.18 75
FR.SAOF.HHZ.00 2020-04-07T07:22:30.72 0.1 negative manual P 233 8.88 126 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IMI.HHN. ML:2.8 0.0036848920000000004 0.4608 AML other m 2020-04-07T07:22:39.69
IV.IMI.HHE. ML:2.4 0.0018454118 0.4224 AML other m 2020-04-07T07:22:38.28
GU.GBOS.HHE. ML:2.1 0.0006998714500000001 0.7776 AML other m 2020-04-07T07:22:40.59
GU.GBOS.HHN. ML:2.1 0.0007449802999999999 0.5376 AML other m 2020-04-07T07:22:41.43
GU.ENR.HHN. ML:2.4 0.0014659973 0.32 AML other m 2020-04-07T07:22:38.50
GU.ENR.HHE. ML:2.3 0.0010979193500000003 0.24 AML other m 2020-04-07T07:22:38.23
GU.RORO.HHE. ML:2.0 0.00046430914999999993 0.32 AML other m 2020-04-07T07:22:40.25
GU.RORO.HHN. ML:2.1 0.00053801215 0.24 AML other m 2020-04-07T07:22:41.54
GU.STV.HHN. ML:2.4 0.0011141845 0.24 AML other m 2020-04-07T07:22:40.39
GU.STV.HHE. ML:2.6 0.0018259609999999999 0.2592 AML other m 2020-04-07T07:22:39.89
GU.CANO.HHN. ML:2.5 0.0009193253999999999 0.4 AML other m 2020-04-07T07:22:48.04
IV.QLNO.HHN. ML:2.2 0.0003107685 0.3616 AML other m 2020-04-07T07:22:54.04
IV.QLNO.HHE. ML:2.3 0.00039058085 0.3392 AML other m 2020-04-07T07:22:55.02
GU.PZZ.HHE. ML:2.5 0.0006007200999999999 0.2784 AML other m 2020-04-07T07:22:54.95
GU.PZZ.HHN. ML:2.8 0.0011775 0.42 AML other m 2020-04-07T07:22:50.45
GU.BHB.HHE. ML:2.5 0.000361 0.32 AML other m 2020-04-07T07:22:56.52
GU.BHB.HHN. ML:2.5 0.000331175 0.2784 AML other m 2020-04-07T07:22:57.95
GU.PCP.HHN. ML:2.3 0.00020841070000000001 0.5216 AML other m 2020-04-07T07:23:00.92
GU.PCP.HHE. ML:2.6 0.0004123345 0.6592 AML other m 2020-04-07T07:23:03.32
GU.RRL.HHE. ML:2.3 0.00014231063999999997 0.7616 AML other m 2020-04-07T07:23:19.79
GU.RRL.HHN. ML:2.4 0.0001678859 0.4 AML other m 2020-04-07T07:23:17.63
IV.MONC.HHN. ML:2.9 0.0006614008499999999 0.48 AML other m 2020-04-07T07:23:12.81
MN.BNI.HNN. ML:2.0 0.00005947234 0.5792 AML other m 2020-04-07T07:23:18.70
MN.BNI.HHE. ML:2.0 0.000059044725 0.6176 AML other m 2020-04-07T07:23:13.75
MN.BNI.HNE. ML:2.0 0.00006579097 0.64 AML other m 2020-04-07T07:23:13.75
RD.ORIF.BHE. ML:2.7 0.00021478435 0.4 AML other m 2020-04-07T07:23:23.27
RD.ORIF.BHN. ML:2.6 0.000145119155 0.5984 AML other m 2020-04-07T07:23:23.23
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