Earthquake with magnitude of ML 2.4 on date 07-04-2020 and time 09:22:28 (Italy) 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) 44.03, 7.64 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.

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

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Bulletin
Rev1000
ML 2.4 2020-04-07
07:22:28
44.03 7.64 7 2020-07-18
21:08:35
Bollettino Sismico Italiano INGV 78830971
Reviewed
Rev100
ML 2.4 2020-04-07
07:22:28
44.03 7.64 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 44.03 ± 0.00
Longitude 7.64 ± 0.01
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
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 Takeoff_angle Residual Weight
MN.TUE.HHZ. 2020-04-07T07:23:14.13 1.0 undecidable manual P 26 2.716 38 0.93 5
GU.RRL.HHZ. 2020-04-07T07:23:03.09 0.6 undecidable manual S 326 1.0747 50 -0.56 37
RD.ORIF.BHZ. 2020-04-07T07:22:57.58 1.0 undecidable manual P 306 1.5369 50 0.95 13
GU.BHB.HHZ. 2020-04-07T07:22:56.35 0.6 undecidable manual S 341 0.8454 50 -0.51 40
GU.TRAV.HHE. 2020-04-07T07:22:55.05 1.0 undecidable manual P 3 1.4794 50 -0.61 16
GU.GORR.HHE. 2020-04-07T07:22:53.39 0.6 undecidable manual P 64 1.3112 50 0.61 34
MN.BNI.HHZ. 2020-04-07T07:22:51.60 0.6 undecidable manual P 326 1.2276 50 0.25 39
GU.RRL.HHZ. 2020-04-07T07:22:49.05 0.3 undecidable manual P 326 1.0747 50 0.32 59
IV.MONC.HHZ. 2020-04-07T07:22:49.79 1.0 undecidable manual P 11 1.0585 50 1.33 13
GU.PZZ.HHZ. 2020-04-07T07:22:49.37 0.6 undecidable manual S 322 0.6043 50 -0.36 43
GU.CANO.HHZ. 2020-04-07T07:22:45.06 0.6 undecidable manual S 68 0.4605 50 -0.4 44
GU.BHB.HHZ. 2020-04-07T07:22:44.70 0.3 undecidable manual P 341 0.8454 50 -0.1 65
GU.PCP.HHZ. 2020-04-07T07:22:44.84 0.6 undecidable manual P 52 0.8211 50 0.45 41
GU.PZZ.HHZ. 2020-04-07T07:22:41.17 0.3 undecidable manual P 322 0.6043 50 0.48 63
IV.QLNO.HHZ. 2020-04-07T07:22:40.31 0.3 undecidable manual P 60 0.581 50 0.02 70
GU.STV.HHZ. 2020-04-07T07:22:40.26 0.6 undecidable manual S 313 0.3103 101 -0.23 47
GU.BURY.HNZ. 2020-04-07T07:22:38.28 0.6 undecidable manual S 194 0.259 103 -0.28 47
GU.GBOS.HHZ. 2020-04-07T07:22:38.11 0.3 undecidable manual S 34 0.2509 103 -0.15 73
GU.ENR.HHZ. 2020-04-07T07:22:38.03 0.3 undecidable manual S 320 0.25 103 -0.19 72
IV.IMI.HHZ. 2020-04-07T07:22:37.13 0.3 undecidable manual S 124 0.2185 105 0.09 74
GU.CANO.HHZ. 2020-04-07T07:22:37.98 0.3 undecidable manual P 68 0.4605 50 -0.24 69
GU.STV.HHZ. 2020-04-07T07:22:35.43 0.1 positive manual P 313 0.3103 101 0.07 98
GU.RORO.HHZ. 2020-04-07T07:22:35.27 0.3 undecidable manual P 75 0.3139 100 -0.17 72
GU.GBOS.HHZ. 2020-04-07T07:22:34.19 0.3 undecidable manual P 34 0.2509 103 0.12 73
GU.ENR.HHZ. 2020-04-07T07:22:34.33 0.1 positive manual P 320 0.25 103 0.29 95
GU.BURY.HNZ. 2020-04-07T07:22:34.13 0.3 undecidable manual P 194 0.259 103 -0.11 74
IV.IMI.HHZ. 2020-04-07T07:22:33.23 0.1 undecidable manual P 124 0.2185 105 -0.13 98
FR.SAOF.HHZ.00 2020-04-07T07:22:31.98 0.3 undecidable manual S 233 0.08 126 -0.18 75
FR.SAOF.HHZ.00 2020-04-07T07:22:30.72 0.1 negative manual P 233 0.08 126 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RNCA.HHN. ML:0 0.0001235 1.42 AML other m 2020-04-07T07:23:08.14
GU.RNCA.HHE. ML:0 0.0001195 0.74 AML other m 2020-04-07T07:23:08.39
RD.PGF.BHE. ML:0 3.26E-5 0.92 AML other m 2020-04-07T07:23:21.12
RD.PGF.BHN. ML:0 4.075E-5 1.4 AML other m 2020-04-07T07:23:22.80
IV.OSSC.HHN. ML:0 0.000586 1.12 AML other m 2020-04-07T07:23:54.06
IV.OSSC.HHE. ML:0 0.0005995 1.14 AML other m 2020-04-07T07:23:54.07
IV.IMI.HHN. ML:2.8 0.003684892 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 0.00069987145 0.7776 AML other m 2020-04-07T07:22:40.59
GU.GBOS.HHN. ML:2.1 0.0007449803 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 0.00109791935 0.24 AML other m 2020-04-07T07:22:38.23
GU.RORO.HHE. ML:2 0.00046430915 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 0.001825961 0.2592 AML other m 2020-04-07T07:22:39.89
GU.CANO.HHN. ML:2.5 0.0009193254 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 0.0006007201 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 0.0002084107 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 0.00014231064 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 0.00066140085 0.48 AML other m 2020-04-07T07:23:12.81
MN.BNI.HNN. ML:2 5.947234E-5 0.5792 AML other m 2020-04-07T07:23:18.70
MN.BNI.HHE. ML:2 5.9044725E-5 0.6176 AML other m 2020-04-07T07:23:13.75
MN.BNI.HNE. ML:2 6.579097E-5 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
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
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