Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 29-09-2020 and time 14:29:02 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 0.9 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 29-09-2020 12:29:02 (UTC)
  • 29-09-2020 14:29:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0590, 7.6810 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.

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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 6 39 39
Triora IM 10 355 394
Mendatica IM 10 185 579
Molini di Triora IM 11 617 1196
Montegrosso Pian Latte IM 11 118 1314
Cosio d'Arroscia IM 12 221 1535
Pigna IM 14 859 2394
Castel Vittorio IM 14 287 2681
Pornassio IM 15 685 3366
Rezzo IM 16 366 3732
Bajardo IM 17 312 4044
Limone Piemonte CN 18 1485 5529
Carpasio IM 19 168 5697
Pieve di Teco IM 19 1338 7035
Armo IM 19 111 7146
Montalto Ligure IM 20 377 7523
Rocchetta Nervina IM 20 298 7821
Apricale IM 20 629 8450
Isolabona IM 20 679 9129

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Sanremo (54807 inhabitants)
39 Km S of Cuneo (56081 inhabitants)
70 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
Reviewed
Rev100 		ML 0.9 2020-09-29
12:29:02		 44.0587 7.6807 9 2020-09-29
12:34:48		 Sala Sismica INGV-Roma 83362591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-29 12:29:02 ± 0.13
Latitude 44.0587 ± 0.0072
Longitude 7.6807 ± 0.0088
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 83362591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 733
Semi-minor axis of confidence ellipse (meter) 572
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 38
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.09263
Epicentral distance of station farthest from the epicenter (degree) 0.31566
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:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 83362591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-29 12:34:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.STV.HHZ. 2020-09-29T12:29:14.44 0.3 undecidable manual S 306 35.0427 50 -0.76 62
GU.ENR.HHZ. 2020-09-29T12:29:12.70 0.6 undecidable manual S 312 27.8499 107 -0.29 46
IV.IMI.HHZ. 2020-09-29T12:29:11.17 0.3 undecidable manual S 134 23.6541 110 -0.43 69
GU.GBOS.HHZ. 2020-09-29T12:29:11.36 0.3 undecidable manual S 32 23.9538 110 -0.34 69
GU.STV.HHZ. 2020-09-29T12:29:10.08 0.1 undecidable manual P 306 35.0427 50 0.09 95
GU.ENR.HHZ. 2020-09-29T12:29:09.27 0.1 undecidable manual P 312 27.8499 107 0.56 88
GU.RORO.HHE. 2020-09-29T12:29:09.66 0.1 undecidable manual P 79 31.3464 106 0.29 92
GU.GBOS.HHZ. 2020-09-29T12:29:08.17 0.1 undecidable manual P 32 23.9538 110 0.21 96
FR.SAOF.HHZ.00 2020-09-29T12:29:08.03 0.3 undecidable manual S 232 12.9759 124 -0.25 72
IV.IMI.HHZ. 2020-09-29T12:29:08.07 0.1 undecidable manual P 134 23.6541 110 0.16 96
GU.MGRO.HHZ. 2020-09-29T12:29:07.29 0.3 undecidable manual S 100 10.2786 130 -0.26 72
FR.SAOF.HHZ.00 2020-09-29T12:29:06.22 0.1 undecidable manual P 232 12.9759 124 0.23 97
GU.MGRO.HHZ. 2020-09-29T12:29:05.67 0.1 undecidable manual P 100 10.2786 130 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.MGRO.HHE. ML:1.1 0.00016399999999999997 0.5 AML other m 2020-09-29T12:29:07.81
GU.MGRO.HHN. ML:1.0 0.00014885 0.8 AML other m 2020-09-29T12:29:08.48
FR.SAOF.HHE.00 ML:0.8 0.00007235 0.74 AML other m 2020-09-29T12:29:08.72
FR.SAOF.HHN.00 ML:0.8 0.00006475 1.22 AML other m 2020-09-29T12:29:09.11
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