Earthquake with magnitude of ML 1.4 on date 17-05-2020 and time 16:20:45 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.4 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 17-05-2020 14:20:45 (UTC)
  • 17-05-2020 16:20:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.97, 7.33 at 6 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
Olivetta San Michele IM 18 211 211

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Sanremo (54807 inhabitants)
51 Km SW of Cuneo (56081 inhabitants)
99 Km W of Savona (61345 inhabitants)
Recent and historical Seismicity
Seismic hazard
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 ( 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
ML 1.4 2020-05-17
43.97 7.33 6 2020-05-17
Sala Sismica INGV-Roma 79232121
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-05-17 14:20:45 ± 0.2
Latitude 43.97 ± 0.01
Longitude 7.33 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79232121


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1037
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 1040
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 175
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.40744
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information


Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 79232121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-17 14:32:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
RD.ORIF.BHE. 2020-05-17T14:21:12.45 1.0 undecidable manual P 313 1.4074 50 0.69 16
GU.RRL.HHE. 2020-05-17T14:21:05.91 1.0 undecidable manual P 338 1.0297 50 0.61 19
GU.RORO.HHZ. 2020-05-17T14:21:05.20 0.6 undecidable manual S 74 0.5468 50 -0.18 46
FR.IMI.HHZ. 2020-05-17T14:21:00.99 1.0 undecidable manual S 100
GU.RORO.HHZ. 2020-05-17T14:20:57.03 0.3 negative manual P 74 0.5468 50 -0.01 72
GU.STV.HHE. 2020-05-17T14:20:56.00 1.0 undecidable manual S 359 0.2797 101 -0.64 22
GU.ENR.HHN. 2020-05-17T14:20:56.06 0.6 undecidable manual S 14 0.268 102 -0.15 49
GU.GBOS.HHZ. 2020-05-17T14:20:55.40 0.6 undecidable manual P 53 0.4569 50 -0.1 48
GU.BURY.HHZ. 2020-05-17T14:20:54.97 0.6 undecidable manual S 138 0.2446 103 -0.34 47
GU.ENR.HHN. 2020-05-17T14:20:52.01 1.0 undecidable manual P 14 0.268 102 0.26 24
FR.SAOF.HHZ.00 2020-05-17T14:20:52.45 0.3 undecidable manual S 83 0.1601 109 0.26 73
GU.STV.HHE. 2020-05-17T14:20:51.65 1.0 undecidable manual P 359 0.2797 101 -0.34 23
GU.BURY.HHZ. 2020-05-17T14:20:51.15 0.6 undecidable manual P 138 0.2446 103 -0.08 50
FR.SAOF.HHZ.00 2020-05-17T14:20:49.58 0.1 positive manual P 83 0.1601 109 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHN. ML:0 0.0001755339 0.2176 AML other m 2020-05-17T14:20:56.34
FR.SAOF.HHE.00 ML:1 9.2177875E-5 0.416 AML other m 2020-05-17T14:20:52.78
FR.SAOF.HHN.00 ML:1 8.246069E-5 0.096 AML other m 2020-05-17T14:20:52.49
GU.STV.HHE. ML:1.4 0.00013718416 0.1024 AML other m 2020-05-17T14:20:56.25
GU.ENR.HHE. ML:1.6 0.00020017975 0.2368 AML other m 2020-05-17T14:20:56.22
GU.ENR.HHN. ML:1.4 0.000128021335 0.16 AML other m 2020-05-17T14:20:56.65
GU.RORO.HHE. ML:1.6 7.942988E-5 1.0816 AML other m 2020-05-17T14:21:05.72
GU.RORO.HHN. ML:1.2 3.1831325E-5 0.1024 AML other m 2020-05-17T14:21:06.81
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download