Earthquake with magnitude of ML 1.3 on date 21-02-2020 and time 19:33:46 (UTC) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.3 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 21-02-2020 19:33:46 (UTC)
  • 21-02-2020 20:33:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45, 6.75 at 11 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
Cesana Torinese TO 6 967 967
Claviere TO 7 214 1181
Oulx TO 8 3307 4488
Sauze d'Oulx TO 9 1109 5597
Bardonecchia TO 10 3215 8812
Sauze di Cesana TO 11 244 9056
Sestriere TO 11 929 9985
Salbertrand TO 14 596 10581
Pragelato TO 15 776 11357
Exilles TO 18 273 11630

Municipalities with at least 50000 inhabitants

An earthquake occurred to
74 Km W of Moncalieri (57294 inhabitants)
74 Km W of Torino (890529 inhabitants)
93 Km NW of Cuneo (56081 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 1.3 2020-02-21
19:33:46
45 6.75 11 2020-02-21
20:05:45
Sala Sismica INGV-Roma 76705981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-21 19:33:46 ± 0.42
Latitude 45.00 ± 0.01
Longitude 6.75 ± 0.04
Depth (km) 11 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76705981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3142
Semi-minor axis of confidence ellipse (meter) 1120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 295
Circular confidence region, given by single value of horizontal uncertainty (meter) 3140
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.83277
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 76705981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-21 20:05:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2020-02-21T19:34:05.10 0.3 undecidable manual S 152 0.5576 90 -0.6 61
GU.CIRO.HHZ. 2020-02-21T19:34:02.73 0.1 undecidable manual P 43 0.8328 90 0.33 83
GU.RSP.HHZ. 2020-02-21T19:34:00.03 0.6 undecidable manual S 68 0.3939 90 -0.82 38
GU.PZZ.HHZ. 2020-02-21T19:33:58.07 0.6 negative manual P 152 0.5576 90 0.39 43
GU.BHB.HHZ. 2020-02-21T19:33:55.25 3.0 negative manual P -0.04 0
GU.RSP.HHZ. 2020-02-21T19:33:54.98 0.1 undecidable manual P 68 0.3939 90 0.1 95
MN.BNI.HHZ. 2020-02-21T19:33:51.05 0.3 undecidable manual S 316 0.0719 130 -0.43 70
GU.RRL.HHZ. 2020-02-21T19:33:51.68 0.3 undecidable manual S 159 0.0845 123 -0.08 75
GU.RRL.HHZ. 2020-02-21T19:33:49.99 0.1 undecidable manual P 159 0.0845 123 0.36 96
MN.BNI.HHZ. 2020-02-21T19:33:49.65 0.1 undecidable manual P 316 0.0719 130 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.BNI.HNE. ML:1.2 0.0002221544 0.1408 AML other m 2020-02-21T19:33:51.14
MN.BNI.HNN. ML:0.7 5.816198E-5 0.0768 AML other m 2020-02-21T19:33:51.22
GU.RRL.HHE. ML:1.4 0.0003367088 0.128 AML other m 2020-02-21T19:33:51.77
GU.RRL.HHN. ML:1.3 0.00025744495 0.1408 AML other m 2020-02-21T19:33:52.01
GU.RSP.HHE. ML:1.5 8.801231E-5 0.2304 AML other m 2020-02-21T19:34:01.04
GU.RSP.HHN. ML:1.3 6.277157E-5 0.1152 AML other m 2020-02-21T19:34:01.13
GU.RSP.HNE. ML:1.4 8.046638E-5 0.2176 AML other m 2020-02-21T19:34:01.04
GU.RSP.HNN. ML:1.2 5.3868255E-5 0.1152 AML other m 2020-02-21T19:34:01.13
GU.BHB.HHE. ML:0.8 2.04523775E-5 0.6016 AML other m 2020-02-21T19:34:10.34
GU.BHB.HHN. ML:0.9 2.5295166E-5 0.1408 AML other m 2020-02-21T19:34:01.46
GU.PZZ.HHE. ML:1.4 5.1331875E-5 0.1792 AML other m 2020-02-21T19:34:06.57
GU.PZZ.HHN. ML:1.2 3.6230425E-5 0.2816 AML other m 2020-02-21T19:34:06.55
GU.CIRO.HHE. ML:1.2 1.7623305E-5 1.1904 AML other m 2020-02-21T19:34:33.83
GU.CIRO.HHN. ML:1.5 3.5452145E-5 2.1376 AML other m 2020-02-21T19:34:37.73
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