Earthquake with magnitude of ML 1.8 on date 20-10-2021 and time 08:25:51 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.8 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 20-10-2021 06:25:51 (UTC)
  • 20-10-2021 08:25:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.81, 6.581 at 8 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
Claviere TO 20 214 214

Municipalities with at least 50000 inhabitants

An earthquake occurred to
90 Km W of Moncalieri (57294 inhabitants)
90 Km NW of Cuneo (56081 inhabitants)
92 Km W of Torino (890529 inhabitants)
Recent and historical seismicity
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
Reviewed
Rev100
ML 1.8 2021-10-20
06:25:51
44.8105 6.581 8 2021-10-20
06:36:14
Sala Sismica INGV-Roma 96790001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 06:25:51 ± 0.14
Latitude 44.8105 ± 0.0054
Longitude 6.5810 ± 0.0076
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96790001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 551
Semi-minor axis of confidence ellipse (meter) 548
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 22
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) 1.26894
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 96790001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 06:36:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PE3.EHZ. 2021-10-20T06:27:55.60 3.0 undecidable manual Sn 5.49 0
IV.IMOL.HNZ. 2021-10-20T06:27:48.15 3.0 undecidable manual Sg 14.6 0
IV.MNTV.EHZ. 2021-10-20T06:27:34.43 3.0 undecidable manual Sg 18.09 0
IV.LPEL.HHZ. 2021-10-20T06:27:32.30 3.0 negative manual Pn 9.47 0
IV.VENT.EHZ. 2021-10-20T06:27:27.62 3.0 positive manual Pn 1.42 0
IV.CESX.HHZ. 2021-10-20T06:27:23.31 3.0 undecidable manual Pg 18.5 0
IV.MOMA.HHZ. 2021-10-20T06:27:19.00 3.0 undecidable manual Pg 15.59 0
GU.GSCL.HHZ. 2021-10-20T06:27:18.79 3.0 undecidable manual Sn 5.19 0
IV.BLLA.EHZ. 2021-10-20T06:27:12.75 3.0 negative manual Pg 16.27 0
IV.IMOL.HNZ. 2021-10-20T06:26:59.68 3.0 positive manual Pg 10.79 0
IV.ZEN8.EHZ. 2021-10-20T06:26:50.44 3.0 negative manual Pg 10.59 0
IV.SERM.EHZ. 2021-10-20T06:26:47.08 3.0 positive manual Pn 3.07 0
GU.TRAV.HHZ. 2021-10-20T06:26:27.06 0.6 undecidable manual S 49 1.0801 50 0.23 40
GU.ENR.HHZ. 2021-10-20T06:26:19.64 0.6 undecidable manual S 134 0.8328 50 0.13 43
GU.PCP.HHZ. 2021-10-20T06:26:18.30 3.0 negative manual P 0.85 0
GU.LSD.HHZ. 2021-10-20T06:26:17.05 0.6 undecidable manual S 31 0.7572 50 -0.22 43
GU.STV.HHZ. 2021-10-20T06:26:17.67 0.6 undecidable manual S 137 0.7752 50 -0.15 44
IV.QLNO.HHZ. 2021-10-20T06:26:16.97 3.0 negative manual P 0.6 0
GU.RORO.HHZ. 2021-10-20T06:26:15.62 0.3 positive manual P 123 1.2689 50 0.45 55
FR.SAOF.HHZ.00 2021-10-20T06:26:12.14 0.6 positive manual P 140 1.0774 50 0.24 40
GU.TRAV.HHZ. 2021-10-20T06:26:12.35 0.6 undecidable manual P 49 1.0801 50 0.41 38
GU.GBOS.HHZ. 2021-10-20T06:26:11.68 0.3 undecidable manual P 122 1.0621 50 0.04 63
GU.CIRO.HHZ. 2021-10-20T06:26:11.89 0.6 undecidable manual P 41 1.0531 50 0.41 39
RD.ORIF.BHZ. 2021-10-20T06:26:09.32 0.6 undecidable manual S 282 0.5081 50 -0.58 41
GU.PZZ.HHZ. 2021-10-20T06:26:08.58 0.6 undecidable manual S 128 0.4865 50 -0.68 40
GU.ENR.HHZ. 2021-10-20T06:26:07.88 0.6 positive manual P 134 0.8328 50 0.17 43
GU.LSD.HHZ. 2021-10-20T06:26:06.51 0.3 positive manual P 31 0.7572 50 0.09 66
GU.STV.HHZ. 2021-10-20T06:26:06.60 0.6 undecidable manual P 137 0.7752 50 -0.14 44
GU.RSP.HHZ. 2021-10-20T06:26:03.72 0.3 positive manual P 55 0.59 50 0.17 68
RD.ORIF.BHZ. 2021-10-20T06:26:02.39 0.1 undecidable manual P 282 0.5081 50 0.23 90
GU.PZZ.HHZ. 2021-10-20T06:26:01.47 1.0 undecidable manual P 128 0.4865 50 -0.32 22
GU.BHB.HHZ. 2021-10-20T06:26:01.35 0.3 positive manual P 87 0.4838 50 -0.4 66
MN.BNI.HHZ. 2021-10-20T06:26:01.45 0.6 undecidable manual S 16 0.2509 105 -0.15 48
GU.RRL.HHZ. 2021-10-20T06:25:58.97 0.6 undecidable manual S 53 0.1844 110 -0.2 49
MN.BNI.HHZ. 2021-10-20T06:25:57.26 0.1 undecidable manual P 16 0.2509 105 -0.11 98
GU.RRL.HHZ. 2021-10-20T06:25:56.02 0.1 positive manual P 53 0.1844 110 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RRL.HHN. ML:2.1 0.0010868779 0.24 AML other m 2021-10-20T06:25:59.08
GU.RRL.HHE. ML:2.1 0.0010160495 0.5792 AML other m 2021-10-20T06:26:00.74
MN.BNI.HNE. ML:1.5 0.000153620665 0.3424 AML other m 2021-10-20T06:26:02.16
MN.BNI.HHE. ML:1.4 0.000148671695 0.3424 AML other m 2021-10-20T06:26:02.16
MN.BNI.HHN. ML:1.3 0.000105257015 0.3008 AML other m 2021-10-20T06:26:06.13
MN.BNI.HNN. ML:1.3 0.00010549775 0.2784 AML other m 2021-10-20T06:26:06.13
GU.BHB.HHN. ML:1.9 0.0001935 0.38 AML other m 2021-10-20T06:26:08.64
GU.BHB.HNN. ML:1.9 0.00019618185 0.3712 AML other m 2021-10-20T06:26:08.46
GU.PZZ.HHN. ML:2.2 0.00041754955 0.2208 AML other m 2021-10-20T06:26:10.74
GU.BHB.HNE. ML:1.8 0.0001715 0.46 AML other m 2021-10-20T06:26:10.69
GU.PZZ.HHE. ML:2.2 0.00041283335 0.3392 AML other m 2021-10-20T06:26:12.28
GU.BHB.HHE. ML:1.8 0.000134757115 0.72 AML other m 2021-10-20T06:26:13.81
GU.RSP.HHE. ML:1.8 0.00011965 0.26 AML other m 2021-10-20T06:26:14.11
GU.RSP.HHN. ML:1.7 9.8935105E-5 0.2816 AML other m 2021-10-20T06:26:17.22
GU.LSD.HHE. ML:2 0.0001305 0.3 AML other m 2021-10-20T06:26:18.70
GU.LSD.HHN. ML:1.8 9.09E-5 0.32 AML other m 2021-10-20T06:26:19.20
GU.ENR.HHN. ML:2 9.834085E-5 0.2016 AML other m 2021-10-20T06:26:20.65
GU.STV.HHN. ML:1.9 9.01E-5 1.72 AML other m 2021-10-20T06:26:21.08
GU.STV.HHE. ML:1.9 9.06E-5 0.56 AML other m 2021-10-20T06:26:21.12
GU.ENR.HHE. ML:1.9 8.71E-5 0.24 AML other m 2021-10-20T06:26:21.37
GU.TRAV.HHE. ML:2 8.215E-5 0.26 AML other m 2021-10-20T06:26:27.46
GU.CIRO.HHE. ML:1.6 3.535E-5 1.7 AML other m 2021-10-20T06:26:27.85
GU.GBOS.HHN. ML:1.9 5.5762595E-5 0.4384 AML other m 2021-10-20T06:26:27.62
GU.CIRO.HHN. ML:1.7 3.81524E-5 0.4192 AML other m 2021-10-20T06:26:28.09
GU.TRAV.HHN. ML:2 7.595E-5 0.28 AML other m 2021-10-20T06:26:29.55
FR.SAOF.HHE.00 ML:2.1 9.027553E-5 0.4 AML other m 2021-10-20T06:26:35.93
FR.SAOF.HHN.00 ML:2.2 0.000132 1.44 AML other m 2021-10-20T06:26:35.17
GU.GBOS.HHE. ML:1.8 5.201039E-5 0.3808 AML other m 2021-10-20T06:26:27.60
GU.RSP.HNE. ML:1.8 0.00010443213 0.2592 AML other m 2021-10-20T06:26:14.11
GU.RSP.HNN. ML:1.6 7.4072075E-5 0.2784 AML other m 2021-10-20T06:26:17.23
GU.RORO.HHE. ML:2.9 0.0005471414 0.88 AML other m 2021-10-20T06:26:16.91
GU.RORO.HHN. ML:2 5.4162145E-5 0.4192 AML other m 2021-10-20T06:26:39.83
IV.QLNO.HHE. ML:1.9 4.5093545E-5 0.24 AML other m 2021-10-20T06:26:17.21
IV.QLNO.HHN. ML:1.9 4.2732695E-5 0.32 AML other m 2021-10-20T06:26:36.04
GU.PCP.HHE. ML:2 4.8350195E-5 1.04 AML other m 2021-10-20T06:26:39.26
GU.PCP.HHN. ML:2 4.660008E-5 1.28 AML other m 2021-10-20T06:27:02.73
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