Earthquake with magnitude of ML 1.7 on date 22-10-2020 and time 09:38:09 (Italy) in region 12 km NE Courmayeur (AO)

A magnitude ML 1.7 earthquake occured in region: 12 km NE Courmayeur (AO), on

  • 22-10-2020 07:38:09 (UTC)
  • 22-10-2020 09:38:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.89, 7.06 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
Courmayeur AO 12 2807 2807
Saint-Rhémy-en-Bosses AO 12 338 3145
Saint-Oyen AO 14 203 3348
Morgex AO 14 2104 5452
Pré-Saint-Didier AO 15 1050 6502
La Salle AO 16 2087 8589
Etroubles AO 16 501 9090
Allein AO 19 229 9319

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 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
Reviewed
Rev100
ML 1.7 2020-10-22
07:38:09
45.89 7.05 11 2020-10-22
07:49:43
Sala Sismica INGV-Roma 84017641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-22 07:38:09 ± 0.16
Latitude 45.89 ± 0.01
Longitude 7.05 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84017641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1125
Semi-minor axis of confidence ellipse (meter) 755
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.98296
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 84017641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-22 07:49:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RSP.HHZ. 2020-10-22T07:38:34.44 0.3 undecidable manual S 169 0.7527 50 0.02 66
GU.BHB.HHZ. 2020-10-22T07:38:30.39 3.0 undecidable manual P 0
GU.TRAV.HHZ. 2020-10-22T07:38:29.80 0.3 undecidable manual S 128 0.6115 50 -0.42 63
GU.SATI.HHZ. 2020-10-22T07:38:28.71 0.3 undecidable manual S 91 0.5666 50 -0.18 67
GU.RRL.HHE. 2020-10-22T07:38:27.85 0.3 undecidable manual P 191 0.983 50 0 63
MN.BNI.HHE. 2020-10-22T07:38:26.80 0.3 undecidable manual P 198 0.875 50 0.8 52
GU.LSD.HHZ. 2020-10-22T07:38:24.43 0.3 undecidable manual S 173 0.4308 50 -0.45 65
GU.RSP.HHZ. 2020-10-22T07:38:23.52 0.1 undecidable manual P 169 0.7527 50 -0.39 82
GU.TRAV.HHZ. 2020-10-22T07:38:22.12 0.3 undecidable manual P 128 0.6115 50 0.64 59
CH.MMK.HHE. 2020-10-22T07:38:22.64 0.3 undecidable manual P 75 0.652 50 0.46 62
GU.SATI.HHZ. 2020-10-22T07:38:20.42 0.3 undecidable manual P 91 0.5666 50 -0.29 65
CH.DIX.HHZ. 2020-10-22T07:38:20.66 0.3 undecidable manual S 52 0.3121 50 -0.7 61
GU.CIRO.HHE. 2020-10-22T07:38:19.24 0.3 undecidable manual P 128 0.4578 50 0.38 65
GU.LSD.HHZ. 2020-10-22T07:38:18.79 0.1 undecidable manual P 173 0.4308 50 0.39 88
CH.DIX.HHZ. 2020-10-22T07:38:16.43 0.1 undecidable manual P 52 0.3121 50 0.06 96
IV.MRGE.HHZ. 2020-10-22T07:38:15.03 0.3 undecidable manual S 178 0.1178 129 -0.34 71
GU.BLANC.HHZ. 2020-10-22T07:38:14.06 0.3 undecidable manual S 243 0.0944 135 -0.65 65
GU.REMY.HHZ. 2020-10-22T07:38:14.48 0.3 undecidable manual S 125 0.0863 138 -0.02 76
IV.MRGE.HHZ. 2020-10-22T07:38:13.06 0.1 undecidable manual P 178 0.1178 129 0.15 98
GU.REMY.HHZ. 2020-10-22T07:38:12.72 0.1 undecidable manual P 125 0.0863 138 0.32 95
GU.BLANC.HHZ. 2020-10-22T07:38:12.60 0.1 undecidable manual P 243 0.0944 135 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BLANC.HHE. ML:0 0.002003616 0.1792 AML other m 2020-10-22T07:38:14.38
GU.BLANC.HHN. ML:0 0.00137836255 0.1152 AML other m 2020-10-22T07:38:14.19
CH.DIX.HHE. ML:0 0.00040776165 0.2048 AML other m 2020-10-22T07:38:20.87
CH.DIX.HHN. ML:0 0.0002572469 0.2112 AML other m 2020-10-22T07:38:21.04
GU.TRAV.HHE. ML:0 3.872475E-5 0.1984 AML other m 2020-10-22T07:38:31.13
GU.TRAV.HHN. ML:0 3.6228045E-5 0.2432 AML other m 2020-10-22T07:38:36.16
GU.REMY.HHE. ML:1.5 0.00039070485 0.1984 AML other m 2020-10-22T07:38:14.96
GU.REMY.HHN. ML:1.8 0.0007888808 0.2048 AML other m 2020-10-22T07:38:14.55
IV.MRGE.HHE. ML:2 0.001136758 0.0832 AML other m 2020-10-22T07:38:15.14
IV.MRGE.HHN. ML:2.2 0.0016782135 0.0768 AML other m 2020-10-22T07:38:15.11
GU.LSD.HHE. ML:1.6 0.00010908293 0.1216 AML other m 2020-10-22T07:38:24.58
GU.LSD.HHN. ML:1.2 4.3765775E-5 0.0576 AML other m 2020-10-22T07:38:25.93
GU.SATI.HHE. ML:1 2.07527515E-5 0.0768 AML other m 2020-10-22T07:38:29.96
GU.SATI.HHN. ML:1 2.105485E-5 0.0832 AML other m 2020-10-22T07:38:29.94
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