Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 07-09-2020 and time 20:35:21 (UTC) in region 10 km NE Courmayeur (AO)

A magnitude ML 1.0 earthquake occured in region: 10 km NE Courmayeur (AO), on

  • 07-09-2020 20:35:21 (UTC)
  • 07-09-2020 22:35:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.8690, 7.0520 at 10 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
Courmayeur AO 10 2807 2807
Saint-Rhémy-en-Bosses AO 11 338 3145
Morgex AO 12 2104 5249
Pré-Saint-Didier AO 13 1050 6299
Saint-Oyen AO 13 203 6502
La Salle AO 14 2087 8589
Etroubles AO 15 501 9090
Allein AO 18 229 9319
La Thuile AO 19 761 10080
Saint-Nicolas AO 19 311 10391
Avise AO 19 305 10696

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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2020-09-07
20:35:21		 45.8693 7.0522 10 2020-09-07
20:46:37		 Sala Sismica INGV-Roma 82717831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-07 20:35:21 ± 0.16
Latitude 45.8693 ± 0.0099
Longitude 7.0522 ± 0.0142
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82717831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1106
Semi-minor axis of confidence ellipse (meter) 1062
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 317
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.07914
Epicentral distance of station farthest from the epicenter (degree) 1.25725
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 82717831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-07 20:46:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
RD.ORIF.BHE. 2020-09-07T20:35:45.68 0.3 undecidable manual P 221 139.5603 50 0.77 64
GU.BHB.HHE. 2020-09-07T20:35:41.81 0.3 undecidable manual P 172 115.8951 50 0.55 74
GU.TRAV.HHZ. 2020-09-07T20:35:41.62 0.6 undecidable manual S 126 66.7776 50 -0.74 50
GU.RRL.HHE. 2020-09-07T20:35:40.29 0.3 undecidable manual P 191 107.2149 50 0.37 79
CH.GIMEL.HHE. 2020-09-07T20:35:38.42 0.3 undecidable manual P 321 95.238 50 0.34 81
GU.CIRO.HHZ. 2020-09-07T20:35:37.26 0.6 undecidable manual S 126 49.8168 50 -0.55 56
GU.RSP.HHE. 2020-09-07T20:35:36.00 0.3 undecidable manual P 168 81.6516 50 0.01 89
GU.LSD.HHZ. 2020-09-07T20:35:35.95 0.6 undecidable manual S 172 45.9207 50 -0.82 50
GU.SATI.HHE. 2020-09-07T20:35:33.79 0.3 undecidable manual P 89 63.0924 50 0.67 78
CH.DIX.HHZ. 2020-09-07T20:35:33.24 0.6 undecidable manual S 49 36.0417 50 -0.9 50
GU.TRAV.HHZ. 2020-09-07T20:35:33.86 0.3 undecidable manual P 126 66.7776 50 0.16 89
GU.CIRO.HHZ. 2020-09-07T20:35:31.18 0.3 undecidable manual P 126 49.8168 50 0.11 93
GU.LSD.HHZ. 2020-09-07T20:35:30.47 0.3 undecidable manual P 172 45.9207 50 -0.01 95
CH.DIX.HHZ. 2020-09-07T20:35:28.69 0.3 undecidable manual P 49 36.0417 50 -0.27 92
GU.REMY.HHZ. 2020-09-07T20:35:26.95 0.6 undecidable manual S 113 8.7801 139 0.4 63
IV.MRGE.HHZ. 2020-09-07T20:35:26.91 0.6 undecidable manual S 176 11.0778 133 -0.2 65
GU.BLANC.HHZ. 2020-09-07T20:35:25.77 0.6 undecidable manual S 253 9.5793 137 -0.96 51
IV.MRGE.HHZ. 2020-09-07T20:35:24.98 0.3 undecidable manual P 176 11.0778 133 0.08 100
GU.REMY.HHZ. 2020-09-07T20:35:24.89 0.3 undecidable manual P 113 8.7801 139 0.31 96
GU.BLANC.HHZ. 2020-09-07T20:35:24.24 0.3 undecidable manual P 253 9.5793 137 -0.44 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.REMY.HHE. ML:0.8 0.000079733495 0.0768 AML other m 2020-09-07T20:35:24.95
GU.REMY.HHN. ML:0.5 0.000045779145 0.1024 AML other m 2020-09-07T20:35:27.08
IV.MRGE.HHE. ML:1.2 0.000181315945 0.0768 AML other m 2020-09-07T20:35:26.98
IV.MRGE.HHN. ML:1.3 0.0002422438 0.064 AML other m 2020-09-07T20:35:27.05
CH.DIX.HHE. ML:1.3 0.00008747487500000001 0.1152 AML other m 2020-09-07T20:35:33.82
CH.DIX.HHN. ML:1.3 0.00007821555 0.2304 AML other m 2020-09-07T20:35:33.47
GU.LSD.HHN. ML:0.8 0.000017566945 0.1152 AML other m 2020-09-07T20:35:36.91
GU.TRAV.HHE. ML:0.4 0.00000650974 0.2432 AML other m 2020-09-07T20:35:43.07
GU.TRAV.HHN. ML:0.8 0.000008313487500000002 0.0768 AML other m 2020-09-07T20:35:43.51
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