Earthquake with magnitude of ML 0.4 on date 09-10-2020 and time 20:55:47 (Italy) in region 6 km NW Torgnon (AO)

A magnitude ML 0.4 earthquake occured in region: 6 km NW Torgnon (AO), on

  • 09-10-2020 18:55:47 (UTC)
  • 09-10-2020 20:55:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.84, 7.52 at 7 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
Torgnon AO 6 558 558
Antey-Saint-André AO 7 602 1160
Bionaz AO 8 236 1396
Chamois AO 8 97 1493
La Magdeleine AO 9 109 1602
Verrayes AO 9 1302 2904
Valtournenche AO 9 2277 5181
Oyace AO 10 219 5400
Saint-Denis AO 11 378 5778
Chambave AO 11 931 6709
Fénis AO 12 1813 8522
Nus AO 12 2984 11506
Châtillon AO 13 4772 16278
Pontey AO 13 817 17095
Saint-Marcel AO 13 1362 18457
Quart AO 14 4039 22496
Ayas AO 14 1401 23897
Saint-Vincent AO 15 4660 28557
Valpelline AO 15 657 29214
Brissogne AO 15 1008 30222
Ollomont AO 16 157 30379
Saint-Christophe AO 16 3432 33811
Doues AO 16 510 34321
Roisan AO 17 1036 35357
Pollein AO 18 1569 36926
Gignod AO 18 1710 38636
Allein AO 19 229 38865
Aosta AO 19 34390 73255
Brusson AO 19 897 74152
Emarèse AO 19 226 74378
Montjovet AO 20 1801 76179
Charvensod AO 20 2468 78647

Municipalities with at least 50000 inhabitants

An earthquake occurred to
86 Km N of Torino (890529 inhabitants)
94 Km N of Moncalieri (57294 inhabitants)
97 Km W of Novara (104380 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 0.4 2020-10-09
18:55:47
45.84 7.52 7 2020-10-09
19:02:37
Sala Sismica INGV-Roma 83656531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-09 18:55:47 ± 0.14
Latitude 45.84 ± 0.01
Longitude 7.52 ± 0.01
Depth (km) 7 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83656531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 840
Semi-minor axis of confidence ellipse (meter) 750
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 359
Circular confidence region, given by single value of horizontal uncertainty (meter) 840
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.24282
Epicentral distance of station farthest from the epicenter (degree) 0.37502
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 83656531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-09 19:02:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CH.MMK.HHE. 2020-10-09T18:56:01.72 0.3 undecidable manual S 56 0.375 50 -0.3 72
CH.DIX.HHZ. 2020-10-09T18:55:57.22 0.3 undecidable manual S 343 0.2491 105 -0.33 73
GU.SATI.HHE. 2020-10-09T18:55:57.19 0.6 undecidable manual S 82 0.2482 105 -0.32 49
GU.REMY.HHZ. 2020-10-09T18:55:56.98 0.1 undecidable manual S 269 0.25 105 -0.6 91
GU.CIRO.HHZ. 2020-10-09T18:55:56.95 0.3 undecidable manual S 171 0.2428 105 -0.37 73
CH.MMK.HHE. 2020-10-09T18:55:56.47 0.3 undecidable manual P 56 0.375 50 0.53 68
IV.MRGE.HHZ. 2020-10-09T18:55:55.31 0.3 undecidable manual P 257 0.3247 102 0.32 73
CH.DIX.HHZ. 2020-10-09T18:55:53.83 0.1 undecidable manual P 343 0.2491 105 0.47 95
GU.SATI.HHE. 2020-10-09T18:55:53.08 0.3 undecidable manual P 82 0.2482 105 -0.26 75
GU.REMY.HHZ. 2020-10-09T18:55:53.60 0.1 undecidable manual P 269 0.25 105 0.23 100
GU.CIRO.HHZ. 2020-10-09T18:55:53.62 0.1 undecidable manual P 171 0.2428 105 0.39 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.REMY.HHE. ML:0 4.429903E-6 0.0896 AML other m 2020-10-09T18:55:57.16
GU.REMY.HHN. ML:0 5.8170565E-6 0.6528 AML other m 2020-10-09T18:55:56.88
GU.CIRO.HHE. ML:0 4.8829945E-6 0.1408 AML other m 2020-10-09T18:55:56.00
GU.CIRO.HHN. ML:0 3.16811425E-6 0.1536 AML other m 2020-10-09T18:55:57.42
CH.DIX.HHE. ML:0.3 8.4252855E-6 0.1024 AML other m 2020-10-09T18:55:57.36
CH.DIX.HHN. ML:0.4 1.28946885E-5 0.768 AML other m 2020-10-09T18:55:57.54
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