Earthquake with magnitude of ML 0.6 on date 31-12-2020 and time 02:18:30 (Italy) in region 3 km W Torgnon (AO)

A magnitude ML 0.6 earthquake occured in region: 3 km W Torgnon (AO), on

  • 31-12-2020 01:18:30 (UTC)
  • 31-12-2020 02:18:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.81, 7.54 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 3 558 558
Antey-Saint-André AO 4 602 1160
Verrayes AO 6 1302 2462
La Magdeleine AO 6 109 2571
Chamois AO 7 97 2668
Saint-Denis AO 7 378 3046
Chambave AO 8 931 3977
Châtillon AO 9 4772 8749
Pontey AO 9 817 9566
Fénis AO 9 1813 11379
Valtournenche AO 9 2277 13656
Nus AO 10 2984 16640
Saint-Vincent AO 11 4660 21300
Ayas AO 11 1401 22701
Bionaz AO 12 236 22937
Saint-Marcel AO 12 1362 24299
Quart AO 13 4039 28338
Oyace AO 13 219 28557
Brissogne AO 14 1008 29565
Emarèse AO 16 226 29791
Montjovet AO 16 1801 31592
Brusson AO 16 897 32489
Saint-Christophe AO 16 3432 35921
Champdepraz AO 17 712 36633
Valpelline AO 17 657 37290
Pollein AO 17 1569 38859
Doues AO 18 510 39369
Roisan AO 18 1036 40405
Ollomont AO 18 157 40562
Challand-Saint-Anselme AO 19 751 41313
Challand-Saint-Victor AO 19 564 41877
Aosta AO 19 34390 76267
Gignod AO 20 1710 77977
Verrès AO 20 2696 80673
Charvensod AO 20 2468 83141

Municipalities with at least 50000 inhabitants

An earthquake occurred to
83 Km N of Torino (890529 inhabitants)
91 Km N of Moncalieri (57294 inhabitants)
93 Km W of Novara (104380 inhabitants)
99 Km W of Gallarate (53343 inhabitants)
99 Km W of Varese (80799 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 0.6 2020-12-31
01:18:30
45.81 7.54 7 2020-12-31
01:27:17
Sala Sismica INGV-Roma 85893091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-31 01:18:30 ± 0.17
Latitude 45.81 ± 0.01
Longitude 7.54 ± 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 85893091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 970
Semi-minor axis of confidence ellipse (meter) 780
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 970
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.21224
Epicentral distance of station farthest from the epicenter (degree) 0.33904
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:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85893091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-31 01:27:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MRGE.HHZ. 2020-12-31T01:18:43.11 0.3 undecidable manual S 263 0.339 101 -0.72 82
GU.TRAV.HHZ. 2020-12-31T01:18:42.79 0.3 undecidable manual S 155 0.3327 101 -0.79 80
GU.REMY.HHZ. 2020-12-31T01:18:41.23 0.3 undecidable manual S 275 0.2707 104 -0.02 100
CH.DIX.HHZ. 2020-12-31T01:18:41.07 0.3 undecidable manual S 341 0.2824 103 -0.61 87
GU.SATI.HHZ. 2020-12-31T01:18:39.65 0.3 undecidable manual S 75 0.2338 106 -0.23 97
IV.MRGE.HHZ. 2020-12-31T01:18:38.63 0.6 undecidable manual P 263 0.339 101 0.43 60
GU.CIRO.HHZ. 2020-12-31T01:18:38.96 0.3 undecidable manual S 175 0.2122 107 -0.13 99
GU.TRAV.HHZ. 2020-12-31T01:18:38.14 0.3 positive manual P 155 0.3327 101 0.08 98
CH.DIX.HHZ. 2020-12-31T01:18:37.21 0.6 positive manual P 341 0.2824 103 0.25 63
GU.REMY.HHZ. 2020-12-31T01:18:37.52 0.3 undecidable manual P 275 0.2707 104 0.81 80
GU.CIRO.HHZ. 2020-12-31T01:18:36.16 0.3 undecidable manual P 175 0.2122 107 0.7 85
GU.SATI.HHZ. 2020-12-31T01:18:36.33 0.3 undecidable manual P 75 0.2338 106 0.41 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CIRO.HHE. ML:0.5 1.8016715E-5 0.06 AML other m 2020-12-31T01:18:39.34
GU.CIRO.HHN. ML:0.4 1.5082905E-5 0.14 AML other m 2020-12-31T01:18:39.71
CH.DIX.HHE. ML:1 4.7905685E-5 1.84 AML other m 2020-12-31T01:18:41.99
CH.DIX.HHN. ML:0.9 4.010572E-5 0.58 AML other m 2020-12-31T01:18:41.24
GU.REMY.HHE. ML:0.5 1.408695E-5 1.46 AML other m 2020-12-31T01:18:41.28
GU.REMY.HHN. ML:0.6 2.0420863E-5 1.18 AML other m 2020-12-31T01:18:41.29
GU.TRAV.HHE. ML:0.4 1.1656094E-5 0.08 AML other m 2020-12-31T01:18:42.88
GU.TRAV.HHN. ML:0.6 1.6896325E-5 0.08 AML other m 2020-12-31T01:18:43.17
IV.MRGE.HHE. ML:0.4 8.0530785E-6 0.98 AML other m 2020-12-31T01:18:44.12
IV.MRGE.HHN. ML:0.4 1.23601855E-5 1.22 AML other m 2020-12-31T01:18:43.65
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download