Earthquake with magnitude of ML 0.7 on date 17-12-2017 and time 04:42:20 (UTC) in region 8 km W Valtournenche (AO)

A magnitude ML 0.7 earthquake occured in region: 8 km W Valtournenche (AO), on

  • 17-12-2017 04:42:20 (UTC)
  • 17-12-2017 05:42:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.88, 7.53 at 5 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Valtournenche AO 8 2277 2277
Bionaz AO 8 236 2513
Chamois AO 9 97 2610
Torgnon AO 9 558 3168
Antey-Saint-André AO 10 602 3770
La Magdeleine AO 10 109 3879
Oyace AO 11 219 4098
Verrayes AO 13 1302 5400
Saint-Denis AO 14 378 5778
Ayas AO 14 1401 7179
Chambave AO 15 931 8110
Châtillon AO 16 4772 12882
Fénis AO 16 1813 14695
Nus AO 16 2984 17679
Valpelline AO 16 657 18336
Pontey AO 16 817 19153
Ollomont AO 17 157 19310
Saint-Vincent AO 17 4660 23970
Saint-Marcel AO 17 1362 25332
Quart AO 17 4039 29371
Doues AO 18 510 29881
Brissogne AO 19 1008 30889
Saint-Christophe AO 19 3432 34321
Roisan AO 20 1036 35357

Municipalities with at least 50000 inhabitants

An earthquake occurred to
90 Km N of Torino (890529 inhabitants)
98 Km W of Novara (104380 inhabitants)
98 Km N of Moncalieri (57294 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
Rev 1000 ML 0.7 2017-12-17
04:42:20
45.88 7.53 5 2018-09-04
09:10:45
Bollettino Sismico Italiano INGV 58999481
Rev 100 ML 0.7 2017-12-17
04:42:20
45.88 7.52 3 2017-12-17
04:49:57
Sala Sismica INGV-Roma 52635591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-17 04:42:20 ± 0.17
Latitude 45.88 ± 0.01
Longitude 7.53 ± 0.01
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 58999481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 949
Semi-minor axis of confidence ellipse (meter) 350
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 139
Circular confidence region, given by single value of horizontal uncertainty (meter) 950
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.21943
Epicentral distance of station farthest from the epicenter (degree) 0.75093
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 58999481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-07-23 14:42:03

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 52635591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-17 04:49:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RSP.HHZ. 2017-12-17T04:42:35.38 0.3 undecidable manual P 194 0.7509 50 0 70
GU.TRAV.HHZ. 2017-12-17T04:42:34.51 0.6 undecidable manual S 157 0.3948 96 -1.08 35
CH.MMK.HHZ. 2017-12-17T04:42:32.84 0.1 undecidable manual S 60 0.3498 97 -1.04 73
GU.CIRO.HHZ. 2017-12-17T04:42:30.68 0.6 undecidable manual S 174 0.2761 99 -0.37 48
GU.LSD.HHZ. 2017-12-17T04:42:30.89 0.3 undecidable manual P 213 0.4991 50 -0.18 71
GU.SATI.HHZ. 2017-12-17T04:42:29.99 0.6 undecidable manual S 90 0.2383 100 0.39 48
GU.REMY.HHZ. 2017-12-17T04:42:29.83 0.6 undecidable manual S 262 0.2599 99 -0.62 44
GU.TRAV.HHZ. 2017-12-17T04:42:29.15 0.1 undecidable manual P 157 0.3948 96 0.02 100
CH.DIX.HHZ. 2017-12-17T04:42:28.33 0.6 undecidable manual S 338 0.2194 101 -0.56 46
CH.MMK.HHZ. 2017-12-17T04:42:28.34 0.1 undecidable manual P 60 0.3498 97 0.2 97
GU.CIRO.HHZ. 2017-12-17T04:42:26.93 0.1 undecidable manual P 174 0.2761 99 0.43 94
GU.SATI.HHZ. 2017-12-17T04:42:26.30 0.1 undecidable manual P 90 0.2383 100 0.63 89
GU.REMY.HHZ. 2017-12-17T04:42:26.38 0.1 undecidable manual P 262 0.2599 99 0.22 99
CH.DIX.HHZ. 2017-12-17T04:42:25.66 0.1 positive manual P 338 0.2194 101 0.4 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.SATI.HHN. ML:0.7 3.195E-5 0.06 AML other m 2017-12-17T04:42:30.33
GU.SATI.HHE. ML:0.5 2.0315E-5 1.36 AML other m 2017-12-17T04:42:31.21
CH.MMK.HHN. ML:1 3.335E-5 0.44 AML other m 2017-12-17T04:42:32.72
CH.MMK.HHE. ML:0.7 1.845E-5 1.34 AML other m 2017-12-17T04:42:34.05
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