Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 18-04-2020 and time 13:15:01 (Italy) in region 3 km NW Rhêmes Notre Dame (AO)

A magnitude ML 0.5 earthquake occured in region: 3 km NW Rhêmes Notre Dame (AO), on

  • 18-04-2020 11:15:01 (UTC)
  • 18-04-2020 13:15:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.5910, 7.1060 at 8 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
Rhêmes-Notre-Dame AO 3 89 89
Valgrisenche AO 6 196 285
Valsavarenche AO 8 161 446
Rhêmes-Saint-Georges AO 8 194 640
Introd AO 13 658 1298
Avise AO 14 305 1603
Arvier AO 14 873 2476
Villeneuve AO 15 1289 3765
Saint-Nicolas AO 15 311 4076
Aymavilles AO 16 2086 6162
Saint-Pierre AO 16 3165 9327
La Salle AO 18 2087 11414
Sarre AO 19 4927 16341
La Thuile AO 19 761 17102
Jovençan AO 19 736 17838
Morgex AO 19 2104 19942
Cogne AO 20 1417 21359

Municipalities with at least 50000 inhabitants

An earthquake occurred to
73 Km NW of Torino (890529 inhabitants)
80 Km NW 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
Reviewed
Rev100 		ML 0.5 2020-04-18
11:15:01		 45.5912 7.1062 8 2020-04-18
11:23:32		 Sala Sismica INGV-Roma 78354911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-18 11:15:01 ± 0.24
Latitude 45.5912 ± 0.0099
Longitude 7.1062 ± 0.0347
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78354911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2638
Semi-minor axis of confidence ellipse (meter) 797
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 2640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70597
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 78354911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-18 11:23:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.RORO.HHZ. 2020-04-18T11:15:31.79 3.0 undecidable manual Pg 0.07 0
GU.RRL.HHE. 2020-04-18T11:15:15.16 0.6 undecidable manual P 198 78.366 50 -0.41 43
GU.SATI.HHZ. 2020-04-18T11:15:14.67 0.6 undecidable manual P 62 66.8775 50 0.86 37
GU.CIRO.HHZ. 2020-04-18T11:15:13.99 0.1 undecidable manual S 88 35.8419 50 -0.38 93
GU.TRAV.HHZ. 2020-04-18T11:15:11.32 0.6 negative manual P 100 50.5161 50 0.03 49
GU.CIRO.HHZ. 2020-04-18T11:15:09.25 0.1 undecidable manual P 88 35.8419 50 0.22 96
IV.MRGE.HHZ. 2020-04-18T11:15:08.64 0.6 undecidable manual S 350 20.1687 112 -0.65 44
GU.LSD.HHZ. 2020-04-18T11:15:07.37 0.1 undecidable manual S 171 14.7741 119 -0.24 99
IV.MRGE.HHZ. 2020-04-18T11:15:06.26 0.1 undecidable manual P 350 20.1687 112 0.17 100
GU.LSD.HHZ. 2020-04-18T11:15:05.48 0.1 undecidable manual P 171 14.7741 119 0.35 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.LSD.HHN. ML:1.1 0.0001295 0.06 AML other m 2020-04-18T11:15:07.48
GU.LSD.HHE. ML:1.2 0.00014617375 0.0576 AML other m 2020-04-18T11:15:07.44
IV.MRGE.HHE. ML:0.5 0.000023854124999999998 0.0576 AML other m 2020-04-18T11:15:09.83
IV.MRGE.HHN. ML:0.6 0.000029665419999999997 0.0768 AML other m 2020-04-18T11:15:09.51
GU.CIRO.HHE. ML:0.1 0.000007054661 0.3968 AML other m 2020-04-18T11:15:14.27
GU.CIRO.HHN. ML:0.6 0.000016569444999999997 0.2432 AML other m 2020-04-18T11:15:14.17
GU.TRAV.HHE. ML:0.3 0.000004896662499999999 0.16 AML other m 2020-04-18T11:15:18.81
GU.TRAV.HHN. ML:0.3 0.0000051680825 0.1408 AML other m 2020-04-18T11:15:22.22
GU.SATI.HHE. ML:0.4 0.000004584105450000001 0.4992 AML other m 2020-04-18T11:15:38.68
GU.SATI.HHN. ML:0.4 0.0000029020024999999997 0.4032 AML other m 2020-04-18T11:15:38.47
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