Earthquake with magnitude of ML 1.5 on date 19-08-2021 and time 12:29:54 (Italy) in region 4 km SE La Thuile (AO)

A magnitude ML 1.5 earthquake occured in region: 4 km SE La Thuile (AO), on

  • 19-08-2021 10:29:54 (UTC)
  • 19-08-2021 12:29:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.6940, 6.9920 at 11 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
La Thuile AO 4 761 761
Pré-Saint-Didier AO 8 1050 1811
Morgex AO 8 2104 3915
La Salle AO 9 2087 6002
Valgrisenche AO 9 196 6198
Courmayeur AO 11 2807 9005
Avise AO 12 305 9310
Rhêmes-Saint-Georges AO 14 194 9504
Arvier AO 14 873 10377
Saint-Nicolas AO 14 311 10688
Introd AO 15 658 11346
Rhêmes-Notre-Dame AO 17 89 11435
Villeneuve AO 17 1289 12724
Saint-Pierre AO 18 3165 15889
Aymavilles AO 20 2086 17975

Municipalities with at least 50000 inhabitants

An earthquake occurred to
88 Km NW of Torino (890529 inhabitants)
94 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
Bulletin
Rev1000
ML 1.5 2021-08-19
10:29:54
45.6937 6.9915 11 2021-12-29
11:12:35
Bollettino Sismico Italiano INGV 96322111
Reviewed
Rev100
ML 1.5 2021-08-19
10:29:54
45.6902 6.9898 11 2021-08-19
10:37:18
Sala Sismica INGV-Roma 94369161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-19 10:29:54 ± 0.17
Latitude 45.6937 ± 0.0063
Longitude 6.9915 ± 0.0155
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96322111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1189
Semi-minor axis of confidence ellipse (meter) 566
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 89
Circular confidence region, given by single value of horizontal uncertainty (meter) 1190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
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) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 1.18980
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 96322111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 14:24:02

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 94369161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-19 10:37:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PZZ.HHE. 2021-08-19T10:30:32.95 0.6 undecidable manual S 176 132.0678 50 0.34 37
CH.GIMEL.HHE. 2021-08-19T10:30:26.16 0.3 undecidable manual S 329 108.6135 50 -0.2 60
GU.BHB.HHZ. 2021-08-19T10:30:22.99 0.1 undecidable manual S 167 97.5246 50 -0.41 79
GU.RRL.HHE. 2021-08-19T10:30:20.48 0.3 undecidable manual S 190 87.1461 50 -0.14 64
GU.PZZ.HHE. 2021-08-19T10:30:17.52 0.1 undecidable manual P 176 132.0678 50 0.86 62
MN.BNI.HHZ. 2021-08-19T10:30:16.46 0.1 undecidable manual S 199 75.2691 50 -0.99 66
GU.RSP.HHZ. 2021-08-19T10:30:14.29 0.1 undecidable manual S 161 64.0914 50 -0.19 88
CH.GIMEL.HHE. 2021-08-19T10:30:13.47 0.1 undecidable manual P 329 108.6135 50 0.41 77
GU.TRAV.HHZ. 2021-08-19T10:30:13.81 0.3 undecidable manual S 109 61.8936 50 -0.09 68
GU.BHB.HHZ. 2021-08-19T10:30:12.17 0.1 negative manual P 167 97.5246 50 0.83 68
CH.DIX.HHZ. 2021-08-19T10:30:11.33 0.1 undecidable manual S 37 53.6019 50 -0.34 87
GU.RRL.HHE. 2021-08-19T10:30:09.85 0.1 undecidable manual P 190 87.1461 50 0.11 86
MN.BNI.HHZ. 2021-08-19T10:30:07.77 0.1 undecidable manual P 199 75.2691 50 -0.14 87
GU.TRAV.HHZ. 2021-08-19T10:30:06.50 0.1 undecidable manual P 109 61.8936 50 0.64 78
GU.RSP.HHZ. 2021-08-19T10:30:06.45 0.1 undecidable manual P 161 64.0914 50 0.25 87
GU.LSD.HHZ. 2021-08-19T10:30:04.54 0.1 undecidable manual S 157 28.2495 50 -0.36 91
CH.DIX.HHZ. 2021-08-19T10:30:04.72 0.1 undecidable manual P 37 53.6019 50 0.14 91
GU.LSD.HHZ. 2021-08-19T10:30:00.81 0.1 positive manual P 157 28.2495 50 0.15 95
IV.MRGE.HHZ. 2021-08-19T10:29:59.54 0.1 undecidable manual S 32 9.9789 138 -0.48 91
IV.MRGE.HHZ. 2021-08-19T10:29:57.81 0.1 positive manual P 32 9.9789 138 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRGE.HHN. ML:2.1 0.00164 0.22 AML other m 2021-08-19T10:29:59.82
IV.MRGE.HHE. ML:2.1 0.001655 0.28 AML other m 2021-08-19T10:29:59.71
GU.LSD.HHE. ML:1.6 0.0002105 0.3 AML other m 2021-08-19T10:30:04.66
GU.LSD.HHN. ML:1.3 0.00009675000000000001 0.18 AML other m 2021-08-19T10:30:04.73
CH.DIX.HHE. ML:1.7 0.00011549999999999999 0.64 AML other m 2021-08-19T10:30:11.50
CH.DIX.HHN. ML:1.7 0.000128 0.36 AML other m 2021-08-19T10:30:12.03
GU.RSP.HHE. ML:1.2 0.0000301 0.76 AML other m 2021-08-19T10:30:15.58
GU.TRAV.HHN. ML:1.4 0.0000426 1.06 AML other m 2021-08-19T10:30:15.99
GU.TRAV.HHE. ML:1.1 0.000026700000000000002 0.1 AML other m 2021-08-19T10:30:16.74
GU.RSP.HHN. ML:1.2 0.0000282 0.92 AML other m 2021-08-19T10:30:20.51
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