Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 08-09-2021 and time 14:51:49 (Italy) in region 10 km W Saint Rhémy en Bosses (AO)

A magnitude ML 1.9 earthquake occured in region: 10 km W Saint Rhémy en Bosses (AO), on

  • 08-09-2021 12:51:49 (UTC)
  • 08-09-2021 14:51:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.8660, 7.0700 at 10 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.

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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
Saint-Rhémy-en-Bosses AO 10 338 338
Courmayeur AO 11 2807 3145
Saint-Oyen AO 12 203 3348
Morgex AO 12 2104 5452
Pré-Saint-Didier AO 13 1050 6502
La Salle AO 13 2087 8589
Etroubles AO 14 501 9090
Allein AO 17 229 9319
Saint-Nicolas AO 18 311 9630
Avise AO 18 305 9935
Ollomont AO 19 157 10092
La Thuile AO 19 761 10853
Doues AO 19 510 11363
Arvier AO 20 873 12236

Municipalities with at least 50000 inhabitants

An earthquake occurred to
100 Km NW of Torino (890529 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 1.9 2021-09-08
12:51:49		 45.8658 7.0698 10 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99866831
Reviewed
Rev100 		ML 1.9 2021-09-08
12:51:49		 45.8672 7.0722 10 2021-09-08
13:03:14		 Sala Sismica INGV-Roma 95197221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-08 12:51:49 ± 0.18
Latitude 45.8658 ± 0.0090
Longitude 7.0698 ± 0.0194
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99866831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1532
Semi-minor axis of confidence ellipse (meter) 853
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 1530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
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) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.09623
Epicentral distance of station farthest from the epicenter (degree) 0.86874
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 99866831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-17 00:00:56

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 95197221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-08 13:03:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.MMK.HHE. 2021-09-08T12:52:11.15 0.6 undecidable manual S 73 71.9724 50 0.28 42
CH.GIMEL.HHE. 2021-09-08T12:52:05.64 0.3 undecidable manual P 320 96.4257 50 0.2 62
GU.LSD.HHZ. 2021-09-08T12:52:03.25 0.3 undecidable manual S 174 45.3213 50 -0.53 63
CH.MMK.HHE. 2021-09-08T12:52:01.75 0.3 undecidable manual P 73 71.9724 50 0.09 66
GU.TRAV.HHZ. 2021-09-08T12:52:01.18 0.3 undecidable manual P 127 65.49 50 0.52 61
CH.DIX.HHZ. 2021-09-08T12:52:00.62 0.3 undecidable manual S 48 35.2425 50 -0.47 65
GU.CIRO.HHZ. 2021-09-08T12:51:58.32 0.3 undecidable manual P 127 48.4182 50 0.28 66
GU.LSD.HHZ. 2021-09-08T12:51:57.81 0.3 undecidable manual P 174 45.3213 50 0.25 67
CH.DIX.HHZ. 2021-09-08T12:51:55.79 0.1 positive manual P 48 35.2425 50 -0.22 92
IV.MRGE.HHZ. 2021-09-08T12:51:54.06 0.3 undecidable manual S 184 10.6782 134 -0.19 72
IV.MRGE.HHZ. 2021-09-08T12:51:52.08 0.1 negative manual P 184 10.6782 134 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRGE.HHE. ML:2.1 0.0016 0.24 AML other m 2021-09-08T12:51:54.32
IV.MRGE.HHN. ML:1.9 0.000956873 0.064 AML other m 2021-09-08T12:51:54.36
CH.DIX.HHN. ML:1.8 0.00026231605000000003 0.2368 AML other m 2021-09-08T12:52:00.73
CH.DIX.HHE. ML:2.0 0.0003893849 0.1344 AML other m 2021-09-08T12:52:01.08
GU.LSD.HHE. ML:1.9 0.0002145 0.18 AML other m 2021-09-08T12:52:03.40
GU.LSD.HHN. ML:1.3 0.00006335000000000001 0.84 AML other m 2021-09-08T12:52:03.80
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