Earthquake with magnitude of ML 1.3 on date 12-09-2021 and time 12:13:40 (Italy) in region 10 km NW Saint Rhémy en Bosses (AO)

A magnitude ML 1.3 earthquake occured in region: 10 km NW Saint Rhémy en Bosses (AO), on

  • 12-09-2021 10:13:40 (UTC)
  • 12-09-2021 12:13:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.873, 7.07 at 11 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
Saint-Rhémy-en-Bosses AO 10 338 338
Courmayeur AO 12 2807 3145
Saint-Oyen AO 12 203 3348
Morgex AO 13 2104 5452
Pré-Saint-Didier AO 14 1050 6502
La Salle AO 14 2087 8589
Etroubles AO 14 501 9090
Allein AO 17 229 9319
Ollomont AO 19 157 9476
Saint-Nicolas AO 19 311 9787
Avise AO 19 305 10092
Doues AO 19 510 10602
La Thuile AO 20 761 11363

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.3 2021-09-12
10:13:40
45.8727 7.0697 11 2021-09-12
10:37:16
Sala Sismica INGV-Roma 95340731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 10:13:40 ± 0.18
Latitude 45.8727 ± 0.0081
Longitude 7.0697 ± 0.0168
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95340731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1229
Semi-minor axis of confidence ellipse (meter) 886
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
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) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.10252
Epicentral distance of station farthest from the epicenter (degree) 0.86335
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 95340731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-12 10:37:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CH.GIMEL.HHE. 2021-09-12T10:14:08.20 0.6 undecidable manual S 320 0.8633 50 -0.5 39
CH.MMK.HHE. 2021-09-12T10:14:01.76 0.6 undecidable manual S 74 0.6466 50 -0.5 41
GU.TRAV.HHZ. 2021-09-12T10:14:00.53 0.6 undecidable manual S 127 0.5936 50 -0.18 44
CH.GIMEL.HHE. 2021-09-12T10:13:57.04 0.3 undecidable manual P 320 0.8633 50 0.22 62
GU.CIRO.HHE. 2021-09-12T10:13:55.99 0.3 undecidable manual S 128 0.4407 50 -0.18 68
GU.LSD.HHZ. 2021-09-12T10:13:54.85 0.3 undecidable manual S 174 0.4155 50 -0.57 62
CH.MMK.HHE. 2021-09-12T10:13:53.91 1.0 undecidable manual P 74 0.6466 50 0.81 18
GU.TRAV.HHZ. 2021-09-12T10:13:52.76 0.1 undecidable manual P 127 0.5936 50 0.55 80
CH.DIX.HHZ. 2021-09-12T10:13:51.98 0.3 undecidable manual S 48 0.3139 50 -0.43 66
GU.LSD.HHZ. 2021-09-12T10:13:49.59 0.1 undecidable manual P 174 0.4155 50 0.44 86
GU.CIRO.HHE. 2021-09-12T10:13:49.99 0.1 undecidable manual P 128 0.4407 50 0.4 86
CH.DIX.HHZ. 2021-09-12T10:13:47.52 0.1 undecidable manual P 48 0.3139 50 0.11 94
IV.MRGE.HHZ. 2021-09-12T10:13:45.60 0.3 undecidable manual S 183 0.1025 133 -0.44 69
IV.MRGE.HHZ. 2021-09-12T10:13:43.71 0.1 negative manual P 183 0.1025 133 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRGE.HHN. ML:1.5 0.0003685 0.32 AML other m 2021-09-12T10:13:45.96
IV.MRGE.HHE. ML:1.6 0.000457 0.06 AML other m 2021-09-12T10:13:45.92
CH.DIX.HHN. ML:1.4 9.355E-5 0.56 AML other m 2021-09-12T10:13:52.32
CH.DIX.HHE. ML:1.5 0.0001375 0.4 AML other m 2021-09-12T10:13:52.46
GU.LSD.HHE. ML:1.3 5.675E-5 0.64 AML other m 2021-09-12T10:13:55.01
GU.LSD.HHN. ML:0.8 2.23E-5 0.8 AML other m 2021-09-12T10:13:55.40
GU.TRAV.HHE. ML:0.7 9.5637525E-6 0.1024 AML other m 2021-09-12T10:14:02.81
GU.TRAV.HHN. ML:0.9 1.40346525E-5 0.0768 AML other m 2021-09-12T10:14:02.43
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